| experimental transmission of the texas strain of hepatozoon canis. | nine dogs were fed hepatozoon canis-exposed rhipicephalus sanguineus ticks; 6 showed clinical signs suggestive of canine hepatozoonosis, and the parasite was found in sections of muscle tissue from 2 of the dogs. schizont-like cysts were found in the skeletal muscle of both infected dogs as were gametocytes in the circulating leucocytes. periosteal new-bone lesions were seen in 1 dog. attempts to infect a raccoon, 3 cats, 6 laboratory mice, and tick- or canine-cells in vitro, failed. | 1984 | 6542719 |
| incidence of brown dog ticks, rhipicephalus sanguineus, at a kennel in okayama prefecture. | twenty two adult dogs suffered from tick infestation at a kennel in okayama prefecture in the summer of 1994. four of them had been introduced from u.s.a. some dogs showed pyoderma, anemia, neutrophilia or eosinophilia. neither babesia gibsoni nor hepatozoon canis was detected on the smear samples of peripheral blood. the ticks detected were morphologically identified as rhipicephalus sanguineus. this case was a rare incidence of the tick in the other areas of japan than okinawa. | 1995 | 7548423 |
| a new hepatozoon species from dogs: description of the causative agent of canine hepatozoonosis in north america. | a new species of adeleina, hepatozoon americanum, is described from the skeletal muscle, cardiac muscle, visceral organs, and blood of dogs (canis familiaris) in the southern united states. the organism was previously identified as hepatozoon canis (james, 1905) wenyon, 1926; however, differences in clinical signs, histopathological and serological findings, gamont size, and ultrastructure define the new species of hepatozoon. attempts to transmit the protozoan from infected dogs to nymphal rhip ... | 1997 | 9406796 |
| [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 |
| 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 |
| 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 |
| 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 |
| transmission of hepatozoon canis to dogs by naturally-fed or percutaneously-injected rhipicephalus sanguineus ticks. | hepatozoon canis is an apicomplexan protozoan parasite of dogs, prevalent in asia, africa, and southern europe. experimental transmission of h. canis to dogs was performed with laboratory-reared rhipicephalus sanguineus nymphs that fed on a naturally infected dog or were percutaneously injected with canine blood containing h. canis gamonts. dogs were inoculated by oral ingestion of adult ticks containing h. canis oocysts. transstadial transmission of h. canis was recorded, whereas transovarial t ... | 2001 | 11426725 |
| 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 |
| dogs with hepatozoon canis respond to the oxidative stress by increased production of glutathione and nitric oxide. | 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 turkey, canine hepatozoonosis was reported for the first time in 1933. in the present study, serum glutathione (gsh), malondialdehyde (mda), nitric oxide (no) and ceruloplasmin levels were analysed in 14 dogs infected with hepatozoon canis as well as in 10 healthy dogs. blood smears were prepared from periph ... | 2005 | 15936891 |
| 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 |
| life cycle of hepatozoon canis (apicomplexa: adeleorina: hepatozoidae) in the tick rhipicephalus sanguineus and domestic dog (canis familiaris). | the life cycle of the apicomplexan protozoon hepatozoon canis in its natural hosts rhipicephalus sanguineus (tick) and canis familiaris (domestic dog) was studied in an experimental infection. tick nymphs were fed on a naturally infected dog, or they were infected by percutaneous injection of blood. dogs were inoculated by ingestion of adult ticks containing mature oocysts. gamonts were in syzygy 24 hr after percutaneous injection of ticks. early oocysts were detected 96 hr after nymph repletion ... | 2007 | 17539411 |
| hepatozoon canis infection in slovakia: imported or autochthonous? | tissue samples from nine red foxes (four samples of striated muscle tissue and five samples of heart tissue) that originated from the michalovce district (slovakia), an area with endemic occurrence of canine babesiosis were examined by pcr method using primers amplifying a fragment of the 18s rrna spanning the v4 region of babesia and theileria. an unexpected determination of 450 bp dna fragment of hepatozoon canis was found in four samples. partial sequences of the 18s rrna gene from the h. can ... | 2007 | 17627439 |
| prevalence of ehrlichia canis, anaplasma platys, babesia canis vogeli, hepatozoon canis, bartonella vinsonii berkhoffii, and rickettsia spp. in dogs from grenada. | to identify the tick-borne pathogens in dogs from grenada, we conducted a serologic survey for ehrlichia canis in 2004 (104 dogs) and a comprehensive serologic and molecular survey for a variety of tick-borne pathogens in 2006 (73 dogs). in 2004 and 2006, 44 and 32 dogs (42.3% and 43.8%) were seropositive for e. canis, respectively. in 2006, several tick-borne pathogens were identified by serology and pcr. dna of e. canis, anaplasma platys, babesia canis vogeli, hepatozoon canis, and bartonella ... | 2008 | 18160223 |
| molecular and parasitological survey of hepatozoon canis (apicomplexa: hepatozoidae) in dogs from rural area of sao paulo state, brazil. | hepatozoon canis is a protozoan that infects dogs and is transmitted by the ingestion of the brown dog tick, rhipicephalus sanguineus. two distinct species of hepatozoon genus can infect dogs, h. canis and h. americanum. routine tests to detect the disease are based on direct examination of gametocytes on giemsa-stained blood smears. the objectives of this study were the investigation of infection prevalence in rural area dogs, the comparison of diagnostics by blood smear examination and polymer ... | 2008 | 18188597 |
| new developments in canine hepatozoonosis in north america: a review. | abstract : canine hepatozoonosis is caused by hepatozoon canis and hepatozoon americanum, apicomplexan parasites transmitted to dogs by ingestion of infectious stages. although the two agents are phylogenetically related, specific aspects, including characteristics of clinical disease and the natural history of the parasites themselves, differ between the two species. until recently, h. canis infections had not been clearly documented in north america, and autochthonous infection with h. america ... | 2009 | 19426444 |
| hepatozoon canis infecting dogs in the state of espírito santo, southeastern brazil. | from may 2007 to march 2008, blood samples were collected from 92 healthy dogs living in 21 households (17 farms in rural area, and 4 homes in urban area) in 6 counties of the state of espírito santo, southeastern brazil. in addition, ticks were collected from these dogs. a mean of 4.4+/-3.0 dogs (range: 1-12) were sampled per household; 78 and 14 dogs were from rural and urban areas, respectively. polymerase chain reaction (pcr) designed to amplify fragments of the 18s rdna gene of babesia spp ... | 2009 | 19482427 |
| ticks and haemoparasites of dogs from praia, cape verde. | in february 2008 an epidemiological field study on arthropod-borne infections in dogs was carried out in praia, the capital city of cape verde. for this purpose 130 dogs were included in the study. of these, 94.6% were infested with ticks. altogether, 1293 ticks of the genus rhipicephalus (in all evaluated cases r. sanguineus) were collected. examination for haemotropic parasites was performed via polymerase chain reaction (pcr). lymph node fine-needle aspirates were screened by pcr for leishman ... | 2009 | 19729247 |
| canine babesiosis in northern portugal and molecular characterization of vector-borne co-infections. | abstract: | 2010 | 20377861 |
| the first report of hepatozoon canis identified in vulpes vulpes and ticks from italy. | this is the first report on the presence of hepatozoon canis in vulpes vulpes in italy. during the years 2005 and 2006, a total of 119 foxes were collected and their spleen tissues were screened by microscopy, polymerase chain reaction, and sequencing. in the same area, 290 ticks were picked off from dogs or collected from the environment. microscopy detected inclusion bodies regarded as belonging to the genus hepatozoon in four samples, whereas molecular diagnostics evidenced 16 foxes (13.4%) a ... | 2010 | 20420538 |
| diagnosis of hepatozoon canis in young dogs by cytology and pcr. | abstract: | 2011 | 21489247 |
| perspectives on canine and feline hepatozoonosis. | two species of hepatozoon are currently known to infect dogs and cause distinct diseases. hepatozoon canis prevalent in africa, asia, southern europe, south america and recently shown to be present also in the usa causes infection mainly of hemolymphoid organs, whereas hepatozoon americanum prevalent in the southeastern usa causes myositis and severe lameness. h. americanum is transmitted by ingestion of the gulf coast tick amblyomma maculatum and also by predation on infected prey. h. canis is ... | 2011 | 21620568 |