Publications

TitleAbstractYear
Filter
PMID
Filter
rocky mountain spotted fever in mississippi: survey for spotted fever antibodies in dogs and for spotted fever group reckettsiae in dog ticks.during epidemiologic studies of rocky mountain spotted fever in mississippi in 1973, dogs were surveyed for antibodies tp spotted fever group antigens and for tick parasites infected with rickettsiae of the spotted fever group. fifty-three (46%) of 116 serum samples had complement-fixing antibody titers greater than or equal to 1:8 as compared to only one (5%) of 21 samples from a group of dogs obtained from metropolitan chicage. fifty-two per cent of the dogs tested from mississippi had microag ...1976814809
rocky mountain spotted fever (tick-borne typhus) in south carolina: an educational program and tick/rickettsial survey in 1973 and 1974.because the incidence of spotted fever is increasing in south carolina, campaigns were carried out in 1973 and 1974 to provide the public and medical practitioners, through pamphlets and news media, with information about spotted fever and the ticks which transmit the causative agent, rickettsia rickettsii. people were also invited to save and submit live ticks removed from vegetation, animals and humans, for examination by the hemolymph test. a total of 1,186 ticks consisting of 987 dermacentor ...1975811127
the brown dog tick rhipicephalus sanguineus and the dog as experimental hosts of ehrlichia canis.adult rhipicephalus sanguineus ticks efficiently transmitted ehrlichia canis to susceptible dogs for 155 days after detachment as engorged nymphs from a dog in the acute phase of ehrlichiosis. adult ticks that had similarly engorged on a dog in the chronic phase of ehrlichiosis failed to transmit e canis to susceptible dogs. infected but unfed adult ticks may be of greater importance than the chronically infected carrier dog as a natural reservoir of e canis.1977596693
[attempts to infect rhipicephalus sanguineus (latr.) ticks with the rabies virus]. 1978672778
rhipicephalus sanguineus: vector of a new spotted fever group rickettsia in the united states.a rickettsia related to but distinct from the spotted fever agent, rickettsia rickettsii, has been detected in 167 (18.9%) of 884 rhipicephalus sanguineus taken off dogs in central and northern mississippi. the organisms could readily be isolated in male meadow voles (microtus pennsylvanicus), where it produced massive infections in the tissues of tunica vaginalis. it was practically nonpathogenic for male guinea pigs, although inoculation of these animals with infected tunica vaginalis of voles ...1975806533
evaluation of the efficacy of fospirate-treated collars against the brown dog tick.experimental tick infestations on dogs were done to determine the initial kill and residual effectiveness of a 15% fospirate-treated plastic colar against the brown dog tick, rhipicephalus sanguineus (latreille). the mean initial kill, determined 4 days after collar application (day 4), was 56.4%. the mean residual effectiveness of fospirate collars on test days 18, 33, 45, 61, 74, 88, and 112 was 89.1, 77.4, 89.5, 78.6, 73.2, 69.0, and 55.0% control, respectively.1976984550
[new faunal and biological observations on ticks in abruzzo].ticks collected during the years 1975-76 in abruzzo (prov. l'aquila and chieti) italy are reported. the following species have been identified: ixodes canisuga, ixodes frontalis, ixodes hexagonus, ixodes ricinus, dermacentor marginatus, haemaphysalis sulcata, rhipicephalus bursa, rhipicephalus sanguineus, hyalomma marginatum. new hosts are: felis catus for ixodes canisuga; scolopax rusticola, motacilla flava, corvus cornix for ixodes frontalis; sciurus vulgaris for haemaphysalis punctata; garrul ...19761032325
the first record of hunterellus hookeri parasitizing rhipicephalus sanguineus in indonesia. 19761025747
tick (acari: ixodidae) attachment cement and salivary gland cells contain similar immunoreactive polypeptides.a specific antiserum (12c) raised to a 90-kda immunogenic component of salivary glands of the tick rhipicephalus appendiculatus recognized similar 90-kda polypeptides from salivary glands of the american dog tick, dermacentor variabilis, and the lone star tick, amblyomma americanum, as well as 70-kda polypeptides in the cement of d. variabilis, a. americanum, and r. sanguineus (brown dog tick). the reduction in size of the polypeptide for these ticks suggests that it is modified in some way duri ...19921495047
possibilities of persistence in new biotopes of ticks imported by birds.survival and development of 6 tick species (hyalomma anatolicum, rhipicephalus sanguineus, haemaphysalis punctata, dermacentor marginatus, d. reticulatus and ixodes ricinus) were studied in 3 groups differing in the range of distribution with respect to the place of importation, as a model for the knowledge of their possible inclusion in the new local biocenosis during transportation by natural hosts.1977852771
extension of the range of rhipicephalus sanguineus in western australia. 19761016172
letter: the brown dog tick (rhipicephalus sanguineus) on an imported dog. 19751060961
[experimental transmission of canine babesiosis (babesia canis) by native german ticks: 1. the brown dog tick (rhipicephalus sanguineus) (author's transl)]. 1979374029
development of ehrlichia canis, causative agent of canine ehrlichiosis, in the tick rhipicephalus sanguineus and its differentiation from a symbiotic rickettsia.certain aspects of the development of ehrlichia canis, causative agent of canine ehrlichiosis (tropical canine pancytopenia) in rhipicephalus sanguineus ticks were studied. it was found that partial feeding of nymphs infected as larvae with e canis was a desirable, if not necessary, preliminary treatment for successful infection of dogs with ground-up ticks. it remains unclear whether feeding increased the number or altered the virulence of ehrlichiae within tick tissues. ehrlichia canis organis ...1976944000
studies of a "new" rickettsiosis "astrakhan" spotted fever.the acute febrile disease with characteristic rash seen in astrakhan region and named as "viral exanthema of unknown etiology" was proved to be a spotted fever group rickettsiosis. serological examination of humans from endemic areas by complement fixation test revealed antibodies to r. conorii, r. akari and strains netsvetaev and ar-74 of r. sibirica in titres from 20 to 640 in sera from ill persons. of 429 sera from healthy persons, 5.1% were serologically positive in a titre of 20-40. the pre ...19911884783
rickettsiae and rickettsioses in portugal.the only rickettsiae recorded in portugal till now were rickettsia conorii and coxiella burnetii. boutonneuse fever is one of the most important transmissible diseases in portugal. though the annual number of cases is not exactly known, it is estimated to be not far from 20,000 in some years. q fever is the other rickettsiosis widely disseminated throughout the country. the serological prevalence and the incidence of those rickettsioses in portugal are presented in this communication. in recent ...19911884782
a survey of ticks on farm animals in libya.thirteen species of ixodid ticks and two species of argasid ticks were collected during a three-year survey of 58 farms in libya. these included boophilus annulatus, b. microplus, b. decoloratus, seven species of hyalomma, rhipicephalus sanguineus, rh. evertsi, rh. bursa, argas persicus and ornithodoros foleyi. this is the first recording of b. microplus, b. decoloratus and rh. bursa in libya. of 20,391 animals examined by random sampling, 2020 (9.6%) had ticks; particularly common were hy. drom ...19921288437
the control of ticks, fleas and lice on dogs by means of a sendran--impregnated collar.plastic collars impregnated with 9,4% sendran effectively controlled adult rhipicephalus sanguineus for a period of 49 days and immature ticks for a period possibly in excess of 70 days when fitted to four dogs. four uncollared dogs served as controls. although flea burdens were extremely low the collars were apparently effective for a period in excess of 70 days. a medicated collar killed all the ticks, fleas and lice on a severely parasited dog within a period of 48 hours.19761263190
preparation of primary cultures of tick cells.primary cell cultures were prepared from preimaginal bodies from the nymphal ticks, rhipicephalus sanguineus, dermacentor andersoni, and amblyomma maculatum, and from the hemocytes of late-stage nymphal and adult ticks, ornithodoros coriaceus. the dissection methods for obtaining preimaginal bodies and hemocytes for culture are described. a culture mediu, designated rml 375, was used for both culture methods. primary cultures were established with minimal contamination. preimaginal body cultures ...1978697169
[control of the brown dog tick rhipicephalus sanguineus l. in houses and stables]. 1979548028
ultrastructure of rickettsia rhipicephali, a new member of the spotted fever group rickettsiae in tissues of the host vector rhipicephalus sanguineus.rickettsia rhipicephali is similar in ultrastructure to r. rickettsii while differing from other rickettsiae of the typhus group and of q fever and others by its lack of a prominently reticulated cytoplasmic matrix and in the thickness of the inner osmophilic layer of the cell wall. in tissues of the tick vector rhipicephalus sanguineus, r. rhipicephali had a mean length and width of 1.2 and 0.46 micrometer, respectively. it possessed a trilaminar cell wall with an adhering capsule-like layer. t ...1979570191
[the brown dog tick rhipicephalus sanguineus (latreille, 1806) in germany, a problem in small animal practice]. 1979548027
epidemiology and control of anaplasmosis in australia.anaplasmosis occurs in those areas of northern and eastern australia infested by the cattle tick boophilus microplus but it has been studied intensively only in queensland. anaplasmosis is predominantly a disease of autumn and winter and of cattle greater than 1 year of age. the complement fixation test has been used in serological surveys of the tick-infested areas of the state. both clinical and subclinical infections occur only in tick-infested areas and they are both more frequent in bos tau ...1979553977
[the experimental transmission of anaplasma marginale by the brown dog tick rhipicephalus sanguineus in australia]. 1979539952
hosts of rhipicephalus sanguineus (acari: ixodidae) in northern mississippi, usa. 1979529267
ectoparasite impacts on gerbillus andersoni allenbyi under natural conditions.to assess ectoparasite impact on individuals and populations of gerbillus andersoni allenbyi under natural conditions, i addressed the following questions. do ectoparasites affect their host fitness and, if so, how? do ectoparasites affect host population level? does this parasite-host interaction support the traditional concept of parasite evolution towards avirulence? for this purpose, host infestation, infection, survival, haematological indices, and physical condition were recorded. a field ...19921641248
rickettsia in texas.since the first reported case in 1941, rocky mountain spotted fever in humans has been reported from many areas of texas, with two major foci, one located in the north-central region and the other in the eastern region of the state. during the period 1979-1988, 421 cases of rmsf were reported, reaching 108 cases in 1983 and declining in subsequent years. statewide surveillance programs to detect spotted fever group rickettsiae in tick populations were initiated in 1976. in recent years, the sfg ...19902378448
[case of mass infestation with mites of genus rhipicephalus sanguineus (latreile, 1806) in a warsaw apartment]. 1979516736
etiologic agent of lyme disease, borrelia burgdorferi, detected in ticks (acari: ixodidae) collected at a focus in alabama.the study was conducted at sites of known transmission of borrelia burgdorferi in east central alabama. the objectives were to determine species of ticks present at these sites, their host associations, and species of ticks and small mammals naturally infected with b. burgdorferi. a total of 451 hosts were examined for ticks, including cotton mice, peromyscus gossypinus (le conte); cotton rats, sigmodon hispidus say & ord; southern short-tailed shrews, blarina carolinensis (bachman); house mice, ...19911941933
ehrlichiosis in wolves, dogs, and wolf-dog crosses.canine ehrlichiosis was diagnosed in wolves, dogs, and wolf-dog crosses at a small zoo in northcentral florida. five of 9 adult canids and all 8 pups confined to a common kennel died as a result of the infection. the epizootic was associated with a massive rhipicephalus sanguineus infestation. hematologic and pathologic findings in an adult wolf-dog cross that died were characteristic of canine ehrlichiosis. that animal and four other canids were seropositive for ehrlichia canis. no deaths occur ...1979521367
transmission of ehrlichia canis to dogs by ticks (rhipicephalus sanguineus).two strains of rhipicephalus sanguineus acquired ehrlichia canis by feeding as either larvae or nymphs on acutely infected dogs and, in subsequent instars, transmitted the agent to normal dogs. three strains of r sanguineus transmitted e canis as adults after their larval and nymphal stages fed on infected dogs. more than 400 adult female ticks were fed on infected dogs as larvae or nymphs or both, but none transmitted e canis transovarially.19751147359
ticks (ixodidae) parasitizing humans in four provinces of north-western argentina.in four provinces of north-western argentina (catamarca, jujuy, salta and tucumán), between march 1976 and march 1990, 514 ticks were found on humans. they were identified as rhipicephalus sanguineus group (1 male), boophilus microplus (6 male, 1 female), amblyomma parvum (9 male, 13 female), a. cajannense (35 male, 30 female, 81 nymphs), a. neumanni (33 male, 41 female, 144 nymphs) and amblyomma spp. (10 nymphs, 110 larvae). most of the ticks were from the phytogeographical region of chaco, one ...19911809248
histamine blocking agent in the salivary gland homogenate of the tick rhipicephalus sanguineus sanguineus. 1977834285
evaluation of devices for removing attached rhipicephalus sanguineus (acari: ixodidae).three types of forceps and a commercially available device, the tick solution, were used to remove adult brown dog ticks, rhipicephalus sanguineus (latreille), from dogs. the tick solution proved least effective at removing ticks, requiring significantly more removal attempts compared with forcep-removal methods. medium-tipped angled forceps provided the best overall performance. other advantages and disadvantages of the devices are discussed.19921404275
changes in lymphatic fluid draining an area of inflammation induced by feeding rhipicephalus sanguineus (acarina: ixodidae) on the dog. 1976940125
predation of ticks of the rhipicephalus sanguineus (latreille, 1806) group and boophilus microplus (canestrini, 1888) (acari: ixodidae) by nothura temminck, 1815 (aves: tinamidae) in salta, argentina. 19911937269
the activity of aspergillus ochraceus (fungi) on replete females of rhipicephalus sanguineus (acari: ixodidae) in natural and experimental conditions.aspergillus ochraceus wilhelm was isolated from rhipicephalus sanguineus (latreille) ticks infected under natural conditions, and developing an illness characterized by absence of oviposition, mummification and death. from the histological sections, it is deduced that a. ochraceus colonized the ticks via the anus, as posterior gut and malpighian tubules are invaded. the experimental inoculation was carried out on replete female ticks; a disease alike to that observed in naturally infected ticks ...19902093613
the temperature and humidity preferences of haemaphysalis longicornis, ixodes holocyclus and rhipicephalus sanguineus (ixodidae): studies on eggs. 1979571858
identification of spotted fever group rickettsiae using polymerase chain reaction and restriction-endonuclease length polymorphism analysis.in order to facilitate the isolation and identification of spotted fever group (sfg) rickettsiae from their tick vectors, we used the centrifugation shell vial technique or traditional isolation procedures and genotypic identification using the restriction fragment length polymorphism analysis of polymerase chain amplified fragments. the presence of rickettsia conorii both in rhipicephalus sanguineus ticks collected in southern france, and in rhipicephalus simus and haemaphysalis leachi from zim ...19921350164
three groups of babesia canis distinguished and a proposal for nomenclature.two stocks of large babesia from dogs originating in france, transmitted by dermacentor reticulatus, two from north africa, having rhipicephalus sanguineus as vector, and one from south africa, transmitted by haemaphysalis leachi, were compared in cross-immunity tests in dogs and in the indirect fluorescent antibody test (ifat). the french and north african stocks did not immunise against the south african one, while the north african stocks did not protect against a french one. the south africa ...19892655263
focus of human parasitism by the brown dog tick, rhipicephalus sanguineus (acari: ixodidae).throughout most of its range, the brown dog tick, rhipicephalus sanguineus (latreille), prefers dogs as a host, but human bites occasionally occur in the mediterranean region and central america; historically, this species has rarely bitten humans in the united states. a focus of 15 human bite cases by this tick is reported from four air force bases located within 200 miles of each other in north central texas and southwestern oklahoma. the sudden appearance of numerous documented bite cases ind ...19892585458
relationships between the rhipicephalus sanguineus complex ecology and mediterranean spotted fever epidemiology in france.the authors examine the epidemiologic features of mediterranean spotted fever in france in light of the bioecological peculiarities of each of the three known member of the rhipicephalus sanguineus tick group (r. sanguineus, r. turanicus, r. pusillus). the results show that r. sanguineus is the main vector. certain aspects of this tick species are of interest: affinity for man, close contact with humans for a long periods, peak of tick population (preimaginal stages) at the same time as the peak ...19902091935
a descriptive study of the canine population in a rural town in southern africa.the health status of a population of dogs (n = 220) from a rural southern african town is described. a cross sectional survey was done to collect the necessary information. all animals examined were mongrels with a mean condition score of 1.93. the oldest dog found in the population was 8 years old. rhipicephalus sanguineus was the dominant tick species encountered on the dogs, echidnophaga gallinacea the dominant flea species, while cordylobia anthropophaga and demodex canis also affected the h ...19911770490
tick-bite fever in zimbabwe. survey of antibodies to rickettsia conorii in man and dogs, and of rickettsia-like organisms in dog ticks.as part of a study of tick-bite fever in zimbabwe, the prevalence of antibodies to rickettsia conorii in dogs and humans was examined. blood samples were obtained from 184 dogs in different parts of the country and tested by indirect immunofluorescence. in all, 150 (82%) were positive at a titre of 1/40 or higher. dogs from the south and east of the country showed very high seroprevalence compared with dogs from the main urban centre, harare. human serum was obtained from blood donors, from peop ...19911887350
isolation by a sensitive centrifugation cell culture system of 52 strains of spotted fever group rickettsiae from ticks collected in france.boutonneuse fever caused by rickettsia conorii is transmitted mainly by the brown dog tick, rhipicephalus sanguineus. we collected 540 ticks in marseille, france, and tried to isolate as many strains of rickettsia as possible. ticks were evaluated for the presence of rickettsia by the hemolymph test and by a new culture system, the centrifugation-shell vial technique. we avoided contamination in the culture system. prior to ticks being submitted to the hemolymph test, they were disinfected. only ...19901696286
[5 cases of mediterranean boutonneuse fever in switzerland].the boutonneuse fever also called marseilles or eruptive mediterranean fever is an common disease in mediterranean area, in africa and indien. rickettsia conorii is the microorganism involved and rhipicephalus sanguineus is the most common vector. in switzerland, this dog's tick don't exist in the nature, but it may be introduced by a dog contaminated elsewhere outside of the country and remain alive in our houses. it the reason why this disease is very uncommon in switzerland. however, it may b ...19873426074
tick information sheet. the brown dog tick. rhipicephalus sanguineus. 19912014631
evaluation of rhipicephalus sanguineus as a potential biologic vector of ehrlichia platys.the brown dog tick, rhipicephalus sanguineus (acari: ixodidae), transmits several diseases among dogs including ehrlichia canis infection. the role of rhipicephalus sanguineus as a biologic vector for e platys, the rickettsial agent of infectious canine cyclic thrombocytopenia, was studied in dogs. laboratory-cultured, pathogen-free nymph ticks were fed to repletion on dogs acutely infected with e platys. tick engorgement coincided with the development of initial parasitemia and thrombocytopenia ...19911952347
borrelia burgdorferi in ticks of the canton tessin (switzerland).in the northern alps it is hard to find an ixodes ricinus population which does not harbour borrelia burgdorferi. the infection rates range from 5 to 34% for adults and nymphs to 3.1% for larvae. this study shows that the infection rates on the southern side of the alps are similar, at 25% for adults, 36.2% for nymphs and 3.2% for larvae. with respect to tick species other than i. ricinus, we did not succeed in finding any spirochetes in dermacentor marginatus, haemaphysalis punctata, ixodes hex ...19902132440
spotted fever rickettsiae in ticks from the northern sinai governate, egypt.a field study was initiated in 1988 to investigate whether spotted fever group rickettsiae occur in geographic areas in egypt that are adjacent to an area in the southern israeli negev that has a defined focus of spotted fever disease. ticks were collected from dogs, sheep, and camels at four study sites in the northern sinai. tick hemolymph was processed for rickettsial detection by staining with fluorescein isothiocyanate-conjugated antibody to rickettsia rickettsii. of the 442 hemolymphs exam ...19921599048
[babesiosis of dogs in germany: epidemiologic case analysis].between january 1987 and february 1990 babesia infections were detected in 320 dogs in germany by means of microscopical and/or serological methods. it was found, that 316 dogs were infected with babesia canis and 4 animals with babesia gibsoni. of the babesia-canis-positive dogs 184 were abroad up to 4 months before diagnosis, mainly in france, spain and italy, but also in hungary, greece, jugoslavia, portugal, morocco, togo, pakistan, sri lanka, malaysia, turkey, romania, austria and the nethe ...19912068714
[new procedures for the elimination of the brown dog tick (rhipicephalus sanguineus l.) without contaminating room air]. 19863536413
additional instances of human parasitism by the brown dog tick (acari: ixodidae).nine cases of humans parasitized by the brown dog tick, rhipicephalus sanguineus (latreille), are reported. eight cases occurred during 1989. seven of the individuals were from an apparent focus of human biting in northern texas and southwestern oklahoma, one case was from san antonio, bexar county, tex., and one case was from homestead air force base, dade county, fla. these cases suggest that the role of r. sanguineus in the transmission of the etiologic agent of canine ehrlichiosis and other ...19902280392
attempted transmission of ehrlichia risticii, causative agent of potomac horse fever, by the ticks, dermacentor variabilis, rhipicephalus sanguineus, ixodes scapularis and amblyomma americanum.dermacentor variabilis, rhipicephalus sanguineus, amblyomma americanum, and ixodes scapularis ticks were investigated for their ability to transmit potomac horse fever. larval and nymphal ticks were exposed to ehrlichia risticii by feeding on mice inoculated with the organism. molted exposed ticks were then allowed to feed on susceptible ponies or mice. no evidence of transmission, either clinically or by detection of antibodies to e. risticii in mice or ponies, was observed for any tick species ...19902307070
parasites of stray dogs in the rabat region, morocco.eighteen parasites were identified from 57 stray dogs from the urban and rural areas of rabat. the prevalence of the species of parasites was: ctenocephalides (c. canis, c. felis) 94.7%, rhipicephalus sanguineus 68.5%, linguatula serrata, babesia canis, isospora canis each 3.5%, toxocara canis 7%, dirofilaria immitis, taenia hydatigena, t. pisiformis each 12.3%, dipetalonema dracunculoides 10.5%, ancylostoma caninum 17.5% echinococcus granulosus 22.8%, toxascaris leonina 33.3%, dipylidium caninu ...19873675044
[the taxonomic aspects of the transmission of the causative agent of lyme disease].according to world literature data 17 species of ixodid ticks have been studied for natural infection with the lyme disease agent. analysis of the data on the level of the infection, transovarial and transphase transmission has shown that main biological vectors of borrelia burgdorferi are the species of the subgenus ixodes s. str. - i. ricinus, i. persulcatus (eurasia), i. dammini, i. pacificus (north america). potential vectors are i. scapularis, i. dentatus, amblyomma americanum, dermacentor ...19902259524
amitraz: a tick and flea repellent and tick detachment drug.a topical formulation of amitraz (mitaban liquid concentrate, the upjohn company, kalamazoo, michigan, u.s.a.) was evaluated as a tick repellent and detachment agent, and flea repellent. the diluted liquid concentrate (250 p.p.m. active drug) was topically applied as a single treatment to dogs; the concentration was identical to the rate recommended for treatment of demodicosis and scabies. brown dog tick (rhipicephalus sanguineus) and american dog tick (dermacentor variabilis) populations were ...19863723659
problems of housing and health of people utilizing the garbage in cairo from the viewpoint of medical entomology.more than 50 arthropod species were found at two dumping-grounds with dwelling-places (mokattam and ezbet el nakhl) in cairo. their importance was evaluated from the epidemiological and epizootological points of view. of primary importance is the great prevalence of the fleas (xenopsylla cheopis) on brown rats (rattus norvegicus), since the rats are in a close contact with people. they are often simultaneously parasitized with another flea species, ctenocephalides felis felis, which is very freq ...19892634080
comparative activity of three repellents against the ticks rhipicephalus sanguineus and argas persicus.the residual repellent activity of n,n-diethylphenyl-acetamide (depa), n,n-diethyl-3-methyl benzamide (deet) and dimethylphthalate (dmp) against the hard tick rhipicephalus sanguineus (latreille) and the soft tick argas persicus (oken) from topical application on rabbits and hens respectively in the laboratory have been studied. it was found that a 25% concentration of deet gave strong repellency (greater than 90%) against larvae and nymphs of r. sanguineus for 15 and 7 days respectively and aga ...19921600227
lack of co-transmission of rickettsia conorii and ehrlichia canis in human beings in the south of france.ehrlichia canis is the agent of canine ehrlichiosis, commonly known as canine tropical pancytopenia. this canine disease is frequent in our area, as is mediterranean spotted fever in humans. recently a few cases of human ehrlichiosis have been described in the usa. the supposed vector of both diseases is rhipicephalus sanguineus. in order to evaluate the co-transmission of these two diseases, we selected 498 human sera positive for r. conorii and tested them for ehrlichia canis. none of them wer ...19892707389
growth of bluetongue and epizootic hemorrhagic disease of deer viruses in poikilothermic cell systems.continuous cell lines from the ticks dermacentor variabilis, d. parumapertus, d. nitens, rhipicephalus sanguineus and r. appendiculatus, the mosquitoes aedes albopictus and culex quinquefasciatus and the african toad xenopus laevis were tested for their ability to replicate bluetongue (bt) and epizootic hemorrhagic disease of deer (ehd) viruses, and for their sensitivity as potential isolation systems. bt serotype 17 grew to peak titers of 10(4.5)-10(7.5) tcid50 ml-1 in all except one of the tic ...19882833002
epidemiology of boutonneuse fever in western sicily. distribution and prevalence of spotted fever group rickettsial infection in dog ticks (rhipicephalus sanguineus).the distribution and prevalence of spotted fever group rickettsial infection in the ixodid dog tick rhipicephalus sanguineus were found to occur at a rate of 19.7% with variation related to geographic and sociooccupational factors. a higher rate of infection was demonstrated in ticks removed from dogs associated with documented cases of boutonneuse fever. the results fit into available clinical and seroepidemiologic data on rickettsia conorii infection in western sicily.19863513550
differential staining of tick chromosomes: techniques for c-banding and silver-staining and karyology of rhipicephalus sanguineus (latreille).a new karyotypic procedure is described for tick chromosomes along with modifications of accepted techniques for c-banding and silver-staining. the staining procedures produce patterns with staining limited to the centromeric regions and the nucleolar organizer regions (nors). the possible reasons for the concordant patterns are discussed based on the staining characteristics of the 2 techniques. the karyotype of rhipicephalus sanguineus possesses 20 acrocentric autosomes with a single pair of n ...19892466974
quantitative studies of host immunoglobulin g in the hemolymph of ticks (acari).a radioimmunoassay was used to measure the concentration of host immunoglobulin g (igg) in the hemolymph of female hard and soft ticks. hyalomma excavatum koch, rhipicephalus sanguineus latreille, ornithodoros tholozani (laboulbene and megnin), and o. moubata (murry) were fed on rabbits immunized with ovalbumin; argas persicus (oken) was fed on chickens immunized with cytochrome 'c.' at 24 h after feeding, the concentration of antiovalbumin igg in the hemolymph was 7 micrograms/ml for h. excavat ...19892769701
[tick bite fever].tick bite fever (boutonneuse fever) is endemic in india, africa and especially the mediterranean countries. it is occasionally "imported" into central european countries by tourists. the exanthematic disease is caused by infection with rickettsia conori, which is usually transmitted by the brown dog tick. a typical primary lesion at the site of the tick's bite is an important diagnostic hint. the treatment of choice are tetracyclines.19873583731
[establishment of rhipicephalus sanguineus (latreille, 1806) inside houses in belgium]. 19863718024
testing acaricide susceptibility of the brown dog tick, rhipicephalus sanguineus (latreille, 1806), with a disposable pipette method. 19734213418
testing acaricide susceptibility of the brown dog tick rhipicephalus sanguineus (latreille, 1806). ii teabag method. 19744220144
introduction of the tick rhipicephalus sanguineus to czechoslovakia: an additional case. 19892767559
seasonal incidence of rhipicephalus sanguineus (lat) (acarina) on a wild host hemiechinus auritus collaris (gray) (insectivora). 19853835182
brown dog tick and periorbital cellulitis. 19863763430
ticks (acari:ixodidae) of the blue and white nile ecosystems in the sudan with particular reference to the rhipicephalus sanguineus group.twenty-four adult ixodid tick species, infesting livestock and some wildlife hosts along the blue and white nile in the sudan, were identified. three species, boophilus geigyi, rhipicephalus camicasi and r. bergeoni, were recorded for the first time from the sudan. tick numbers on indigenous breeds of cattle (bos indicus) were relatively low, ranging between 17.1 and 40.5 per animal. young cattle grazing with the herd carried significantly fewer ticks than older animals. with the exception of b. ...19873331134
ehrlichia canis-related polyarthritis in a dog.ehrlichia canis-related polyarthritis was diagnosed in a 7-month-old boxer. the diagnosis was based on intraneutrophilic morulae found in synovial fluid specimens, thrombocytopenia, a positive result for indirect fluorescent antibody testing for e canis, the presence on the dog of the known vector of e canis infection (rhipicephalus sanguineus), and a favorable response to treatment with tetracycline hydrochloride. the dog has had no recurrence of lameness for 18 months after cessation of treatm ...19863533872
[development of the filaria monanema martini in the epidermis of ixodid ticks].morphological and histological analysis of the larval development of monanema martini, a filaria with skin dwelling microfilariae. the vectors are the hexapod larvae of rhipicephalus sanguineus, r. turanicus and h. truncatum; the filarial infective stages appear during the larval-nymph moult of the vector (11 days at 26 degrees c). this species, and in our opinion the other species of monanema, have a complete development in the epidermis of the ticks. hard-ticks (ixodidae) appear to be the main ...19883400961
epidemiology of boutonneuse fever in western sicily: isolation of spotted fever group rickettsiae from rhipicephalus sanguineus (fam. ixodidae).spotted fever group rickettsiae were isolated from dog ticks (r. sanguineus) removed from dogs in different areas of western sicily.19863951368
[epizootics due to rhipicephalus sanguineus (latreille 1806) in germany]. 19734751659
first case of introduction of the tick rhipicephalus sanguineus to czechoslovakia. 19854007700
transmission of haemobartonella canis by the dog tick, rhipicephalus sanguineus. 19734736045
the possible use of integumentary sense organs as specific diagnostic mean for larvae and nymphs of rhipicephalus sanguineus and rhipicephalus turanicus. 19854093655
integumentary sense organs of adult rhipicephalus sanguineus latreille, 1806. 19854093654
[3 infections by trypanosomes observed in hyalomma detritum, ixodes ricinus and rhipicephalus sanguineus (acarina: ixodidae)]. 19863726517
rhipicephalus sanguineus: sequential histopathology at the host-arthropod interface. 19744846421
fumigants for quarantine control of the adult brown dog tick: laboratory studies. 19734770951
ectoparasitic infestation of dogs in bendel state, nigeria.an investigation into ectoparasitic infestation of different breeds of dogs presented to four veterinary clinics in benin, sapele and auchi in bendel state of nigeria during the period january 1983 to december 1983 is presented. of a total of 820 dogs examined for ectoparasites 246 (30.00%) were infected by ticks, 226 (27.56%) by lice, 212 (25.85%) by fleas and 109 (13.29%) by mites. the species of ectoparasites identified and their prevalence rates were rhipicephalus sanguineus (19.5%), otobius ...19853836217
ixodid tick attacks on man in israel: medical implications.various species of ixodid ticks that have been recorded to attack man were surveyed, and boutonneuse fever caused by rickettsia conorii, which is transmitted in israel by rhipicephalus sanguineus s.l., is reviewed. only in one case were a complement fixation test and exact determination of the species of the tick performed. tick toxicosis and tick paralysis are discussed, and the possibility of human babesiosis and lyme disease or erythema chronicum migrans appearing in israel is considered.19863957641
cytology and cytochemistry of male accessory sex glands in the dog tick, rhipicephalus sanguineus (l.) (acarina: ixodidae). 19853993173
establishment of the tropical dog tick, rhipicephalus sanguineus, in a house in london. 19854035949
neutrophils: their role in the formation of a tick feeding lesion.dogs infested with adtult rhipicephalus sanguineus were given nitrogen mustard to reduce leukocyte numbers. in the treated animals the tick lesions were insignificant, lacking the collagen destruiction found in untreated hosts, bitt the ticks engorged normally. feeding results from tick secretions causing vascitlar trauima and is independent of tissute damage associated with inflammatory responses.19705411168
hormonal rupture of larval diapause in the tick rhipicephalus sanguineus (lat.). 19725045164
insecticides tested for control of nymphal brown dog ticks by the "tea-bag" technique. 19725008960
morphological variability, host range and distribution of ticks of the rhipicephalus sanguineus complex in israël. 19744440994
some criteria and concepts about the taxonomic status of rhipicephalus sanguineus latr. and r. turanicus pomer. & matik. (ixodidae, acarina). 19854056473
mechanical removal of rhipicephalus sanguineus from the dog. 19685691640
comparative changes in external respiration rates of engorged rhipicephalus sanguineus female ticks with age and oviposition in different physical environments. 19685757660
[distribution and biology of tick rhipicephalus sanguineus latr. in the crimea]. 19685734364
[on the occurrence of rhipicephalus sanguineus (latreille 1806) in germany]. 19685756446
anopheles stephensi and toxorhynchites amboinensis: aseptic rearing of mosquito larvae on cultured cells.aseptic larvae of anopheles stephensi and toxorhynchites amboinensis were reared on a continuous cell line (ru tae 12 v) from the mosquito, t. amboinensis, that grew in suspension as multicellular vesicles. surface-sterilized eggs were hatched in a 24-well plate containing 0.2 ml of leibovitz's l-15 medium per well and incubated in a humidified atmosphere. toxorhynchites amboinensis eggs of 36 hr or older were placed singly to assure hatching and avoid cannibalism. hatching rates were over 80%. ...19826129294
isolation of a virus (wad medani) from rhipicephalus sanguineus collected in sudan. 19665901632
[on the tick rhipicephalus sanguineus latr.--the vector of marseilles fever]. 19664241249
rickettsia-like organisms in ticks and antibodies to spotted fever-group rickettsiae in mammals from northern mississippi.studies were conducted from april through august during 1974 and 1975 on 30 randomly selected trapping sites in wall doxey state park, holly springs national forest, and 1.6 km south of the park in marshall county, mississippi to provide information on the occurrence of ticks involved in the maintenance and transmission of spotted fever-group rickettsiae in nature. of 365 animals (14 species) collected, 186 (51%) were parasitized by 4,169 ticks. species of ticks collected included: dermacentor v ...19853923212
Displaying items 1 - 100 of 1724