| [imported arthropod-borne parasites and parasitic arthropods in dogs. species spectrum and epidemiologic analysis of the cases diagnosed in 1995/96]. | between january 1995 and december 1996 nonendemic or only regionally occurring arthropodborne parasites including ehrlichiae and parasitic arthropods in germany were detected in 484 dogs, whereby at least 15 species were involved. listed in decreasing order, leishmania infections occurred most frequently, followed by infections/infestations with babesia canis, ehrlichia canis, rhipicephalus sanguineus, dirofilaria immitis and dermacentor reticulatus. the other species, namely babesia gibsoni, tr ... | 1998 | 9531673 |
| antibody response to hepatozoon canis in experimentally infected dogs. | canine hepatozoonosis is a disease caused by the tick-borne protozoan hepatozoon canis. five puppies were inoculated by ingestion of rhipicephalus sanguineus ticks experimentally infected with h. canis, and all became infected with h. canis: gametocytes were detected in blood smears from four dogs and schizonts were observed in the spleen and bone marrow of the fifth. antibodies reactive with h. canis gametocytes were detected by the indirect fluorescent antibody test (ifa), with igm detected in ... | 1998 | 9561714 |
| canine hepatozoonosis in brazil: description of eight naturally occurring cases. | eight cases of canine hepatozoonosis were diagnosed at the veterinary hospital (faculdade de medicina veterinária e zootecnia, universidade estadual paulista, campus de botucatu), between october 1993 and april 1994. clinical signs included anorexia, pale mucous membranes, weight loss, pain, diarrhoea, vomit, gait abnormalities, fever, polyuria and polydipsia. haematologic findings revealed anaemia in seven cases, leucocytosis with neutrophilia in three cases, lymphopenia in three cases and mono ... | 1998 | 9561717 |
| granulomatous hepatitis associated with hepatozoon sp. meronts in a southern water snake (nerodia fasciata pictiventris). | a wild-caught adult female southern water snake (nerodia fasciata pictiventris) did poorly in captivity. a peripheral blood-film examination demonstrated numerous hemogregarines characterized as fusiform nondividing intraerythrocytic gametocytes. xenodiagnostic typing in laboratory-reared mosquitoes demonstrated the parasite to be of the genus hepatozoon. gross and histopathologic examination of the liver demonstrated numerous granulomas centered on groups of one to six hepatozoon sp. meronts, a ... | 1998 | 9638630 |
| survey of tick-borne diseases in dogs infested with rhipicephalus sanguineus at a kennel in okayama prefecture, japan. | serological tests were performed to investigate extent of tick-borne diseases in dogs infested with rhipicephalus sanguineus at a kennel in okayama prefecture. three of 22 dogs (13.6%) were positive for ehrlichia canis. two of 19 dogs (10.5%) were positive for rickettsia japonica. three of 22 dogs (13.6%) were positive for babesia gibsoni. none of these animals were positive for coxiella burnetii or hepatozoon canis. a microfilaria was detected in a drop smear of hemolymph from an engorged femal ... | 1998 | 9673953 |
| ultrastructural features of cystic and merogonic stages of hepatozoon sipedon (apicomplexa: adeleorina) in northern leopard frogs (rana pipiens) and northern water snakes (nerodia sipedon) from ontario, canada. | the cystic and merogonic stages of the haemogregarine hepatozoon sipedon, infecting northern water snakes (nerodia sipedon sipedon) and northern leopard frogs (rana pipiens), respectively, in ontario, canada, were investigated by transmission electron microscopy. cysts, which were observed in the liver of northern leopard frogs (rana pipiens) after these anurans ingested mosquitoes (culex pipiens) containing oocysts of the parasite, harboured two cystozoites, each of which contained a large crys ... | 1998 | 9703677 |
| the life history and host specificity of hepatozoon clamatae (apicomplexa: adeleorina) and its-1 nucleotide sequence variation of hepatozoon species of frogs and mosquitoes from ontario. | the life cycle of an intraerythrocytic hemogregarine, hepatozoon clamatae, was studied in green frogs (rana clamitans melanota), bullfrogs (rana catesbeiana), northern leopard frogs (rana pipiens), and in the mosquito, culex territans. gametogenesis, fertilization, and sporogony occurred within cells of the malpighian tubules of laboratory-reared cx. territans that had fed on naturally infected frogs. mature oocysts containing hundreds of sporocysts were observed in mosquitoes 30 days postfeedin ... | 1998 | 9714212 |
| observations on tissue stages of hepatozoon americanum in 19 naturally infected dogs. | lesions and associated tissue stages of hepatozoon americanum in 19 naturally infected dogs are described. schizogony takes place in an unidentified host cell which, during the early stages of the asexual cycle, is contained within a broad, multilamellar mucopolysaccharide 'cyst.' material forming the cyst appears to be host-derived. an intense inflammatory response follows rupture of the schizont and disintegration of the cyst wall. there is unusually intense angiogenesis associated with the re ... | 1998 | 9786627 |
| hepatozoon species infection in domestic cats: a retrospective study. | hepatozoon sp. is a protozoan parasite of peripheral blood neutrophils in cats. feline hepatozoonosis has been reported infrequently and little is known about the pathogenesis of this infection. in order to further clarify clinicopathological characteristics of hepatozoonosis in domestic cats, a retrospecitve study of hepatozoonosis in cats admitted during 1989-1995 to the hebrew university school of veterinary medicine was conducted. the study population comprised all the cats whose medical rec ... | 1998 | 9806492 |
| experimental transmission of hepatozoon americanum vincent-johnson et al., 1997 to dogs by the gulf coast tick, amblyomma maculatum koch. | experimental transmission of hepatozoon americanum to dogs was attempted with four ixodid ticks, viz., rhipicephalus sanguineus, amblyomma americanum, amblyomma maculatum and dermacentor variabilis. ticks that dogs ingested included some that were laboratory-reared and experimentally fed as nymphs on a dog with naturally occurring hepatozoonosis; other ticks were collected as replete or partially engorged larvae, nymphs and adults from dogs that had hepatozoonosis and natural infestations of tic ... | 1998 | 9877066 |
| light and electron microscope studies of hepatozoon mehlhorni, bashtar et al., 1991 (adeleina, eucoccidiida) naturally infecting the viper echis carinatus. | light and electron microscopy have been used to study blood stages of h. mehlhorni as well as different developmental stages of the parasite within lung tissues of the naturally infected vipers echis carinats captured from siwah oases, egypt. a natural infection rate of 60% was recorded among vipers. two types of meronts were observed within the endothelial cells of the viper's lung. the first type is the small one, produced 6-15 merozoites. the second type is the large one, produced 20-40 meroz ... | 1998 | 9914709 |
| blood parasites of five species of lizards trapped in abha province, saudi arabia. | five species of lizards, agama yemenensis, a. adramitana, chamaeleo chamaeleon, c. calyptratus and acanthodactylus baskinaus were trapped alive from abha province. serological and parasitological examinations of blood revealed antibodies against toxoplasmosis and leishmaniasis. blood films showed hepatozoon spp. the results were discussed with reference to their role as reservoir hosts. | 1998 | 9914710 |
| naturally occurring hepatozoonosis in coyotes from oklahoma. | nine of 16 free-ranging coyotes (canis latrans) from central oklahoma (usa) had naturally acquired infections of hepatozoon americanum. infections were confirmed by recognition of tissue stages closely resembling h. americanum in skeletal and cardiac muscle. at the time coyotes were collected they were infested with a variety of ticks, including adult gulf coast ticks (amblyomma maculatum). we propose that the high prevalence of h. americanum in this small sample of free-ranging coyotes and the ... | 1999 | 10073352 |
| phylogenetic relationships among hepatozoon species from snakes, frogs and mosquitoes of ontario, canada, determined by its-1 nucleotide sequences and life-cycle, morphological and developmental characteristics. | the molecular biological characteristics of hepatozoon species infecting various species of snakes, frogs and mosquitoes were investigated by determining the nucleotide sequences of the first internal transcribed spacer region. a phylogenetic analysis was performed on seven isolates of hepatozoon infecting snakes, including hepatozoon sipedon and four morphologically similar but not identical forms, and two isolates of hepatozoon catesbianae infecting green frogs (rana clamitans melanota). this ... | 1999 | 10221630 |
| canine hepatozoonosis: comparison of lesions and parasites in skeletal muscle of dogs experimentally or naturally infected with hepatozoon americanum. | we report previously undescribed, early lesions in skeletal muscle of dogs experimentally infected with hepatozoon americanum by ingestion of laboratory-reared, infected amblyomma maculatum. the earliest muscle lesion was recognized at the first interval of examination 3 weeks following exposure. the lesion consisted of a large, modified host cell whose cytoplasm frequently contained a demonstrable parasite. in skeletal muscle, the cell was consistently located between muscle fibers or in loose ... | 1999 | 10384901 |
| serosurvey of ehrlichia canis and hepatozoon canis infection in dogs in yamaguchi prefecture, japan. | antibodies to ehrlichia canis and hepatozoon canis in dogs at the animal hospital in yamaguchi university were surveyed and potential risk factors for both pathogens were evaluated. among 430 dogs examined, 20 (4.7%) and 18 (4.2%) dogs showed positive findings for e. canis and h. canis, respectively. neither, sex nor age was associated with the seropositivity of either pathogen, but the positive rate in dogs kept outside was slightly higher than that in dogs kept inside for both pathogens. a hig ... | 1999 | 10563295 |
| sporogonic development of hepatozoon americanum (apicomplexa) in its definitive host, amblyomma maculatum (acarina). | light microscopic observations of the sporogonic development of hepatozoon americanum are described in its acarine host, amblyomma maculatum. laboratory-reared nymphal ticks were fed on 2 dogs infected with h. americanum. nymphal ticks were sampled daily, starting 3 days after being placed on a parasitemic dog, until 18 days after infestation (pi), and then every 3 or 4 days until replete nymphs molted. ticks were examined as unstained wet mounts and hematoxylin-eosin-stained paraffin sections. ... | 1999 | 10647032 |
| naturally occurring and experimentally transmitted hepatozoon americanum in coyotes from oklahoma. | twenty free-ranging coyotes (canis latrans) in oklahoma (usa) were examined for the presence of naturally occurring infections with hepatozoon americanum and to determine if bone lesions attributable to h. americanum were present. although eight of the 20 free-ranging coyotes were found to be naturally infected with h. americanum, no bone lesions were detected. in addition, two coyote pups were exposed to h. americanum oocysts collected from experimentally infected ticks and the course of the re ... | 2000 | 10682757 |
| genetic and antigenic evidence supports the separation of hepatozoon canis and hepatozoon americanum at the species level. | recognition of hepatozoon canis and hepatozoon americanum as distinct species was supported by the results of western immunoblotting of canine anti-h. canis and anti-h. americanum sera against h. canis gamonts. sequence analysis of 368 bases near the 3' end of the 18s rrna gene from each species revealed a pairwise difference of 13.59%. | 2000 | 10699047 |
| the blood parasites of the spiny pocket mouse liomys salvini (thomas, 1893) from costa rica. | a survey of the blood parasites of 20 liomys salvini revealed 3 types of parasites. sixty percent of the mice harbored trypanosoma zeledoni, 5% an unnamed species of hepatozoon, and 20% of the mice were infected with a species of haemobartonella. | 2000 | 10701581 |
| the biology of some intraerythrocytic parasites of fishes, amphibia and reptiles. | fishes, amphibia and reptiles, the ectothermic vertebrates, are hosts for a variety of intraerythrocytic parasites including protists, prokaryotes, viruses and structures of uncertain status. these parasites may experience host temperature fluctuations, host reproductive strategies, population genetics, host habitat and migratory behaviour quite unlike those of endothermic hosts. few blood infections of fishes, amphibia and reptiles have proven pathogenicity, in contrast to the many intraerythro ... | 2000 | 10751939 |
| antigenic analysis of gamonts of hepatozoon canis purified from leukocytes. | hepatozoon canis is a tick-borne apicomplexan parasite of dogs that infects neutrophils and parenchymal tissues. to study the antigenic characteristics of this parasite, a technique was devised for the purification of gamonts from peripheral blood neutrophils. white blood cells were separated on ficoll-hypaque density gradients and the gamonts were released from the host neutrophils by nitrogen cavitation. the blood used for purification originated from dogs with natural or experimental infectio ... | 2000 | 10780547 |
| phylogenetic relationships of hepatozoon (apicomplexa: adeleorina) based on molecular, morphologic, and life-cycle characters. | to evaluate higher-level affinities of hepatozoon species within apicomplexa, we sequenced the 18s rrna gene from 2 parasites (hepatozoon americanum and hepatozoon canis) of dogs and 1 (hepatozoon catesbianae) of bullfrogs. sequences from other apicomplexans among the sarcocystiidae, eimeriidae, theileriidae, plasmodiidae, cryptosporiidae, and babesiidae, a perkinsus species and 2 dinoflagellates were obtained from genbank. phylogenetic analysis indicated that plasmodium, cryptosporidium, and he ... | 2000 | 10780559 |
| skeletal lesions of canine hepatozoonosis caused by hepatozoon americanum. | canine hepatozoonosis, caused by hepatozoon americanum, is an emerging tick-borne disease of dogs in north america. in addition to the skeletal and cardiac myositis that are prominent features of the disease, there is disseminated periosteal bone proliferation in most dogs that manifest clinical disease. each of six experimentally infected animals (four dogs and two coyotes) and seven of eight naturally infected dogs had gross or histopathologic osteoproliferative lesions. experimental animals w ... | 2000 | 10810986 |
| intraerythrocytic development of species of hepatozoon infecting ranid frogs: evidence for convergence of life cycle characteristics among apicomplexans. | intraerythrocytic development of the adeleorin apicomplexans hepatozoon clamatae and hepatozoon catesbianae were investigated in the bullfrog, rana catesbeiana, the green frog, rana clamitans melanota, and the northern leopard frog, rana pipiens. merozoites emerging from hepatic meronts penetrated erythrocytes and underwent 1-3 rounds of binary fission to produce 2-8 merozoites. following their release from infected erythrocytes, individual merozoites entered new cells and transformed into gamon ... | 2000 | 10864239 |
| hepatozoon canis infection associated with dog ticks of rural areas of rio de janeiro state, brazil. | hepatozoon canis is a tick-borne protozoan that infects dogs and has been reported throughout the world. manifestation of h. canis infection varies from being sub-clinical in apparently healthy dogs to severe illness. the main vector of the infection is the dog tick, rhipicephalus sanguineus although other species may also transmit this agent. h. canis has been reported previously in brazil, but mostly as an occasional finding during laboratory exams and always associated with other diseases. th ... | 2001 | 11113545 |
| a survey of hemoparasite infections in free-ranging mammals and reptiles in french guiana. | blood smears of 1,353 free-ranging mammals (35 species) and 112 reptiles (31 species) from french guiana were examined for hemoparasites. parasites from 3 major groups were recorded: apicomplexa (including hemogregarines, piroplasms, and plasmodium spp.), trypanosomatidae, and filaroidea. fifty percent of the individuals (86% of the species) were infected by parasites from at least 1 group. hemogregarines, identified as hepatozoon sp., infected numerous snakes with high prevalences (30-100%); in ... | 2000 | 11128476 |
| american canine hepatozoonosis. an emerging disease in the new world. | hepatozoon canis was first described from dogs in 1905 in india and rhipicephalus sanguineus was identified as the vector. dogs on the texas gulf coast were recognized in 1978 to have hepatozoonosis, and it was thought that h. canis had entered the new world. later, it was realized that american canine hepatozoonosis (ach) is more debilitating than its old world counterpart, often resulting in death. when the malady and parasite were characterized, a new species, h. americanum, was described, in ... | 2000 | 11193705 |
| factors affecting the component community structure of haemoparasites in bank voles (clethrionomys glareolus) from the mazury lake district region of poland. | the prevalence and abundance of infections with haemoparasites were studied over a 3 year period in clethrionomys glareolus (bank vole, n = 420) sampled from forests in the ne of poland. total species richness was 5 (prevalence = haemobartonella sp. 63.1%, bartonella grahamii 27.4%, hepatozoon erhardovae 31.4%, trypanosoma evotomys 15% and babesia microti 1.0%) with 81.9% of the voles carrying at least 1 species and a mean infracommunity species richness of 1.4. variation in species richness was ... | 2001 | 11197763 |
| the blood parasites of anurans from costa rica with reflections on the taxonomy of their trypanosomes. | during may 1997, specimens of 7 species of anurans, that included 5 phrynohyas venulosa laurenti, 5 rana forreri boulenger, 7 rana vaillanti brucchi, 6 eleutherodactylus fitzingeri schimdt, 4 smilisca baudinii duméril and bibron, 1 leptodactylus melanonotus, and 3 bufo marinus linneaus, from the guanacaste conservation area, costa rica were examined for blood parasites. their hematozoan fauna included intraerythrocytic and intraleukocytic icosahedral viruses, a rickettsia (aegyptianella sp.), 2 ... | 2001 | 11227883 |
| pneumocystosis in wild small mammals from california. | cyst forms of the opportunistic fungal parasite pneumocystis carinii were found in the lungs of 34% of the desert shrew, notiosorex crawfordi (n = 59), 13% of the ornate shrew, sorex ornatus (n = 55), 6% of the dusky-footed wood rat, neotoma fuscipes (n = 16), 2.5% of the california meadow vole, microtus californicus (n = 40), and 50% of the california pocket mouse, chaetodipus californicus (n = 2) caught from southern california between february 1998 and february 2000. cysts were not found in a ... | 2001 | 11310900 |
| comparison of tissue stages of hepatozoon americanum in the dog using immunohistochemical and routine histologic methods. | american canine hepatozoonosis is caused by hepatozoon americanum, a recently described species of apicomplexan protozoan parasite. an immunohistochemical procedure using a polyclonal antibody to sporozoites of h. americanum clearly identified asexual stages of h. americanum in canine striated muscle. the method also detects hepatozoa present in naturally infected coyotes and raccoons and reacts with certain other apicomplexans. use of this immunohistochemical procedure confirms the canine inter ... | 2001 | 11467476 |
| ultrastructure of developmental stages of hemolivia stellata (apicomplexa: haemogregarinidae) in the cane toad bufo marinus and in its vector tick amblyomma rotondatum. | the fine structure of the hemogregarine hemolivia stellata petit, landau, baccam and lainson, 1990 developmental stages in the cane toad bufo marinus l. and the vector tick amblyomma rotondatum koch, 1844 are described. in the liver of the toad, merozoites bound by a pellicle were located free and in the cytoplasm, and young and encased mature polynucleated meronts were located in a parasitophorous vacuole (pv). premature gametocytes in the erythrocytes were bound by a bilayered membranous wall ... | 2001 | 11510993 |
| haemogregarine specificity in two communities of florida snakes, with descriptions of six new species of hepatozoon (apicomplexa: hepatozoidae) and a possible species of haemogregarina (apicomplexa: haemogregarinidae). | five species of snakes in florida, from palm beach county in the south and alachua county 450 km to the north, occur in similar habitat but have distinctive hepatozoon species characteristic of each host species. in palm beach county, diadophis punctatus is host to hepatozoon punctatus n. sp., thamnophis sauritus sackenii to hepatozoon sauritus n. sp., and nerodia fasciata pictiventris to hepatozoon pictiventris n. sp. in alachua county, n. fasciata pictiventris is parasitized by hepatozoon fasc ... | 2001 | 11534655 |
| the life cycle of haemogregarina bigemina (adeleina: haemogregarinidae) in south african hosts. | haemogregarina bigemina laveran et mesnil, 1901 was examined in marine fishes and the gnathiid isopod, gnathia africana barnard, 1914 in south africa. its development in fishes was similar to that described previously for this species. gnathiids taken from fishes with h. bigemina, and prepared sequentially over 28 days post feeding (d.p.f.), contained stages of syzygy, immature and mature oocysts, sporozoites and merozoites of at least three types. sporozoites, often five in number, formed from ... | 2001 | 11699651 |
| larval gulf coast ticks (amblyomma maculatum) [acari: ixodidae] as host for hepatozoon americanum [apicomplexa: adeleorina]. | laboratory-reared larval gulf coast ticks (gcts) (amblyomma maculatum) were exposed experimentally and found to acquire hepatozoon americanum infection while feeding on parasitemic dogs. these ticks supported gamogonic and sporogonic development of the apicomplexan, and oocysts from newly molted nymphs were infectious for a dog. other nymphs from this cohort that were allowed to feed on a blood-parasite naive sheep molted normally; the resulting adult ticks contained oocysts that were infectious ... | 2002 | 11750999 |
| haemogregarines of the genus hepatozoon (apicomplexa: adeleina) in rodents from northern europe. | we studied the prevalence and distribution of hepatozoon infections in small rodents from finland and other areas in northern europe. hepatozoon infections were more common in voles (arvicolinae) than mice (murinae) and more prevalent in voles of the genus clethrionomys than in voles of the genus microtus. transmission electron microscopical examination of hepatozoon erhardovae krampitz, 1964 from bank voles clethrionomys glareolus (schreber) showed that intracellular lung meronts were located i ... | 2001 | 11817449 |
| hepatozoon kisrae n. sp. infecting the lizard agama stellio is transmitted by the tick hyalomma cf. aegyptium. | hepatozoon kisrae n. sp. was found infecting a starred lizard at a site in southeastern samaria, palestine. these lizards were also hosts to the ixodid tick hyalomma cf. aegyptium, which was demonstrated to be the vector of this hemogregarine. hepatozoon and tick infections occurred in lizards within a very restricted locality; at a second site, nearby, ticks occurred without hepatozoon infection. micro- and macromeronts occurred mainly in the lungs, while cyst-like merogonic stages, mainly dizo ... | 2002 | 11938691 |
| analysis of the 18s rrna gene sequence of a hepatozoon detected in two japanese dogs. | partial sequences of the 18s rrna gene (625 bp) from a hepatozoon detected in two canine hepatozoonosis cases, one clinical and one subclinical, in japan were analyzed. both sequences were identical to each other and they were closely related to the hepatozoon canis strain found in israel with 99% (617/625) nucleotide identity. both hepatozoon americanum and hepatozoon catasbianae were distantly related to the japanese hepatozoon with 94% (586/625) and 91% (566/625) identities, respectively. in ... | 2002 | 12062514 |
| hematology, morphology, cytochemical staining, and ultrastuctural characteristics of blood cells in king cobras (ophiophagus hannah). | king cobras (ophiophagus hannah) have been captive-bred at queen saovabha memorial institute since 1996 to supply venom for antivenom production. hematologic tests would be useful for evaluating the health of the snakes, however, basic hematologic data and morphology have not been described for this species. | 2002 | 12189597 |
| hepatozoon species (apicomplexa: hepatozoidae) of the corn snake, elaphe guttata (serpentes: colubridae) and the pigmy rattlesnake, sistrurus miliarius barbouri (serpentes: viperidae) in south florida. | hepatozoon guttata n. sp. is described from the corn snake (elaphe guttata guttata) from south florida. gamonts average 14.6 x 4.6 (13-17 x 3.5-6) and are not recurved, with nucleus situated in the second quarter of the gamont. erythrocyte cytoplasm rarely appears partially dehemoglobinized. the infected cells are usually distorted and are longer than the uninfected erythrocytes but do not differ in width; nuclei are smaller in length and width than those of uninfected cells. sporogony in aedes ... | 2002 | 12197130 |
| the status of haemogregarina mansoni sambon and seligmann from zamenis flagelliformis laurenti. | haemogregarina mansoni sambon and seligmann 1907, a parasite of the coachwhip snake (masticophis flagellum) is redescribed on the basis of sporogonic stages obtained in the experimental vector aedes aegypti and designated as hepatozoon mansoni from hosts collected in north florida. gamonts average 14.7 x 4.7 (13-16 x 4-6) and are not recurved, with nuclei situated in the second quarter of the gamont. erythrocyte cytoplasm is often thin, appearing partially dehemoglobinized, or contracted into a ... | 2002 | 12197131 |
| canine hepatozoonosis: two disease syndromes caused by separate hepatozoon spp. | | 2003 | 12488223 |
| morphologic and morphometric analysis of hepatozoon spp. (apicomplexa, hepatozoidae) of snakes. | hepatozoon species are the most abundant hemoparasites of snakes. its identification has been based mainly on the morphologic characterization of the gamonts in the peripheral blood of the vertebrate host and also of the cysts found in the internal organs of the vertebrate and invertebrate hosts. using a computerized image analysis system, we studied five species of hepatozoon from recently captured snakes in botucatu, state of s o paulo, brazil, to evaluate the importance of the morphology and ... | 2003 | 12563486 |
| characteristics of a hepatozoonosis in lungs of japanese black bears (ursus thibetanus japonicus). | in a survey of pathologic agents in the wild animals of central japan, we found a hepatozoon sp. in the lungs of japanese black bears in fukui, shiga, and gifu prefectures, japan. histopathologic examination of organs and tissues from the 18 bears inspected showed hepatozoonosis in all. immature and mature meronts were found in all lobules and between alveoli, with a few found between pleura and in connective tissue. in the lungs, inflammatory cells were not found around meronts, merozoites, or ... | 2003 | 12679571 |
| development of hepatozoon caimani (carini, 1909) pess a, de biasi & de souza, 1972 in the caiman caiman c. crocodilus, the frog rana catesbeiana and the mosquito culex fatigans. | the sporogony of hepatozoon caimani has been studied, by light microscopy, in the mosquito culex fatigans fed on specimens of the caiman caiman c. crocodilus showing gametocytes in their peripheral blood. sporonts iniciate development in the space between the epithelium of the insect gut and the elastic membrane covering the haemocoele surface of the stomach. sporulating oocysts are clustered on the gut, still invested by the gut surface membrane. fully mature oocysts were first seen 21 days aft ... | 2003 | 12700868 |
| monozoic cysts of hepatozoon canis. | small monozoic cysts found in the spleen of dogs infected with hepatozoon canis are described from naturally and experimentally infected dogs. these forms of h. canis resemble cysts formed by other hepatozoon species that infect frogs, lizards, and grey squirrels as intermediate hosts. the h. canis cyst stage differs in size and morphology from the large cysts of h. americanum, the second hepatozoon species known to infect dogs. | 2003 | 12760658 |
| ultrastructure of hepatozoon boigae (mackerras, 1961) nov. comb. from brown tree snakes, boiga irregularis, from northern australia. | intraerythrocytic bodies identified as haemogregarine gamonts were found in 29% of 97 brown tree snakes (boiga irregularis) examined during a haematological survey of reptiles in australasia during 1994-1998. the morphological characteristics of the parasites were consistent with those of haemogregarina boigae mackerras, 1961, although the gamonts were slightly larger and lacked red caps but contained distinctive polar grey capsules. gamonts did not distend host cells but laterally displaced the ... | 2003 | 12783312 |
| persistence of hepatozoon americanum (apicomplexa: adeleorina) in a naturally infected dog. | to determine the persistence of hepatozoon americanum in a naturally infected dog, skeletal muscle biopsies were performed at approximately 6-mo intervals over a period of 5.5 yr, and the samples were examined for presence of lesions of american canine hepatozoonosis (ach). nymphal amblyomma maculatum (gulf coast tick) were allowed to feed to repletion on the dog periodically over the 5.5-yr period, and adult ticks were dissected and examined for presence of h. americanum oocysts. with 3 excepti ... | 2003 | 12880267 |
| american canine hepatozoonosis. | american canine hepatozoonosis is an emerging, tick-transmitted infection of domestic dogs caused by a recently recognized species of apicomplexan parasite, hepatozoon americanum. the known definitive host of the protozoan is the gulf coast tick, amblyomma maculatum. presently recognized intermediate hosts include the domestic dog and the coyote, canis latrans. laboratory-reared larval or nymphal a. maculatum can be infected readily by feeding to repletion on a parasitemic intermediate host; spo ... | 2003 | 12885206 |
| american canine hepatozoonosis. | hepatozoon americanum infection is an emerging tickborne disease in the southern united states. this organism causes a very different and much more severe disease than does hepatozoon canis, the etiologic agent of canine hepatozoonosis in the rest of the world. h americanum is transmitted through ingestion of the definitive host, amblyomma maculatum (the gulf coast tick). clinical signs of american canine hepatozoonosis tend to wax and wane over time and may include lameness, weakness, pain, mus ... | 2003 | 12910749 |
| hepatozoon griseisciuri in grey squirrels (sciurus carolinensis): changes of blood leucocyte numbers resulting from infection. | numbers of leucocytes in squirrels with gametocytes of hepatozoon in their blood (infected) were compared with animals without gametocytes (uninfected). typical values for leucocytes/mm3 blood in uninfected squirrels were: leucocytes 5.7 x 10(3), granulocytes 3.4 x 10(3), lymphocytes 2.0 x 10(3) and monocytes 0.3 x 10(3) cells. infection caused an increase in monocytes, lymphocytes and granulocytes, and there was a significant positive association between parasitaemia level and numbers of both t ... | 2003 | 12954012 |
| ultrastructural studies on the sporogony of hepatozoon spp. in culex quinquefasciatus say, 1823 fed on infected caiman crocodilus and boa constrictor from northern brazil. | laboratory reared culex quinquefasciatus say, 1823 originating from the vicinity of belem, in northern brazil, were allowed to engorge on caimans (caiman c. crocodilus) infected with hepatozoon caimani (carini, 1909) and boas (boa constrictor) infected with h. cf. terzii (sambon and seligmann, 1907) both from para state. engorged mosquitoes killed on successive days post-feeding (p.f.) were studied by transmission electron microscopy. images of oocysts from 13 days p.f., caiman-fed mosquitoes we ... | 2003 | 12954016 |
| [hepatozoon in epimys rattus frugivorus in haut-oubangui (f.e.a.)]. | | 1956 | 13329770 |
| hepatozoon griseisciuri n. sp.; a new species of hepatozoon from the grey squirrel (sciurus carolinensis gmelin, 1788), with studies on the life cycle. | | 1958 | 13526069 |
| the vector of hepatozoon sciuri. | | 1958 | 13600865 |
| [on the presence and behavior of hemococcidia of the genus hepatozoon miller 1908 (protozoa, adeleidea) in middle and southern european mammals]. | | 1964 | 14200615 |
| [a case of mixed infestation with hepatozoon canis(james 1905) and leishmania "canis" in a dog from s'ete (h'erault)]. | | 1964 | 14220583 |
| american canine hepatozoonosis. | american canine hepatozoonosis (ach) is a tick-borne disease that is spreading in the southeastern and south-central united states. characterized by marked leukocytosis and periosteal bone proliferation, ach is very debilitating and often fatal. dogs acquire infection by ingesting nymphal or adult gulf coast ticks (amblyomma maculatum) that, in a previous life stage, ingested the parasite in a blood meal taken from some vertebrate intermediate host. ach is caused by the apicomplexan hepatozoon a ... | 2003 | 14557294 |
| hepatozoon spp.: report of some cases in dogs in brasília, brazil. | canine hepatozoonosis is a disease caused by the tick-borne protozoan hepatozoon spp. it has been reported in the united states, southern europe, the middle east, africa and the far east. in brazil, canine hepatozoonosis is an emerging protozoal tick-borne disease, and is characterized by distinct clinical signs. the objective of this study was to analyze the laboratory findings of some hepatozoonosis cases in dogs in brasília, brazil, and their clinical signs. the animals of this experiment sho ... | 2003 | 14729172 |
| a serosurvey of hepatozoon canis and ehrlichia canis antibodies in wild red foxes (vulpes vulpes) from israel. | a seroepidemiological survey was conducted to investigate the prevalence of antibodies reactive with ehrlichia canis and hepatozoon canis antigens in free-ranging red foxes (vulpes vulpes) in israel. of 84 fox sera assayed, 36% were seropositive for e. canis by the indirect fluorescent antibody (ifa) test and 24% were positive for h. canis using an enzyme-linked immunosrbent assay (elisa). canine ehrlichiosis and hepatozoonosis appear to be endemic in the wild red fox populations in israel, and ... | 2004 | 15036573 |
| comparison of various staining procedures in the identification of hepatozoon canis gamonts. | the staining characteristics of gamonts of hepatozoon canis in peripheral blood smears were evaluated. three stains, diff-quik stain, giemsa stain and a modification of the naphthol-asd-chloroacetate esterase stain, were compared. the staining characteristics of the infected cell and the parasite were different in each stain used. the modified naphthol-asd-chloroacetate esterase stain showed the most difference between the infected and noninfected cells, as well as a difference in staining chara ... | 1988 | 15162330 |
| hepatozoon sauritus: a polytopic hemogregarine of three genera and four species of snakes in north florida, with specific identity verified from genome analysis. | hemogregarines from thamnophis s. sirtalis, coluber constrictor priapus, elaphe obsoleta quadrivittata, and e. g. guttara in northern florida appeared to be conspecific on the basis of similar gamonts from all the hosts and sporogonic stages obtained from 3 hosts. the resemblance of gamonts to those of hepatozoon sauritus, described from t. sauritus sackenii in southern florida, justified comparison of dna isolates from the type infection of h. sauritus with samples from each of the northern flo ... | 2004 | 15165059 |
| an enzyme-linked immunosorbent assay for antibodies to hepatozoon canis. | canine hepatozoonosis is a tick-borne protozoal disease caused in the old world and south america by hepatozoon canis. an enzyme-linked immunosorbent assay (elisa) using purified h. canis gamont antigen was applied for the detection of antibodies reactive with h. canis. evaluation of the elisa with sera from naturally infected parasitemic dogs indicated that it was sensitive (86%), specific (97%), and comparable to the indirect fluorescent antibody test (ifat) for the detection of h. canis antib ... | 2004 | 15177718 |
| high prevalence of hepatozoon spp. (apicomplexa, hepatozoidae) infection in water pythons (liasis fuscus) from tropical australia. | molecular methods were used to identify blood parasites frequently observed in blood smears of water pythons (liasis fuscus) captured in our study area in the northern territory of australia. a nested polymerase chain reaction (pcr) using primers amplifying the 18s ribosomal rna (rrna) nuclear gene resulted in a short pcr product (180 bp) matching this region in the genus hepatozoon. however, because of the short sequence obtained. 2 new primers were designed based on 18s rrna sequences of 3 hep ... | 2004 | 15270125 |
| tissue stages of hepatozoon canis in naturally infected dogs from sao paulo state, brazil. | a total of 222 dogs were examined by blood smear examination and hepatozoon canis infection was detected in 13 dogs (5.9%). five h. canis-infected dogs were necropsied to observe tissue stages in the organs. fragments of spleen, liver, lungs, heart, kidneys, lymph nodes, bone marrow and skeletal muscles were used to made touch-impression smears. no macroscopic lesions were found in the organs. two dogs had gamonts within polymorphonuclear cells and schizonts in various stages of development with ... | 2004 | 15338284 |
| mixed ehrlichia canis, hepatozoon canis, and presumptive anaplasma phagocytophilum infection in a dog. | a 5-month-old, female, mongrel dog was admitted to the clinic of companion animal medicine, aristotle university of thessaloniki, greece, with depression, anorexia, fever, peripheral lymphadenopathy, splenomegaly, oculonasal discharge, nonregenerative anemia, and mild thrombocytopenia. cytology of giemsa-stained buffy coat, bone marrow, and lymph node aspiration smears revealed numerous morulae in mononuclear leukocytes and in neutrophils, and hepatozoon canis gamonts in neutrophils. the dog was ... | 2004 | 15570564 |
| [evolutionary complication of life cycles in coccidea (sporozoa: coccidea)]. | similar strategies to preserve a species were evolved independently in different groups of coccidea. polyenergid oocysts and tissue cysts are found in representatives of the orders protococcidiida and eimeriida. hypnozoits are found in karyolysus lacerate and plasmodium vivax; transovarial transmission of parasites occurs in life cycles of coccidea of the genera karyolysis and babesia. formation of heteroxenity in groups of coccidea apparently was developed by different ways and in different per ... | 2004 | 15656095 |
| [detection of hemogregarin of the genus hepatozoon in patients in russia]. | | 2004 | 15689126 |
| myocarditis and myositis due to infection with hepatozoon species in pine martens (martes martes) in scotland. | postmortem examinations of four pine martens which had died as a result of road accidents in scotland revealed focal, granulomatous lesions in the heart and skeletal muscles of three of them. an immunoperoxidase staining technique showed that the lesions were due to infection with hepatozoon species. a pcr-based assay was used to confirm the presence of hepatozoon dna in the infected tissues. the nucleotide base sequence of the pcr products suggested that the infecting organism was probably a ne ... | 2005 | 15828725 |
| anti-hepatozoon canis serum antibodies and gamonts in naturally-occurring canine monocytic ehrlichiosis. | the prevalence of igg antibodies to hepatozoon canis and the presence of gamonts in the blood and hemolymphatic tissues were studied in dogs with canine monocytic ehrlichiosis (cme) caused by ehrlichia canis. both pathogens are transmitted by the tick rhipicephalus sanguineus. forty-five out of 69 (65.2%) dogs with cme were seropositive to h. canis by an enzyme-linked immunosorbent assay (elisa). intra-neutrophilic gamonts of h. canis were found in 2 out of 69 dogs (2.9%) comprising 4.5% of the ... | 2005 | 15845277 |
| two additional hepatozoon species (apicomplexa: hepatozoidae) from the southern black racer, coluber constrictor priapus (serpentes: colubridae), in northern florida. | hepatozoon priapus n. sp. from coluber constrictor priapus has robust gamonts with broadly rounded ends, 18.0 x 4.2 microm (17.0-20.0 x 3.5-6.0), with lw 76.4 microm2 (59-105) and l/w 4.31 (2.9-5.4). the nucleus is always present in second quarter of gamont, seldom extend into first quarter but often into third quarter, 6.0 x 3.0 (5.0-7.0 x 2.5-4.0), with lw 17.9 (13.7-21.0). erythrocyte cytoplasm is always thin, appearing dehemoglobinized, with infected cells always distorted. infected erythroc ... | 2005 | 15856888 |
| distinction between hepatozoon canis and hepatozoon americanum. | | 2005 | 15881994 |
| ectoparasite and hemoparasite infection in a diverse temperate lizard assemblage at macraes flat, south island, new zealand. | a lizard assemblage at macraes flat, new zealand, comprising the common skinks oligosoma maccanni and oligosoma nigriplantare polychroma, the endangered species oligosoma grande and oligosoma otagense, and the common gecko hoplodactylus maculatus, was studied to determine the prevalence of ectoparasites and hemoparasites. the mites odontacarus lygosomae and ophionyssus scincorum infected all oligosoma spp. only, and the mite neotrombicula naultini infected only h. maculatus. the hemoparasite hep ... | 2004 | 15715216 |
| molecular identification and characterization of canine hepatozoon species from brazil. | canine hepatozoon species from brazil was molecular identified and characterized for the first time. from 31 dogs, 7 were positive for blood smear examination and 21 positive for pcr. partial sequences of the 18s rrna gene from eight naturally infected dogs were analyzed. sequences revealed that brazilian hepatozoon is closely related with the japanese hepatozoon, that has 99% nucleotide identity with hepatozoon canis from israel, and different from hepatozoon americanum. these results indicate ... | 2005 | 15948009 |
| epizootiology of blood parasites in an australian lizard: a mark-recapture study of a natural population. | the dynamics of a naturally endemic blood parasite (hepatozoon hinuliae) were studied in a lizard (eulamprus quoyii) host population, using 2 years of longitudinal data. we investigated how parasite abundance in the population varied over time, examined whether certain host sub-populations were more prone to infection, and compared parasite loads in relation to host reproductive behaviour. we recorded blood parasite infections of 331 individuals, obtained in 593 captures. prevalence (the proport ... | 2004 | 15619511 |
| seasonal variation of hepatozoon spp. (apicomplexa, hepatozoidae) parasitemia from boa constrictor amarali (serpentes, boidae) and hydrodynastes gigas (serpentes, colubridae). | the aim of this study was to evaluate the parasitemia variation of three hepatozoon species in brazilian snakes. this study was conducted between 2001 and 2003 and included hepatozoon terzii from boa constrictor amarali, and hepatozoon migonei and hepatozoon cyclagrasi from hydrodynastes gigas. it was observed that the parasitemia tended to decrease in all three hepatozoon species but the parasites were not eliminated. this data suggest that hepatozoon infection may be similar to toxoplasma gond ... | 2005 | 15999279 |
| diagnosis of hepatozoon spp. in amblyomma ovale and its experimental transmission in domestic dogs in brazil. | transmission of hepatozoon spp. to dogs was investigated using four species of ixodid ticks: rhipicephalus sanguineus, amblyomma aureolatum, amblyomma ovale and amblyomma cajennense. we collected completely or partially engorged adult ticks of these species from dogs that were naturally infested and positive for hepatozoon spp. we selected some of these ixodids and inoculated them orally in four negative dogs. the other ticks were dissected and examined for oocysts. of all dogs inoculated orally ... | 2005 | 16081219 |
| clinical hepatozoon canis infection in a dog in turkey. | a five-year-old female dog was presented with a four-week history of inappetence, weight loss, and skin and gait abnormalities. physical examination revealed weakness, depression, incoordination of the posterior limbs, emaciation, skin and hair coat alterations, peripheral lymphadenopathy, pale mucous membranes and fever. laboratory analysis of samples revealed abnormalities which included anaemia, neutrophilic leucocytosis, thrombocytopenia, low serum glucose and albumin concentrations, and inc ... | 2004 | 15600273 |
| old pythons stay fit; effects of haematozoan infections on life history traits of a large tropical predator. | we document the impact of blood parasite infections caused by hepatozoon sp. on water python (liasis fuscus) life history traits such as growth rates, condition, reproductive output and survival. individual snakes maintained similar among-year parasite loads. hepatozoon infections affected python growth rate, i.e. snakes suffering from high infection levels exhibited significantly slower growth compared to individuals with low parasite loads. our results suggest that the parasites also affected ... | 2005 | 15517406 |
| canine inflammatory myopathies: a clinicopathologic review of 200 cases. | a retrospective study was performed on 200 randomly selected cases of inflammatory myopathy in dogs from diagnostic muscle biopsies received at the comparative neuromuscular laboratory, university of california, san diego. the most common clinical signs in dogs diagnosed with an inflammatory myopathy were generalized weakness, stilted gait, dysphagia, masticatory or generalized muscle atrophy, inability to open the jaw, megaesophagus, and dysphonia. myalgia was rarely described. age of onset ran ... | 2004 | 15515585 |
| detection of babesia canis rossi, b. canis vogeli, and hepatozoon canis in dogs in a village of eastern sudan by using a screening pcr and sequencing methodologies. | babesia and hepatozoon infections of dogs in a village of eastern sudan were analyzed by using a single pcr and sequencing. among 78 dogs, 5 were infected with babesia canis rossi and 2 others were infected with b. canis vogeli. thirty-three dogs were positive for hepatozoon. hepatozoon canis was detected by sequence analysis. | 2005 | 16275954 |
| double gametocyte infections in apicomplexan parasites of birds and reptiles. | the simultaneous occurrence of male and female gametocytes inside a single host blood cell has been suggested to enhance apicomplexan transmission ["double gametocyte infection (dgi) hypothesis"]. we did a bibliographic search and a direct screen of blood smears from wild birds and reptiles to answer, for the first time, how common are these infections in the wild. taking these two approaches together, we report here cases of dgis in plasmodium, haemoproteus, leucocytozoon and hepatozoon, and ca ... | 2004 | 15316772 |
| the first report of hepatozoon spp. (apicomplexa, hepatozoidae) in domestic cats from são paulo state, brazil. | hepatozoon sp. was diagnosed in three naturally infected cats from são paulo state, brazil. the first animal was admitted to the veterinary clinic with renal failure. during the hematological examination, gamonts of hepatozoon sp. were observed within polymorphonuclear cells. another two cats, which lived in the same house as the first cat, were also positive for this hemoparasite. this is the first report of a hepatozoon sp. infection in domestic cats from brazil. | 2004 | 15290247 |
| factors affecting the component community structure of haemoparasites in common voles ( microtus arvalis) from the mazury lake district region of poland. | the prevalence and abundance of infections with haemoparasites were studied over a 4-year period in microtus arvalis (common vole, n =321) sampled from fallow grassland sites in north-eastern poland. total species richness was five (prevalence= haemobartonella sp. 63.9%, bartonella spp. 27.7%, babesia microti 9.0%, trypanosoma sp. 8.4% and and hepatozoon lavieri 3.1%) with 76.9% of the voles carrying at least one species and a mean infracommunity species richness of 1.1. variation in species ric ... | 2004 | 14714180 |
| culex neavei theobald, as a possible transmitter of hepatozoon matruhensis to the egyptian snake psammophis schokari. | stained smears of culex neavei females infected with hepattozoon matruhensis from psammophis schokari and kept at 20 +/- 1 degrees c showed the complete developmental stages of the parasite. however, no detection of sporozoites was monitored when females were kept at 30 +/- 1 degrees c. a successful infection of p. schokari was carried out in the laboratory by c. neavei bites. the effect of infection on the mosquito longevity was insignificant (p>0.05) under low temperature and highly significan ... | 2006 | 16605095 |
| laboratory studies on the possibility of culex (culex) pipiens l. to harbour and transmit hepatozoon matruhensis to the egyptian snake psammophis schokari. | a successful experimental infection of psammophis schokari snake with hepatozoon matruhensis through culex (culex) pipiens bites was carried out under laboratory condition of 20 +/- 1 degrees c and 60-70 % r.h. the period monitored for gametocyte maturation ranged from 38 to 42 days while the recorded prepatent period ranged from 28 to 35 days. the effect of infection was nonsignificant on longevity, incubation period and percenttage of egg hatching (p>0.05). meanwhile a significant increase (p< ... | 2006 | 16605113 |
| studies on some biological aspects of culex pipiens and culex quinquefasciatus (diptera: culicidae) infected with hepatozoon sp. harboured by the saudian lizard uromastyx microlepis. | laboratory observations revealed that both c. pipiens and c. quinquefasciatus could harbour the parasitic hepatozoon, while only cx. pipiens succeeded to induce infection to the recipient lizard uromastyx microlepis. a significant reduction in egg production together with a significant increase in the pre-oviposition period of c. pipiens was recorded. incubation period and percentage of egg hatching showed no significant changes. infection had no effect on the reproductive fitness of c. quinquef ... | 2006 | 16605114 |
| description of the gamonts of a small species of hepatozoon sp. (apicomplexa, hepatozoidae) found in crotalus durissus terrificus (serpentes, viperidae). | a small species of the genus hepatozoon found in a specimen of crotalus durissus terrificus from the botucatu region, são paulo state, brazil is described. the morphologic alterations induced in the snake's erythrocytes by the presence of this parasite are described. morphology and morphometric analyses were performed using the qwin lite 2.5 computerized image analysis system (leica). the hepatozoon possessed a small and short body (8.1+/-0.5 microm long and 3.8+/-0.4 microm wide), with round ex ... | 2004 | 14628216 |
| [hepatozoon microti coles, 1914 in small mammals in czechoslovakia]. | | 1955 | 13261203 |
| incidence of trypanosoma lewisi and hepatozoon muris in the norway rat. | | 1952 | 12981595 |
| morphological and molecular characteristics of a species of hepatozoon miller, 1908 (apicomplexa: adeleorina) from the blood of isoodon obesulus (marsupialia: peramelidae) in western australia. | examination of blood films as part of a study to assess the health status of the southern brown bandicoot isoodon obesulus (shaw) in western australia revealed the gamonts of a haemogregarine parasite in some samples, the first to be recognised in a bandicoot in this state. light microscope morphological characteristics and partial sequence of the 18s rrna gene were used to describe these organisms. morphological characters did not differentiate the organism in the current study from previously ... | 2006 | 16758303 |
| the flea, megabothris abantis: an invertebrate host of hepatozoon sp. and a likely definitive host in hepatozoon infections of the montane vole, microtus montanus. | in searching for an invertebrate host for hepatozoon sp. infecting the montane vole (microtus montanus), we collected fleas, ticks, and mites from live-trapped voles and searched squash preparations for hepatozoon oocysts. from 1989 through 1996, we identified six species of fleas in grand teton national park: megabothris abantis, megabothris asio megacolpus, aetheca wagneri, peromyscopsylla selenis, peromyscopsylla. hesperomys, and hystrichopsylla dippiei dippiei. we found hepatozoon oocysts on ... | 2006 | 16870862 |
| hepatozoon kabeenin. sp. (protozoa: apicomplexa; hemogregarina) from the sedge warbler, acrocephalus schoenobaenus (aves: passeriformes). | new species, hepatozoon kabeeni was described in blood of sedge warbler acrocephalus schoenobaenus. the parasite species was detected in two populations of sedge warbler in ne and sw parts of poland. hepatozoon kabeeni was found respectively in 36.0% (n=25) and 28.6% (n=28) of individuals. | 2000 | 16886333 |
| phylogenetic relationships of hepatozoon (haemogregarina) boigae, hepatozoon sp., haemogregarina clelandi and haemoproteus chelodina from australian reptiles to other apicomplexa based on cladistic analyses of ultrastructural and life-cycle characters. | the phylogeny of representative haemozoan species of the phylum apicomplexa was reconstructed by cladistic analyses of ultrastructural and life-cycle characteristics. the analysis incorporated 4 apicomplexans previously not included in phylogenetic reconstructions: haemogregarina clelandi from the brisbane river tortoise (emydura signata), hepatozoon sp. from the slaty grey snake (stegonotus cucullatus), hepatozoon (haemogregarina) boigae from the brown tree snake (boiga irregularis), and haemop ... | 2003 | 12866793 |
| molecular studies on babesia, theileria and hepatozoon in southern europe. part ii. phylogenetic analysis and evolutionary history. | following a study on molecular epizootiology of hepatozoon canis and piroplasmids (babesia spp. and theileria spp.) in southern europe, newly obtained sequences of 18s rrna gene were used for phylogenetic analysis. partial sequences were analysed in isolates showing high degree of homology (>99%) with previous genbank entries: h. canis, b. canis vogeli, b. equi (two isolates, spain1 and spain2), t. annulata and theileria sp. the complete gene sequences were used for b. ovis and b. bovis, that sh ... | 2003 | 12788253 |
| molecular studies on babesia, theileria and hepatozoon in southern europe. part i. epizootiological aspects. | molecular epizootiology of piroplasmids (babesia spp., theileria spp.) and hepatozoon canis was studied in mammals from southern europe (mainly from spain, but also from portugal and france). partial amplification and sequencing of the 18s rrna gene was used for molecular diagnosis. in some particular cases (b. ovis and b. bovis) the complete 18s rrna gene was sequenced. blood samples were taken from domestic animals showing clinical symptoms: 10 dogs, 10 horses, 10 cows, 9 sheep and 1 goat. in ... | 2003 | 12719133 |
| determination of time of onset and location of early skeletal lesions in young dogs experimentally infected with hepatozoon americanum using bone scintigraphy. | canine hepatozoonosis caused by hepatozoon americanum has periosteal proliferation on long bones, pelvis, vertebrae, and skull. the pathogenesis of the periosteal proliferation is unknown but may be similar to hypertrophic osteopathy. objectives were to determine the time frame for onset of bone lesions, to characterize spatial distribution of early bone lesions, and to describe the scintigraphic appearance of bone lesions in six immature dogs infected with 400 h. americanum oocysts on day 0. 99 ... | 2003 | 12620057 |
| transmission of hepatozoon americanum (apicomplexa: adeleorina) by ixodids (acari: ixodidae). | american canine hepatozoonosis (ach) caused by hepatozoon americanum vincent-johnson, macintire, lindsay, lenz, baneth, and shkap is an emerging, often fatal, tick-borne protozoal disease of dogs in the united states of america. dogs acquire infection by ingesting ticks that contain oocysts. to understand the invertebrate (definitive) host range of h. americanum, experiments were carried out using four ixodids, rhipicephalus sanguineus (latreille), dermacentor variabilis say, amblyomma americanu ... | 2002 | 12144294 |
| [high prevalence and diversity of blood parasites of passerine birds in southern turkmenistan]. | thirty nine specimens of passerine birds belonging to 19 species and eight families were investigated by blood smear technique in four localities of southern turkmenistan in 3-18 august 1991. the overall prevalence of infection was 59%. protists from the orders haemosporida (genera haemoproteus, plasmodium, leucocytozoon), kinetoplastida (trypanosoma), and adeleida (hepatozoon), as well as microfilaria were found. haemoproteids (the prevalence of infection is 44%), leucocytozoids (23%), malarial ... | 2001 | 11548579 |