| isolation of dhori virus from hyalomma marginatum ticks in portugal. | an agent pathogenic for mice was isolated from hyalomma m. marginatum ticks collected from cattle in southern portugal. serologically, the agent was indistinguishable from dhori virus, an antigenically ungrouped virus isolated in india. | 1979 | 85611 |
| parasites of domestic and wild animals in south africa. xiii. the seasonal incidence of adult ticks (acarina: ixodidae) on cattle in the northern transvaal. | ticks were collected over a period of 13 months, at approximately fortnightly intervals, from 6 africaner oxen kept on the farm nylsvley in the naboomspruit district. the 8 species of ixodidae collected were, in order of abundance, rhipicephalus appendiculatus, r. evertsi evertsi, hyalomma marginatum rufipes, h. truncatum, amblyomma hebraeum, r. simus, boophilus decoloratus and ixodes cavipalpus. the relative abundance of adult ticks of these species, their predilection feeding sites and seasona ... | 1979 | 460821 |
| [hyalomma marginatum koch, 1844 (acarina: ixodidae) in poland - an example of transport of southern tick by migratory birds]. | | 1979 | 524891 |
| the life cycle of the tick hyalomma marginatum rufipes koch (acarina: ixodidae) under laboratory conditions. | the life cycle of hyalomma marginatum rufipes koch was studied under laboratory conditions at 26 +/- 1 c. the preoviposition period was 7.1 +/- 0.23 days. the mean (+/- se) number of eggs was 6,867 +/- 2,609 (max. 13,180, min. 3,184). the greatest egg production was recorded on day 3 (avg 1,170 egg/female). the incubation period was 29.3 +/- 2.96 days. the feeding time of larvae and nymphs of this 2-host tick was 22.8 +/- 0.13 days. nymphs producing males weighed less (23.1 +/- 0.748 mg) than th ... | 1978 | 627955 |
| [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 ... | 1976 | 1032325 |
| [influence of temperature and humidity on the reproductive efficiency of ixodes ricinus (linnaeus, 1758) and hyalomma marginatum koch, 1844 (ixodoidea, ixodidae)]. | laboratory studies have been carried out on two species of ticks, i. ricinus and h. marginatum, showing different seasonal activity and different geographical distribution in nature. the purpose of the present study has been to investigate the effect of different combinations of temperature and humidity on the oviposition of i. ricinus and h. marginatum. an index of reproduction efficiency (no. eggs/wt female), established to relate the capacity of the females to produce eggs to their body weigh ... | 1976 | 1032336 |
| arthropod parasites of springbok, gemsbok, kudus, giraffes and burchell's and hartmann's zebras in the etosha and hardap nature reserves, namibia. | a total of 48 springbok, 48 gemsbok, 23 kudus and 6 giraffes were examined for ticks and lice, while 9 burchell's zebras and 6 hartmann's mountain zebras were examined only for ticks. springbok and gemsbok were shot in both the etosha national park in the north and the hardap nature reserve in the south of namibia. all the other animals were shot in the etosha national park. a total of 7 ixodid tick species and 8 lice species were recovered. the springbok carried few ticks. the adults of a rhipi ... | 1992 | 1297955 |
| parasites of domestic and wild animals in south africa. xxxi. adult ixodid ticks on sheep in the cape province and in the orange free state. | four to 10 dorper sheep on each of 12 farms in the cape province and 3 farms in the orange free state were examined for adult ixodid ticks at approximately 2- to 4-weekly intervals over periods varying from 4 to 18 months, commencing during january, february or april 1989. the farms in the cape province were located in the north-west, south-west and south of the province. those in the orange free state were situated in the north-east and in the south. the sheep in the cape province harboured 10 ... | 1992 | 1297957 |
| external morphology of the sperm of hyalomma marginatum (acarina: ixodidae). | mature sperm cells of the tick hyalomma marginatum were studied by means of scanning electron microscopy. the cell tapering end is transformed into a hemispherical structure. the rest of the cell surface is covered by longitudinal cellular processes, at the tip of the tapering end of the sperm cell an invaginated acrosomal canal can be seen. | 1992 | 1431273 |
| the identification of a shared immunogen present in the salivary glands and gut of ixodid and argasid ticks. | the identification of a 70-kda immunogen present in salivary gland extracts of several ixodid species, namely hyalomma truncatum (sweating-sickness-inducing (ss+) and non-inducing (ss-) strains), hyalomma marginatum rufipes and rhipicephalus evertsi evertsi, is reported. the immunogen was identified by western blots using a monoclonal antibody of the igm isotype directed against a 70-kda immunogen present in the salivary glands of (ss-) female h. truncatum ticks. cross-reactivity with the gut of ... | 1992 | 1446571 |
| ultrastructure of symbiont-like microorganisms associated with the sperm of ixodid ticks. | the endospermatophores found in the seminal receptacles of three species of ixodid ticks: hyalomma marginatum, h. dromedarii and amblyomma hebraeum were examined. the seminal receptacles showed the presence of symbiont-like microorganisms in association with the sperm cells. these yeast-like microorganisms represent extracellular symbionts, produced by the male and introduced in the genital system of the female through copulation. the symbionts frequently occur freely in large agglomerations sur ... | 1992 | 1500765 |
| parasites of domestic and wild animals in south africa. xxix. ixodid ticks on hares in the cape province and on hares and red rock rabbits in the orange free state. | one hundred and seventeen scrub hares, lepus saxatilis, were examined for ixodid ticks in various regions of the cape province. they were infested with 18 tick species and the seasonal abundances of the immature stages of amblyomma hebraeum, amblyomma marmoreum, hyalomma marginatum rufipes, rhipicephalus appendiculatus and rhipicephalus glabroscutatum and all stages of rhipicephalus oculatus and the adults of a rhipicephalus sp. (near r. oculatus) were determined. seventy-two scrub hares on 3 fa ... | 1991 | 1780126 |
| [a case of bringing along mediterranean ticks ixodes (ixodes) festai rondelli, 1926 (acari: ixodida: ixodidae) to poland by migrating birds]. | a partly fed female of i. festai was collected from turdus merula l. caught in hel peninsula (southern coast of baltic sea). this species (known only as females) is a parasite of birds, and inhabits western part of the mediterranean area. i. festai is a second species after hyalomma marginatum which probably every spring is transferred by migratory bird into territory of poland. this finding is the first recorded case of transfer of i. festai to poland, therefore the description of female is giv ... | 1991 | 1823490 |
| [morphological anomalies in ticks (acari: ixodida) collected from natural environment]. | among the ticks with morphological anomalies were: argas persicus--fed female with atrophia of the third right leg together with the coxa from the chicken in the hen house (mfakar alsrki--syria); hyalomma marginatum--partly fed female with complete absence of the fourth right leg, was found on a sheep (mfakar alsrki); ixodes ricinus--partly fed female with asymmetry of the body from the roe-deer (popielno, province suwałki); i. i. ricinus--partly fed female with anomaly in shape of the dorsal di ... | 1991 | 1823491 |
| [the virus carriage of ticks, vectors of the causative agent of crimean hemorrhagic fever]. | the study of ixodes ticks collected in astrakhan province in 1982-1987 has revealed spontaneous infection with crimean hemorrhagic fever virus in 4 species. it has been established that a proportion of the infected ck suspensions from the imago hyalomma marginatum marginatum (a back-ground species for the given region) was 3.6% as measured by the method of mouse infection and 8.9% as measured by the enzyme immunoassay. the advantages of the enzyme immunoassay as a method for crimean hemorrhagic ... | 1991 | 1829784 |
| parasites of domestic and wild animals in south africa. xxv. ixodid ticks on sheep in the north-eastern orange free state and in the eastern cape province. | the tick burdens of 115 merino sheep, slaughtered over a period of 15 consecutive months on a farm in the north-eastern orange free state, were determined. a total of 7 ixodid and 1 argasid tick species were recovered and the seasonal abundances of boophilus decoloratus, hyalomma marginatum rufipes, margaropus winthemi and rhipicephalus evertsi evertsi were determined. one hundred and forty-nine merino sheep were slaughtered over periods varying from 10 to 25 months on 3 farms in eastern provinc ... | 1991 | 1923373 |
| parasites of domestic and wild animals in south africa. xxvii. ticks on helmeted guineafowls in the eastern cape province and eastern transvaal lowveld. | seventy-six helmeted guineafowls (numida meleagris) were shot in the andries vosloo kudu reserve and on an adjacent farm in the eastern cape province during the period may 1985 to january 1987 and their tick burdens determined. a total of 10 ixodid tick species were recovered, of which amblyomma hebraeum, amblyomma marmoreum and haemaphysalis silacea were the most abundant. the seasonal abundances of these 3 species and of hyalomma marginatum rufipes were ascertained. a marked difference between ... | 1991 | 1923375 |
| parasites of cattle in the south western orange free state. | a number of young friesian oxen were slaughtered (one at a time) for parasite recovery for 12 consecutive months, from april 1987 to march 1988, on a farm in the fauresmith district of the south western orange free state. a total of 5 ixodid and one argasid tick species, 2 lice species, plus one nematode species and one cestode species, were recovered. peak numbers of adult hyalomma marginatum rufipes were present from november 1987 to february 1988, while the largest numbers of hyalomma truncat ... | 1990 | 2269986 |
| the isolation and transmission of an unidentified babesia sp. to cattle by hyalomma truncatum koch 1844. | an unidentified babesia sp. which causes a mild disease in cattle was isolated in a splenectomized ox that received pooled blood from field cattle. that this organism is pleomorphic and resembles babesia occultans makes it difficult to differentiate between these organisms microscopically. initially, it was suspected that this babesia could be b. occultans. several attempts to transmit this parasite transovarially with hyalomma marginatum rufipes, the vector of b. occultans, failed. continued ef ... | 1990 | 2293131 |
| resistance of brahman and simmentaler cattle to southern african ticks. | field collections of ticks from two breeds of cattle in the north western transvaal showed the common tick species to be rhipicephalus appendiculatus, amblyomma hebraeum, rhipicephalus evertsi evertsi and hyalomma marginatum rufipes. the number of these ticks was higher on simmentaler than on brahman cattle. correlation was found between the number of ticks on the cattle and their serum gamma globulin levels indicating an increase in the production of antibodies. similar correlation was also fou ... | 1990 | 2339000 |
| [ticks and hemoparasitoses of livestock in senegal. iii. the northern sudan area]. | the authors describe the results of a study on ticks and hemoparasitoses of cattle and small ruminants in the senegalese north-sudanian area. for 15 months, 40 bovine, 40 sheep and 40 goats received a routine dipping treatment, aimed at the determination of the tick population dynamics together with an accurate localization of the preferential sites for the different species. the following parasites were collected from the animals: hyalomma marginatum rufipes, h. truncatum, rhipicephalus lunulat ... | 1989 | 2485548 |
| experimental studies on the replication and transmission of crimean-congo hemorrhagic fever virus in some african tick species. | seven african tick species were studied as potential vectors of crimean-congo hemorrhagic fever (cchf) virus. engorged nymphae of 4 ixodid species, hyalomma marginatum rufipes, h. truncatum, rhipicephalus evertsi mimeticus, and amblyomma hebraeum, were inoculated intracoelomically with cchf virus and assayed for virus content at varying times post-inoculation. the virus replicated in all 4 species, reaching maximum titers of 4.6-5.5(10) fluorescence focus units per ml on days 5-9 post-inoculatio ... | 1989 | 2494900 |
| [indication of the antigen to crimean-congo hemorrhagic fever in vector ticks using a solid-phase immunoenzyme technic]. | paper presents the results of a successful use of a solid-phase immunoassay for indication of the antigen of hemorrhagic fever-crimean--congo virus in lays and half-fed female-ticks hyalomma marginatum marginatum koch (1795) collected in endemic area, which adds to our knowledge of this disease focus activity. | 1989 | 2496286 |
| the seasonal abundance of adult ixodid ticks on merino sheep in the south-western orange free state. | with the exception of october, when no collections were made, adult ticks were collected at weekly intervals from february 1986 to january 1987 from 20 randomly selected sheep out of a flock of 60. ixodes rubicundus was the most abundant tick and was present from april to september with a peak during may. hyalomma marginatum rufipes was the next most numerous tick. it was recovered throughout the year with peak burdens being recorded from november to april. small numbers of a rhipicephalus sp. ( ... | 1988 | 3210216 |
| ticks parasitising the indian buffalo (bubalus bubalis) and their possible role in disease transmission. | a total of 13 ixodid tick species, boophilus microplus, haemaphysalis bispinosa, haemaphysalis cornupunctata, haemaphysalis himalaya, heamaphysalis montgomeryi, hyalomma anatolicum anatolicum, hyalomma dromedarii, hyalomma marginatum isaaci, hyalomma (hyalommina) brevipunctata, hyalomma (hyalommina) hussaini, nosomma monstrosum, rhipicephalus haemaphysaloides, and r. turanicus were collected off 424 buffaloes from the northwestern states of india. ten tick species, amblyomma testudinarium, b. mi ... | 1988 | 3369083 |
| an ultrastructural study of the development of babesia occultans in the salivary glands of adult hyalomma marginatum rufipes. | the development of babesia occultans in the salivary glands of adult hyalomma marginatum rufipes was studied with the electron microscope. sporogony involved a process of multiple fission in which sporozoites formed from the periphery of a polymorphous sporont. different stages of development were found concurrently in individual acini as well as within individual acinar cells. mature sporozoites were found on day 3 post-tick attachment and measures 3.0-3.5 x 1.5 micron. the apical complex consi ... | 1988 | 3393374 |
| a comparison of the tick burdens of wild animals in a nature reserve and on an adjacent farm where tick control is practised. | acaricidal treatment of cattle, sheep and goats on a farm in valley bushveld in the grahamstown district resulted in a reduction in the numbers of certain tick species on kudu (tragelaphus strepsiceros), scrub hares (lepus saxatilis) and crowned guinea fowl (numida meleagris) on the same farm. the tick species most severely affected was amblyomma hebraeum, while haemaphysalis silacea, hyalomma marginatum rufipes and rhipicephalus appendiculatus were affected to a lesser extent. rhipicephalus gla ... | 1986 | 3572954 |
| the scrub hare, a reliable indicator of the presence of hyalomma ticks in the cape province. | the host preferences of immature and adult hyalomma marginatum rufipes, hyalomma marginatum turanicum and hyalomma truncatum were studied at various localities in the cape province. the immature stages of all 3 ticks preferred scrub hares (lepus saxatilis) as hosts and were recovered from these animals even when few adult ticks were present on large herbivores in the locality. ground-frequenting birds were also infested, but only with immature h. marginatum rufipes and h. marginatum turanicum. s ... | 1987 | 3612673 |
| parasites of domestic and wild animals in south africa. xviii. the crowned guinea fowl (numida meleagris), an important host of immature ixodid ticks. | the tick burdens of 10 crowned guinea fowl (numida meleagris), shot at approximately 3-monthly intervals in the mountain zebra national park, and of 21 crowned guinea fowl from the andries vosloo kudu reserve, the majority of which were shot at monthly intervals, were determined. no adult ticks were recovered from any of the guinea fowl. the birds in the mountain zebra national park harboured 4 species of ixodid ticks of which amblyomma marmoreum was the most abundant and most prevalent. three b ... | 1986 | 3725331 |
| bahig virus (tete group) in naturally- and transovarially-infected hyalomma marginatum ticks from egypt and italy. | | 1974 | 4441433 |
| isolation of matruh virus from hyalomma marginatum ticks in egypt. | | 1974 | 4469896 |
| on the larva and nymph of hyalomma (hyalomma) marginatum isaaci (sharif, 1928) (acarina: ixodidae). | | 1973 | 4795000 |
| [experimental research on oviposition and hatching of the ova of hyalomma marginatum (koch 1844) (ixodoidea, ixodidae)]. | | 1973 | 4807730 |
| wanowrie virus: a new arbovirus isolated from hyalomma marginatum isaaci. | | 1970 | 4992821 |
| the biology of hyalomma (hyalomma) marginatum isaaci (sharif, 1928) kaiser & hoogstraal, 1963 (acarina: ixodidae). | | 1972 | 5053128 |
| transmission of kyasanur forest disease virus by hyalomma marginatum isaaci. | | 1968 | 5679153 |
| a possible case of host reversal encountered in a single generation of a laboratory colony of hyalomma marginatum isaaci. | | 1968 | 5716485 |
| external warmth as an inducement for host attachment of hyalomma marginatum isaaci. does external warmth induce host attachment in ixodid ticks? research note. | | 1965 | 5833329 |
| infection rates of theileria annulata in the salivary glands of the tick hyalomma marginatum rufipes. | theileria annulata was experimentally transmitted to cattle on two occasions by the two-host tick hyalomma marginatum rufipes. transmission was transstadial; engorged nymphs fed on theileria annulata-infected calves transmitted the disease as adults. salivary glands of all partially fed and incubated adult ticks were heavily infected with theileria parasites. immatures attached rapidly and fed successfully on cattle. however, since the immature stages of this species normally feed on birds, this ... | 1983 | 6415895 |
| crimean-congo hemorrhagic fever in south africa. | crimean-congo hemorrhagic fever virus was isolated for the first time in south africa in february 1981, from the blood of a 13-year-old boy who died in johannesburg after attending a camp in a nature reserve in the western transvaal. virus was isolated from 21/120 pools of questing ticks from the nature reserve, the infected species being hyalomma marginatum rufipes and h. truncatum. virus was also isolated from 4/38 pools of partially engorged ticks and other ectoparasites collected off hosts, ... | 1983 | 6418019 |
| seasonal prevalence of ixodid ticks on cattle in the windhoek district of south west africa/namibia. | the seasonal prevalence of ixodid ticks was determined over a 2-year period by the weekly removal from at least 5 cattle of all adult ticks and the immature stages of rhipicephalus evertsi mimeticus in the ears. the highest mean weekly burden was 286,6 adult ticks/cow/week in march 1979, and the lowest 6,9 adult ticks/cow/week in july 1979. virtually no tick control is practised in this area. rhipicephalus capensis group adults peaked in the summer from october to march/april. rhipicephalus ever ... | 1984 | 6533509 |
| ultrastructural study of spermatogenesis in the tick hyalomma marginatum. | | 1983 | 6631113 |
| relationship between ticks and zebu cattle in southern uganda. | tick populations were observed on zebu (bos indicus) cattle over a period of 2 years at entebbe, uganda where the climate was thought to be highly favourable for the free-living stages of ticks. collections of all instars of ticks were made from the body surfaces of the cattle at intervals of between 1 and 5 weeks. the species recorded in order of decreasing abundance were rhipicephalus appendiculatus, amblyomma variegatum, boophilus decoloratus, rhipicephalus evertsi evertsi, rhipicephalus simu ... | 1982 | 7101465 |
| prevalence of cattle ticks in morocco. | during july 1980 the prevalence of cattle ticks was studied in 4 bioclimatic regions of morocco. all the 24 farms examined were infested. the mean number of ticks per animal varied from 6.5 to 36.3 in different regions. eight species of ticks were identified: hyalomma marginatum, h. detritum, h. lusitanicum, h. anatolicum, boophilus annulatus, rhipicephalus sanguineus, r. turanicus, r. bursa. numerically h. detritum (30.8%) h. marginatum (25.5%) and b. annulatus (29.2%) were most important. the ... | 1982 | 7123663 |
| parasites of domestic and wild animals in south africa. xv. the seasonal prevalence of ectoparasites on impala and cattle in the northern transvaal. | the prevalence of ectoparasites on a total of 36 impala (aepyceros melampus) slaughtered monthly from february 1975 to february 1976 and a total of 24 cattle slaughtered monthly from march 1976 to march 1977 in the nylsvley provincial nature reserve was determined. six species of ixodid ticks were collected from the impala and these, in order of abundance, were: rhipicephalus evertsi evertsi, rhipicephalus appe. diculatus, amblyomma hebraeum, boophilus decoloratus, ixodes cavipalpus and hyalomma ... | 1982 | 7177586 |
| isolation and transmission of an unidentified babesia sp. infective for cattle. | engorged adult female ticks submitted from farms in south africa were routinely screened for protozoan parasites by examination of haemolymph smears. an unidentified babesia sp. was found in hyalomma marginatum rufipes and its transmission to susceptible cattle was achieved both biologically (tick feeding) and mechanically (injection of infected blood). attempts to transmit this species to susceptible rabbits and a horse using similar methods did not produce evidence of infection. this babesia s ... | 1981 | 7335331 |
| studies on a bovine babesia transmitted by hyalomma marginatum rufipes koch, 1844. | a babesia sp. was recently observed in hyalomma marginatum rufipes and found to be transmissible to bovines. further observations were carried out on this parasite and a study made of the morphology of stages in both erythrocytes and tick haemolymph. apart from babesia divergens, intra-erythrocytic parasites were not readily distinguishable from bovine babesia spp. merozoites in tick haemolymph morphologically resembled those of babesia bigemina, but they were significantly larger. this babesia ... | 1981 | 7345388 |
| babesia equi (laveran 1901) 1. development in horses and in lymphocyte culture. | the vertebrate development of babesia equi from infected hyalomma marginatum in morocco was investigated in vitro and in vivo. it was demonstrated that the sporozoites of b. equi initiate a phase of exo-erythrocytic schizogony in lymphocytes both in vitro and in vivo. on the other hand, sporozoites did not invade erythrocytes in vitro. the complete vertebrate life cycle of b. equi was simulated in vitro, from the invasion of lymphocytes by sporozoites, to the development of macro- and microschiz ... | 1981 | 7345686 |
| cattle ticks from the waterberg district of the transvaal. | macroscopically visible ticks were collected from the hides of 28 cattle slaughtered in pairs during a period of 14 months in the waterberg district. in order of prevalence rhipicephalus appendiculatus, rhipicephalus evertsi evertsi, amblyomma hebraeum, hyalomma marginatum rufipes, ixodes cavipalpus, hyalomma truncatum and boophilus decoloratus were recovered. immature stages of the three commonest species constituted a major portion of the population for varying periods during the months april ... | 1980 | 7452655 |
| [parasitic horse ticks in italy. observations on their distribution and pathogenic role]. | the following 13 species of ticks, belonging to ixodidae family, were recorded in italy on horse (equus caballus) since 1931: ixodes ricinus, i. gibbosus, haemaphysalis inermis, h. parva, h. punctata, h. sulcata, dermacentor marginatus, rhipicephalus sanguineus, rh. bursa, rh. turanicus, hyalomma marginatum, hy. detritum, boophilus annulatus. the regional distribution and the role of the species in the transmission of pathogens are reported. | 1994 | 7637997 |
| [crimean-congo hemorrhagic fever in senegal. latest data on the ecology of the cchf virus]. | the authors finalize the knowledge on the ecology of the cchf virus in senegal, west africa. they specify two new major data for the understanding of the viral ecology in west africa. the recognition of a bird species, common and widely distributed in senegal (tockus erythrorhynchus, coraciiformes, bucerotidae), that replicates the virus and infects the immature stages of its current parasite hyalomma marginatum rufipes in more than 90% of the cases, explains why the minimum infection rate of th ... | 1994 | 8003897 |
| experimental transmission of crimean-congo hemorrhagic fever virus by west african wild ground-feeding birds to hyalomma marginatum rufipes ticks. | hyalomma (h.) marginatum rufipes ticks commonly infest birds and are potential vectors of crimean-congo hemorrhagic fever (cchf) virus in west africa. an experimental model for investigating the role of birds in the cchf virus transmission cycle was developed. following cchf virus inoculation, antibodies were detected by enzyme-linked immunosorbent assay in one red-beaked hornbill and one glossy starling, but not in two laughing doves and six domestic chickens. none of the birds showed a detecta ... | 1994 | 8024058 |
| crimean-congo haemorrhagic fever virus infection in birds: field investigations in senegal. | in senegal, wild ground-feeding birds are frequently infested with immature ticks. in two areas where numerous crimean-congo haemorrhagic fever (cchf) virus isolations were obtained from hyalomma marginatum rufipes adult ticks collected on ungulates, 175 birds were captured and sera collected. cchf antibodies were detected by elisa in 6/22 red-beaked hornbills (tockus erythrorhynchus), 2/11 glossy starlings (lamprotornis sp.) and 1/3 guinea fowls. the virus was isolated from h. m. rufipes nymphs ... | 1994 | 8059064 |
| observations on cattle ticks in huila province (angola). | in huila province of angola, 3864 ticks were collected during a parasitological survey carried out in the rainy season from october 1990 to april 1991. the samples were collected from cattle gathered for the annual vaccination campaign against contagious bovine pleuropneumonia, anthrax and blackleg in 18 veterinary stations of six municipalities. after tick classification, the following proportions of ticks were obtained: rhipicephalus evertsi mimeticus (27.1%), amblyomma pomposum (26.4%), booph ... | 1994 | 8171837 |
| geographical distribution, host associations, and vector roles of ticks (acari: ixodidae, argasidae) in sweden. | this review covers the geographic distribution and host relationships of the tick species in sweden. ixodes uriae white, i. caledonicus nuttall, i. unicavatus neumann, i. arboricola schulze & schlottke, and i. lividus koch are ornithophagous species. i. trianguliceps birula, i. canisuga johnston, i. hexagonus leach, and argas vespertilionis (latreille) are mammalophagous. i. ricinus (l.) and haemaphysalis punctata canestrini & fanzago feed on both birds and mammals. all these tick species may be ... | 1994 | 8189415 |
| impact of natural infestation of amblyomma variegatum on the liveweight gain of male gudali cattle in adamawa (cameroon). | the effect of natural tick infestation on the liveweight gain (lwg) of male gudali zebu cattle was studied throughout a year by comparing the performances of two herds, one of which was submitted to weekly acaricidal treatment and the other was left untreated against ticks. six species of ticks were identified on the untreated animals: amblyomma variegatum, boophilus decoloratus, rhipicephalus lunulatus, rhipicephalus turanicus, hyalomma nitidum and hyalomma marginatum rufipes. most of the losse ... | 1993 | 8249253 |
| prevalence of rickettsia-like organisms and spotted fever group rickettsiae in ticks (acari: ixodidae) from zimbabwe. | the prevalence of rickettsia-like organisms in ticks from zimbabwe was determined using the hemolymph test. amblyomma hebraeum had the highest prevalence of rickettsia-like organisms. other species with rickettsia-like organisms included amblyomma sparsum, amblyomma variegatum, hyalomma marginatum rufipes, ripicephalus simus, haemaphysalis leachi, amblyomma rhinocerotis, and hyalomma truncatum. ticks with no demonstrable rickettsia-like organisms infection were boophilus decoloratus, haemaphysal ... | 1995 | 8551500 |
| the role of hyalomma ticks in foot infestations and temporary lameness of sheep in a semi-arid region of south africa. | an outbreak of lameness amongst merino lambs, associated with the presence of hyalomma ticks, was investigated on a farm in the south-western free state, south africa. the purpose was to follow the progress of the condition and to determine the extent of involvement of the two hyalomma species which occur in the region. the flock of experimental sheep (n = 460) ranged free in natural veld under extensive farming conditions. during september and october 1993, adult ewes and lambs in this flock we ... | 1995 | 8628574 |
| attachment preferences of hyalomma truncatum and hyalomma marginatum rufipes ticks (acari: ixodidae) on two sheep breeds. | hyalomma ticks were collected from merino and black-headed dorper sheep and their attachment preferences determined. the preferred site of attachment for hyalomma marginatum rufipes on both dorper and merino sheep was the anogenital and inguinal areas (75-76%). on dorper sheep, h. truncatum attached predominantly to the anogenital and inguinal areas (67.7%). on merino sheep, most adults of this species attached to the feet (26%). almost equal percentages also attached to the anogenital/inguinal ... | 1995 | 8628576 |
| comparison of resistance in three breeds of cattle against african ixodid ticks. | tick resistance in three breeds of cattle, two indigenous breeds (arssi and boran) and one boran x friesian cross-bread, were compared following natural tick infestations at abernossa ranch in ethiopia. the local arssi breed was found to have the highest tick resistance, followed by the boran breed, whereas the boran x friesian was the least resistant. over a period of 12 months, from october 1991 to september 1992, a total of 32,897 ticks composed of four genera were collected from the animals. ... | 1996 | 8665816 |
| the seasonal occurrence of ticks (acari: ixodidae) on sheep and in the field in the judean area of israel. | a 2 year survey of ixodid ticks in the judean area of israel between 1983 and 1985 showed that sheep were parasitized by the following species: rhipicephalus sanguineus group (30.6%), rhipicephalus bursa (25.3%), haemaphysalis cretica (20.5%), haemaphysalis otophila (20.1%) and hyalomma anatolicum excavatum (3.1%). three other species, hyalomma marginatum rufipes, boophilus annulatus and amblyomma lepidum were also present but in very low numbers. a total of 50,816 specimens (78.1% adult ticks) ... | 1996 | 8746133 |
| ticks of domestic animals in the macedonia region of greece. | a study was carried out on ticks of domestic animals in the macedonia region of greece. during 1983-1986, 11,620 tick specimens, belonging to 18 species and subspecies, were collected from cattle, sheep, goats and dogs, in 64 localities throughout macedonia. rhipicephalus bursa, the most common tick, and hyalomma marginatum marginatum occurred in all bioclimatic zones, as well as the two one-host ticks, boophilus annulatus and h. detritum scupense, which were present in fewer localities. r. tura ... | 1996 | 8792578 |
| adult ixodid ticks on two cattle breeds in the south-western free state, and their seasonal dynamics. | a study was conducted to compare the species of adult ixodid ticks on friesian and bonsmara cattle and their seasonal dynamics. between five and ten animals of each breed were kept on natural false upper karoo vegetation, typical of the south-western free state. between may 1990 and october 1991, the animals were examined once or twice a month for the presence of adult ticks which were removed, counted and identified. six species of ixodid ticks were recorded. the species composition on the two ... | 1996 | 8848299 |
| survival of six species of african ticks in relation to saturation deficits. | the survival of unfed males and females of six species of african ticks was monitored at five different saturation deficits at constant temperature (25 degrees c). the survivorship curves for each species comprised a pre-mortality period, prior to when ticks started to die and a mortality period corresponding to a rapid increase in the mortality rate. longevity was defined as pre-mortality plus mortality. a negative correlation between the longevity of the ticks and the saturation deficits was f ... | 1996 | 9022266 |
| rickettsia aeschlimannii sp. nov., a new spotted fever group rickettsia associated with hyalomma marginatum ticks. | we formally propose the name rickettsia aeschlimannii sp. nov. for a new spotted fever group (sfg) rickettsia, strain mc16t, isolated from hyalomma marginatum marginatum ticks collected in morocco. this organism shows a typical rickettsial morphology when analyzed by electron microscopy. after characterization by serotyping, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, western immunoblotting, pcr-restriction fragment length polymorphism (rflp), pulsed-field gel electrophoresis, and ... | 1997 | 9103647 |
| comparative immunizing power of infections, salivary extracts, and intestinal extracts of hyalomma marginatum marginatum in cattle. | tick concealed antigens have been successful in producing immunity that inhibits tick fertility, but require periodic revaccination and are little effective in preventing tick feeding, which is critical to stop pathogen transmission. tick natural salivary antigens also induce important immunity, but revaccination may be unnecessary in enzootic areas. in addition these antigens may inhibit tick feeding. we immunized groups of three tick-naive calves with four prior infestations with hyalomma marg ... | 1997 | 9106957 |
| detection of theileria annulata by the pcr in ticks (acari:ixodidae) collected from cattle in mauritania. | we report on the detection of theileria annulata in infected hyalomma ticks by the pcr using primers derived from the gene encoding the 30 kda major merozoite surface antigen (tamsi-1). no inhibition of the pcr was observed and as little as 0.1 pg of parasite dna, corresponding to 12 sporozoites, could be detected in non-infected tick dna samples, spiked with t. annulata genomic dna. hyalomma dromedarii ticks, fed on a calf experimentally infected with t. annulata, were used to validate the pcr ... | 1997 | 9203350 |
| crimean-congo hemorrhagic fever in ticks (acari: ixodidae) and ruminants: field observations of an epizootic in bandia, senegal (1989-1992). | from 1989 to 1992, a longitudinal study of the relationships between different tick species and domestic ungulates in the transmission and amplification of crimean-congo hemorrhagic fever (cchf) virus was undertaken in the bandia area in senegal where the presence of the virus had been reported previously. an epizootic occurred in 1991-1992 and 22 strains of cchf virus were isolated from hyalomma marginatum rufipes koch, amblyomma variegatum (f.), rhipicephalus guilhoni morel & vassiliades, and ... | 1997 | 9379454 |
| evidence to show that an agent that cross-reacts serologically with cowdria ruminantium in zimbabwe is transmitted by ticks. | the serological diagnosis of heartwater based on reactions to the immunodominant cowdria ruminantium major antigen protein-1 (map-1) is impaired by the detection of false-positive reactions. in this study, the prevalence of false-positive reactions on seven heartwater-free farms in zimbabwe was determined to be 8-94% by immunoblotting against c. ruminantium antigens. the highest prevalence of false-positives on spring valley farm correlated with the presence of rhipicephalus evertsi evertsi tick ... | 1998 | 9493330 |
| taxonomic relationships among spotted fever group rickettsiae as revealed by antigenic analysis with monoclonal antibodies. | the spotted fever group (sfg) is made up of more than 20 different rickettsial species and strains. study of the taxonomic relationships among the group has been attempted by phenotypic, genotypic, and phylogenetic analyses. in this study, we determined taxonomic relationships among the sfg rickettsiae by comparative analysis of immunogenic epitopes reactive against a panel of monoclonal antibodies. a total of 98 monoclonal antibodies, which were directed against epitopes on the major immunodomi ... | 1998 | 9542904 |
| predation of livestock ticks by chickens as a tick-control method in a resource-poor urban environment. | the possible use of chickens as predators of livestock ticks was studied. chickens were allowed to scavenge for 3 h among tick-infested cattle in a typical township backyard during the milking period. boophilus decoloratus, hyalomma marginatum rufipes, rhipicephalus evertsi evertsi and otobius megnini were recovered from the crops and gizzards at necropsy. the numbers of ticks ingested ranged from 0-128, with an average of 28.81 (+/- 8.42) per chicken. this study has confirmed that chickens are ... | 1997 | 9551478 |
| phylogenetic placement of rickettsiae from the ticks amblyomma americanum and ixodes scapularis. | a rickettsial isolate (isolate moaa) belonging to the spotted fever group (sfg) was obtained from the lone star tick amblyomma americanum. we used pcr to characterize the genes for the rickettsial outer membrane proteins rompa and rompb. we sequenced the pcr products (domains i of both the rompa gene and the rompb gene) of moaa and wb-8-2, another rickettsial isolate from a. americanum. to place moaa and wb-8-2 and two other nonpathogenic isolates (rickettsia rickettsii hip2 and rickettsia monta ... | 1998 | 9574696 |
| in vitro susceptibilities of 27 rickettsiae to 13 antimicrobials. | the mics of 13 antibiotics (doxycycline, thiamphenicol, rifampin, amoxicillin, gentamicin, co-trimoxazole, ciprofloxacin, pefloxacin, ofloxacin, erythromycin, josamycin, clarithromycin, and pristinamycin) were determined for 27 available rickettsial species or strains. we used two in vitro cell culture methods described previously: the plaque assay and the microplaque colorimetric assay. our results confirm the susceptibilities of rickettsiae to doxycycline, thiamphenicol, and fluoroquinolones. ... | 1998 | 9660979 |
| bovine babesiosis. seroprevalence and ticks associated with cattle from two different regions of morocco. | a total of 475 bovine sera collected in 1995-1996 from 10 areas belonging to two different bioclimatic strata were tested for antibody activity to babesia bigemina and babesia bovis using indirect immunofluorescence (iif). in the gharb, the b. bovis seroprevalence was 21.7% and for b. bigemina, 10.8%. the infection rate for either or both species as determined microscopically with giemsa-stained blood films was 18.9%. the tiflet area was considered an endemic focus, and the seroprevalence was 42 ... | 1998 | 9668467 |
| seasonal variation of ticks on cattle in burkina faso. | cattle of the sahel zebu peuhl breed from traditionally managed livestock herds in a representative area of north soudanese savana (with 400-900 mm of rainfall/year from may to september) located in the central land of burkina faso, were monitored over 12 months for tick and blood parasite. two species of ticks were found: amblyomma variegatum and hyalomma marginatum rufipes. h. m. rufipes was found on cattle all year round with a highest infestation rate in june characterized by means of 10 +/- ... | 1998 | 9668496 |
| a survey of the ixodid ticks parasitising cattle in the eastern province of zambia. | the results of tick surveys carried out in the eastern province of zambia between december 1982 and february 1996 were principally in agreement with the findings of earlier surveys conducted during the period 1965-72. boophilus decoloratus has almost been replaced by boophilus microplus. hyalomma truncatum was found in small numbers throughout the province and hyalomma marginatum rufipes was only rarely encountered in collections made from cattle. rhipicephalus evertsi evertsi was largely confin ... | 1998 | 9737594 |
| comparison of effects of low and high tick infestations on acquired cattle tick resistance: hyalomma marginatum marginatum. | three holstein calves were infested with low numbers of ticks, two or three pairs of adults hyalomma marginatum marginatum in cloth bag daily for 21 days. infestation was carried out during tick proliferation periods. two months later, cattle leads were challenged with 100 pairs of ticks. another group of three holstein calves were infested five times with 100 pairs of adult ticks of the same species. the five infestations were performed two weeks from the previous infestation. three tick charac ... | 1998 | 9754299 |
| a retrospective serological survey of humans in india for wanowrie virus. | wanowrie virus (wan) is an ungrouped arbovirus having morphogenetic characters in common with bunyavirus. it was isolated for the first time from ticks, hyalomma marginatum isacci (6700 strain) and subsequently from a human case (68923 strain). in the absence of any reports on the prevalence of this virus amongst humans in india, 600 human sera were tested in the complement fixation (cf) test against both the strains of wan virus. one hundred human sera were randomly selected from six different ... | 1998 | 9914674 |
| molecular characterization of a haemaphysalis longicornis tick salivary gland-associated 29-kilodalton protein and its effect as a vaccine against tick infestation in rabbits. | the use of tick vaccines in mammalian hosts has been shown to be the most promising alternative tick control method to current use of acaricides, which suffers from a number of limitations. however, the success of this method is dependent on the identification, cloning, and in vitro expression of tick molecules involved in the mediation of key physiological roles with respect to the biological success of a tick as a vector and pest. we have sequenced and characterized a haemaphysalis longicornis ... | 1999 | 10084999 |
| tick diversity, abundance and seasonal dynamics in a resource-poor urban environment in the free state province. | the objectives of this study were to determine the diversity, seasonal dynamics and abundance of ticks infesting cattle in urban, small-scale farming communities in and around botshabelo and thaba nchu in the eastern free state province, south africa. a total of ten cattle, ear-tagged for individual identification, were investigated monthly at each of five localities. adult ticks were removed from the right hand side of each animal and placed in containers filled with 70% ethanol. they were subs ... | 1998 | 10192844 |
| [experimental transmission of crimean-congo hemorrhagic fever virus: role of 3 vector species in the maintenance and transmission cycles in senegal]. | in this article, we published the role of three species of ticks amblyomma variegatum (fabricius, 1974), hyalomma marginatum rufipes (koch, 1844) and hyalomma truncatum (koch, 1844) in the maintenance and transmission of the cchf virus. the imagos of these species were infected by intracoelomic route. vertical transmission (transtasial and transovarial) and horizontal transmission for different stases were studied by isolation on newborn mice, polymerase chain reaction, indirect immunofluorescen ... | 1999 | 10229934 |
| simultaneous detection of bovine theileria and babesia species by reverse line blot hybridization. | a reverse line blot (rlb) assay was developed for the identification of cattle carrying different species of theileria and babesia simultaneously. we included theileria annulata, t. parva, t. mutans, t. taurotragi, and t. velifera in the assay, as well as parasites belonging to the t. sergenti-t. buffeli-t. orientalis group. the babesia species included were babesia bovis, b. bigemina, and b. divergens. the assay employs one set of primers for specific amplification of the rrna gene v4 hypervari ... | 1999 | 10325324 |
| sense organs in post-embryonic stages of hyalomma marginatum marginatum koch, 1844 (acari: ixodida: ixodidae). i. tarsal sensory system. | light and scanning electron microscopic studies showed the differences in morphology and in size of haller's organ in larvae, nymphs and adults (females and males) of hyalomma marginatum marginatum koch, 1844. the length of the anterior pit setae increases during post-embryonic development. the localization of these setae is the same in all stages. six setae (one porose seta, two grooved setae, two fine setae, one conical seta) contain anterior pit of various developmental stages. in nymphs and ... | 1998 | 10376284 |
| female tick hyalomma marginatum marginatum salivary glands: preliminary study on protein changes during feeding process and antigens recognized by repeatedly infested cattle. | proteins extracted from salivary glands of unfed, three days and five days fed adult hyalomma marginatum marginatum were analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (sds-page). we have noticed changes during the three feeding steps. some proteins disappeared during feeding process (23, 38, 39, 40 to 50, 95 and 112 kda), they might be proteins which were converted in other substances and are secreted. other antigens (13 to 14, 20, 25, 29, 165 and 210 kda) were synthesize ... | 1999 | 10633500 |
| genetic diversity of borrelia burgdorferi sensu lato in ticks from mainland portugal. | to date borrelia lusitaniae is the only genospecies of borrelia burgdorferi sensu lato isolated from ixodes ricinus ticks collected in portugal and tunisia. this suggests that the genospecies diversity of b. burgdorferi sensu lato decreases toward the southwestern margin of its old world subtropical range. in order to further explore the genetic diversity of b. burgdorferi sensu lato from this region, 55 i. ricinus and 27 hyalomma marginatum questing adults, collected during the spring of 1998 f ... | 2000 | 10834965 |
| distribution and ecology of ticks (acari: ixodidae) infesting livestock in tunisia: an overview of eighth years field collections. | ticks (ixodidae) play a significant role as vectors of pathogens of domestic animals in tunisia. the major losses caused by ticks are related to transmission of protozoan parasites. these include agents of tropical theileriosis and babesiosis in ruminants. since 1991, we conducted research studies on tick population of livestock in tunisia. this overview reports a synthesis on tick distribution, their biology and their role as vectors of pathogens in domestic animals, particularly cattle. during ... | 1999 | 11071534 |
| general review of tick species present in portugal. | at present, 24 species are known to occur in portugal: argas vespertilionis, ornithodoros maritimus and ornithodoros erraticus in argasidae; ixodes acuminatus, ixodes bivari, ixodes canisuga, ixodes frontalis, ixodes hexagonus, ixodes ricinus, ixodes simplex simplex, ixodes ventalloi, ixodes vespertilionis, dermacentor marginatus, dermacentor pictus', haemaphysalis hispanica, haemaphysalis inermis, haemaphysalis punctata, rhipicephalus bursa, rhipicephalus pusillus, rhipicephalus sanguineus, rhi ... | 1999 | 11071535 |
| epidemiology of mediterranean theileriosis in extremadura region, spain. | extremadura is an extensive region (41,000 km2) located in the southwest of spain, where animal husbandry is a very important economical resource. livestock parasitism of ticks is common in the region and it is favoured by the environmental conditions and management systems. mediterranean theileriosis (mt) is perhaps the most important tick-borne disease of cattle. although theileria annulata has been identified in extremadura since 1933, little epidemiological information is available. during t ... | 1999 | 11071543 |
| acarological studies in two protected areas of central italy. | in the present note are reported the results of preliminary studies on tick distribution in two wildlife areas of abruzzo (national park of abruzzo, a mountainous area, approximately 40,000 ha, in central apennines, interesting abruzzo, latium and molise regions) and latium (capocotta-castel porziano presidential reserve, on the tyrrhenian coast, 30 km from rome). sampling of ticks from domestic and wild mammals as well as from vegetation, was performed in three different areas of the national p ... | 1999 | 11071544 |
| clinical and laboratory studies on theileriosis outbreaks in sicily, italy. | a total of 153 blood samples were collected all over the sicilian island in 15 farms. 29.4% and 25.5% were pcr positive for theileria annulata and t. buffeli/orientalis respectively. 15.7% of cattle blood samples showed a mixed infection with both theileria species. each farm showed an infection rate ranging from 0% to 100%. hyalomma marginatum and boophilus annulatus were the most common ticks collected in april and november 1998 respectively. the aim of the present work was to investigate on h ... | 1999 | 11071547 |
| feeding patterns of immature stages of hyalomma truncatum and hyalomma marginatum rufipes on different hosts. | in this study we examine the feeding patterns of immature stages of hyalomma truncatum and hyalomma marginatum rufipes ticks on different hosts. larvae of h. truncatum developed through a three-host pattern on two species of field mice, rhabdomys pumilio and lemniscomys rosalia. on guinea-pigs, both hyalomma species followed a mixed two-host and three-host pattern, with the latter route being preferred, since more than 70% of the fully fed larvae dropped off from their hosts. h. truncatum was a ... | 2000 | 11110240 |
| experimental teratogeny in the tick hyalomma marginatum marginatum (acari: ixodida: ixodidae): effect of high humidity on embryonic development. | the effect of 90% rh on the embryonic development of hyalomma marginatum marginatum koch was investigated at 25 degrees c. under the influence of this factor, 2.1% dead eggs, 13.0% dead embryos, 6.9% abnormally hatched larvae, 0.2% larvae with malformations, and 77.8% normal larvae appeared. the embryos died during the cleavage of nuclei, the formation of the blastoderm, the formation of the germ band and its metamerization, and the differentiation of the leg anlagen. egg hatch was also inhibite ... | 2000 | 11126534 |
| tick infestation of borana cattle in the borana province of ethiopia. | a study was conducted to identify and determine burdens of ticks infesting borana cattle in the borana province of ethiopia. rhipicephalus pulchellus, rhipicephalus pravus, rhipicephalus muhsamae, rhipicephalus praetextatus, rhipicephalus evertsi evertsi, amblyomma gemma, amblyomma variegatum, amblyomma cohaerens, amblyomma lepidum, hyalomma truncatum, hyalomma marginatum rufipes and boophilus decoloratus were identified on the cattle. their burdens ranged from 658-1,554 with a mean of 1,205 tic ... | 2001 | 11403429 |
| detection of haemoparasites in cattle by reverse line blot hybridisation with a note on the distribution of ticks in sicily. | a reverse line blot hybridisation (rlb) of 21 oligonucleotides with polymerase chain reaction (pcr) amplified regions of 16s rrna (ehrlichia/anaplasma group) or 18s rrna (babesia/theileria group) genes of haemoparasites detected theileria annulata, t. buffeli/orientalis, babesia bovis, b. bigemina, b. divergens, ehrlichia bovis, anaplasma marginale, a. centrale and unknown species within the rickettsia tribe.a very high prevalence of mixed infections was detected, which indicated that animals in ... | 2001 | 11511414 |
| [results of the 20-year study of tick-borne encephalitis in crimea]. | the history of tick-borne encephalitis (tbe) study in the crimea was retraced and the possibility of introduction of tbe virus to the crimea in the process of the acclimatization of vertebrates from areas enzootic for tbe is discussed. the foci of tbe were found throughout the whole of the mountain forest zone of the crimea and coincided with the habitat area of lxodes ricinus, the main vector of tbe. such ticks as dermacentor reticulatus, d. marginatus and hyalomma marginatum were also found to ... | 2001 | 11548243 |
| sense organs in post-embryonic stages of hyalomma marginatum marginatum koch, 1844 (acari: ixodida: ixodidae). ii. palpal organ. | light microscopy and scanning electron microscopy (sem) studies show the differences in structure, number and topography of terminal setae in the palpal organ in different stages of hyalomma marginatum marginatum koch, 1844. the palpal organ contains eight terminal setae in larvae and nymphs, and ten setae in adults. the length of these setae increases in the course of post-embryonic development. other setae on palpal segments also undergo quantitative and morphological changes. | 2000 | 11686078 |
| characterization of the glycoproteins of crimean-congo hemorrhagic fever virus. | crimean-congo hemorrhagic fever (cchf) virus is the cause of an important tick-borne disease of humans throughout regions of africa, europe, and asia. like other members of the genus nairovirus, family bunyaviridae, the cchf virus m genome rna segment encodes the virus glycoproteins. sequence analysis of the cchf virus (matin strain) m rna segment revealed one major open reading frame that potentially encodes a precursor polyprotein 1,689 amino acids (aa) in length. comparison of the deduced ami ... | 2002 | 12072526 |
| first documented human rickettsia aeschlimannii infection. | | 2002 | 12095451 |
| rickettsia aeschlimannii: a new pathogenic spotted fever group rickettsia, south africa. | | 2002 | 12141981 |
| [characteristics of crimean-congo hemorrhagic fever virus circulating in russia and central asia]. | five antigen-positive samples isolated from patients with crimean-congo hemorrhagic fever (cchf) and from hyalomma marginatum ticks collected in the european part of russia and three laboratory strains of cchf isolated in russia, uzbekistan, and tadjikistan were analyzed by reverse transcription-polymerase chain reaction (rt-pcr) and sequencing. comparison of nucleotide sequences of fragments of cchf virus genome s segment and phylogenetic analysis of russian strains showed that all cchf strains ... | 2002 | 12173427 |