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exotic ectoparasites of ostriches recently imported into the united states.eleven species of ectoparasitic arthropods were collected and identified from ostriches (struthio camelus) recently imported into the united states from africa and europe. four of these species are reported from ostriches for the first time. the parasites included adult hippoboscid flies (struthiobosca struthionis) and 10 species of adult ixodid ticks (amblyomma gemma, a. lepidum, a. variegatum, haemaphysalis punctata, hyalomma albiparmatum, h. luscitanicum, h. marginatum rufipes, h. truncatum, ...19912023323
the ecology of the african vectors of heartwater, with particular reference to amblyomma hebraeum and amblyomma variegatum.the hosts, sites of attachment, life cycle, habitat requirements and seasonal abundance of amblyomma astrion, amblyomma cohaerens, amblyomma gemma, amblyomma hebraeum, amblyomma lepidum, amblyomma marmoreum, amblyomma pomposum, amblyomma sparsum, amblyomma tholloni and amblyomma variegatum, the 10 potential vectors of heartwater in africa, are listed. factors influencing the distribution and abundance of the ticks as well as interactions with other species and the role of predators and pathogens ...19873329326
a study of the justification for intensive tick control in kenyan rangelands.sixty male weaner cattle at the national range research station, kiboko, kenya were placed in four groups of 15 animals under four different tick control regimens for 16 months. the treatment groups were: spraying with acaricide weekly, spraying every three weeks, spraying whenever group mean tick infestations reached more than 200 per animal (once only in the course of the study) and a control unsprayed group. the cattle were weighed monthly. there were no significant differences between the li ...19863798681
[detection of amblyomma gemma dön. (ixodidae) in the crimea]. 19724271864
cowdria ruminantium identified in amblyomma gemma using a dna probe pcs20.amblyomma gemma ticks were collected from wild animals on a 20,000 acre game ranch in a heartwater endemic area in kenya, close to nairobi. a. variegatum is the main vector of heartwater in kenya. e.a. lewis, 1947, in a one sentence report has implicated a. gemma to be a vector of heartwater without giving any details. adult a. gemma were collected from giraffe giraffa camelopardalis, hartebeest alcephalus busephalus, eland taurotragus oryx and ostrich struthio camelus during cropping exercises. ...19938134629
ixodid ticks (acari: ixodidae) and livestock production: effect of varying acaricide treatments on ticks and productivity in east coast fever-immunized weaner and dairy cattle.in a pilot trial to evaluate cost-effective methods of acaricide application, east coast fever-immunized weaner and dairy cattle were subjected to varying tick control regimens. all experimental cattle were maintained under the same extensive system of management. their monthly tick load, packed cell volumes, incidence of blood protozoans, weight changes, and daily milk production were noted. apart from rhipicephalus appendiculatus neumann, other tick species found in the study site were r. pulc ...19938510109
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 ...200111403429
tickborne arbovirus surveillance in market livestock, nairobi, kenya.to identify tickborne viruses circulating in kenya and the surrounding region, we conducted surveillance at abattoirs in nairobi, kenya. species of ticks collected included rhipicephalus pulchellus (56%), amblyomma gemma (14%), r. appendiculatus (8%), a. variegatum (6%), and others. a total of 56 virus isolates were obtained, 26 from a. gemma, 17 from r. pulchellus, 6 from a. variegatum, and 7 from other species. virus isolates included dugbe virus (dugv), an unknown virus related to dugv, thogo ...200616836823
ticks (acari: ixodidae) associated with wildlife and vegetation of haller park along the kenyan coastline.this artcile describes the results obtained from a tick survey conducted in haller park along the kenyan coastline. the survey aimed at evaluating tick-host associations, assessing tick population density, and providing baseline information for planning future tick control and management in the park. ticks (2,968) were collected by handpicking from eight species of wildlife and by dragging in 14 selected sites within the park. a considerable proportion of ticks were also collected from leaves, s ...200617017210
survey of tick infestation in small ruminants of miesso district, west harergie, oromia region, ethiopia.a survey was conducted to identify tick species and determine the prevalence of tick infestation in small ruminants of miesso district, west harergie zone. collection and identification of the ticks were undertaken from november 2007 to april 2008. all visible individual adult ticks were collected from the body of 328 goats and 40 sheep. the prevalence of tick infestation in goats and sheep was found to be 89.9% and 87.5%, respectively. in this study, ten species of ticks which grouped under fou ...200919082757
kupe virus, a new virus in the family bunyaviridae, genus nairovirus, kenya.we have previously described isolation and preliminary identification of a virus related to dugbe virus (dugv), family bunyaviridae, genus nairovirus. six isolates of the virus were obtained from pools of amblyomma gemma and rhipicephalus pulchellus ticks collected from hides of cattle in nairobi, kenya, in october 1999. we report results of further characterization of this virus, including growth kinetics in cell culture and full-length genome sequencing and genetic characterization, which show ...200919193256
prevalence of anaplasma marginale in different tick species from ngorongoro crater, tanzania.in 2001, ngorongoro crater was infested with high density of ticks on grassland, livestock and wildlife which was also associated with high mortality. adult ticks were collected, identified, processed for nucleic acids extraction and a molecular analysis was performed to determine the range of tick species harboring anaplasma marginale. the real-time pcr was used in the amplification of rickettsia dna in tick pools (n=527) from 11 identified tick species. six tick species were detected with a. m ...200919201099
prevalence and species composition of ixodid ticks infesting horses in three agroecologies in central oromia, ethiopia.a cross-sectional study was conducted to determine the species composition and prevalence of ixodid ticks infesting horses in three agroecological zones in central ethiopia. for this purpose, a total of 1,168 horses were examined for tick infestation. an overall prevalence of 39.04% of tick infestation on horses was recorded. a total of 917 adult ticks were collected from infested horses. amblyomma, boophilus, rhipicephalus, and hyalomma genera with the respective prevalence of 3.2%, 1.8%, 29.2% ...201121656133
isolation of tick and mosquito-borne arboviruses from ticks sampled from livestock and wild animal hosts in ijara district, kenya.tick-borne viruses infect humans through the bite of infected ticks during opportunistic feeding or through crushing of ticks by hand and, in some instances, through contact with infected viremic animals. the ijara district, an arid to semiarid region in northern kenya, is home to a pastoralist community for whom livestock keeping is a way of life. part of the ijara district lies within the boundaries of a kenya wildlife service-protected conservation area. arbovirus activity among mosquitoes, a ...201323805790
ixodid tick infestation in cattle and wild animals in maswa and iringa, tanzania.ticks and tick-borne diseases are important in human and livestock health worldwide. in november 2012, ixodid ticks were collected and identified morphologically from cattle and wild animals in the maswa district and iringa urban, tanzania. amblyomma gemma, a. lepidum, and a. variegatum were identified from maswa cattle, and a. variegatum was the predominant species. a. marmoreum, hyalomma impeltatum, and rhipicephalus pulchellus were identified from iringa cattle in addition to the above 3 ambl ...201425352709
ticks and tick-borne viruses from livestock hosts in arid and semiarid regions of the eastern and northeastern parts of kenya.biodiversity and relative abundance of ticks and associated arboviruses in garissa (northeastern) and isiolo (eastern) provinces of kenya were evaluated. ticks were collected from livestock, identified to species, pooled, and processed for virus isolation. in garissa, rhipicephalus pulchellus gerstacker (57.8%) and hyalomma truncatum koch (27.8%) were the most abundant species sampled, whereas r. pulchellus (80.4%) and amblyomma gemma donitz (9.6%) were the most abundant in isiolo. forty-four vi ...201424605478
altitudinal and seasonal differences of tick communities in dogs from pastoralist tribes of northern kenya.studies regarding the distribution and ecology of ticks in dogs from eastern africa are scarce. our research was based on a long-term screening of ticks parasitising the domestic dogs living with indigenous people around lake turkana, mt. kulal and mt. nyiru areas, northern kenya. a total of 9977 ticks were collected from 1464 dogs of all ages and both sexes. identification was performed using morphological keys and data were analyzed using the repeated measures anova, post-hoc scheffe test and ...201526343303
occurrence and genotyping of coxiella burnetii in ixodid ticks in oromia, ethiopia.this study was conducted from september 2011 to march 2014 to address the occurrence and genotypes of coxiella burnetii using molecular methods in ticks collected from domestic animals in ethiopia. ticks were tested for c. burnetii by quantitative real-time polymerase chain reaction (qpcr) targeting two different genes followed by multispacer sequence typing (mst). an overall prevalence of 6.4% (54/842) of c. burnetii was recorded. c. burnetii was detected in 28.6% (14/49) of amblyomma gemma, 25 ...201526392155
ticks (acari: ixodidae) infesting cattle and african buffaloes in the tsavo conservation area, kenya.several ixodid tick species are shared between domestic cattle and african buffaloes (syncerus caffer). so too, are a number of tick-borne diseases. the aim of the study was to compare the species composition of ticks that infest cattle and buffaloes utilising the same habitat within the tsavo conservation area, kenya. to this end, 25 cattle and 62 buffaloes were each opportunistically sampled for ticks on a single occasion in february 2010. eight species, namely amblyomma gemma, amblyomma lepid ...201223327329
transmission of cowdria ruminantium by amblyomma gemma from infected african buffalo (syncerus caffer) and eland (taurotragus oryx) to sheep.two african buffalo (syncerus caffer), an eland (taurotragus oryx) and a waterbuck (kobus defassa) were intravenously inoculated with cowdria ruminantium (kiswani). amblyomma gemma nymphs were fed on the animals at 3 weekly intervals. jugular blood was also collected at 3 weekly intervals and inoculated into sheep. nymphal ticks that fed on one buffalo on days 16 and 37 and on the other buffalo on day 58 after infection transmitted the disease as adults to sheep. nymphs that were applied to the ...200111556617
detection of rickettsia aeschlimannii and rickettsia africae in ixodid ticks from burkina faso and somali region of ethiopia by new real-time pcr assays.in the framework of cooperation for development projects in burkina faso and ethiopia, we collected ixodid ticks from cattle, small ruminants and camels. we optimized new taqman probe real-time pcr assays to detect rickettsia aeschlimannii and rickettsia africae ompa gene in the collected samples. rickettsia africae was identified in 75.0% amblyomma variegatum (95%ci: 56.6-88.5), while r. aeschlimannii in 24.0% hyalomma truncatum (95%ci: 9.4-45.1) and 50.0% h. rufipes (95%ci: 29.9-70.0) collecte ...201627641952
ticks and tick-borne pathogens in livestock from nomadic herds in the somali region, ethiopia.between may 2006 and january 2007, blood samples and ticks were randomly collected from 220 nomadic animals from filtu and dollo odo districts, libaan zone, in the somali region of ethiopia. overall, 81.5% cattle, 98.2% camels, 53.4% goats and 61.1% sheep were infested by ixodid ticks. collected ticks (n = 1,036) were identified as rhipicephalus pulchellus (40.1%), r. pravus (25.8%), amblyomma gemma (9.4%), hyalomma rufipes (13.3%), h. truncatum (2.8%), h. impeltatum (1.2%) and h. dromedarii (0. ...201222349943
species of ticks on camels and their seasonal population dynamics in eastern ethiopia.a study was conducted to identify the species of ticks found on camels (camelus dromedarius) and their seasonal population dynamics in eastern ethiopia. collection and identification of the ticks were undertaken at 2-month intervals from december 1997 to august 1999. on each occasion, all the visible adult ticks were collected from one side of the body of each of the same 17 camels. the most abundant species of ticks on the camels were rhipiephalus pulchellus (85.2%), hyalomma dromedarii (5.9%), ...200415080539
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