نتایج جستجو برای: cattle ticks

تعداد نتایج: 57563  

Journal: :The Onderstepoort journal of veterinary research 2001
A Regassa

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 ...

2006
Dania Richter Franz-Rainer Matuschka

To determine the effect of cattle on the risk for Lyme disease, we compared the prevalence of spirochete infection in questing vector ticks collected from a pasture with low-intensity cattle grazing with the prevalence in those collected from a site on which no cattle grazed. The presence of cattle limited the prevalence of Borrelia burgdorferi s.l., but not B. miyamotoi, in vector ticks. The r...

Journal: :Applied and environmental microbiology 2008
Fedor Gassner Patrick Verbaarschot Renate C Smallegange Jeroen Spitzen Sipke E Van Wieren Willem Takken

The effect of introduced large herbivores on the abundance of Ixodes ricinus ticks and their Borrelia infections was studied in a natural woodland in The Netherlands. Oak and pine plots, either ungrazed or grazed by cattle, were selected. Ticks were collected weekly by blanket dragging. Borrelia infections were determined by PCR and restriction fragment length polymorphism. Rodent densities wer...

Journal: :archives of razi institute 0
vahid noaman department of veterinary research, isfahan agricultural and natural resources research and education center, areeo, iran mohammad abdigoudarzi department of parasitology research, razi vaccine and serum research institute, areeo, iran abdol reza nabinejad department of veterinary research, isfahan agricultural and natural resources research and education center, areeo, iran

the objectives of this study were to determine the diversity, seasonal dynamics and abundance of ticks infesting cattle in isfahan zone, iran. the study was conducted in three traditional cattle farms. no acaricides had been applied to cattle at the selected farms. adult ticks were collected twice per month from different parts of the cattle's body. environmental data, including relative h...

Journal: :Parasite 1997
H Sahibi A Rhalem N Tikki F Ben Kouka O Barriga

Field collection of ticks from two breeds of cattle [Native breed (local) and purebred [Friesian)], showed that the number of ticks was higher on purebred than on native cattle. The susceptibility seemed to increase with the age of the animals. Furthermore, breed appeared to exert more influence than age. There was no correlation between the number of ticks associated with each animal, the anti...

Journal: :Journal of economic entomology 2010
J M Pound J E George D M Kammlah K H Lohmeyer R B Davey

From 1907 when the fever tick eradication campaign began until 1933, the tick eradication methods of dipping cattle in an acaricide or "pasture vacation" were enormously successful in eradicating southern cattle ticks [Rhipicephalus (Boophilus) microplus (Canestrini)], until failures began to occur in some areas of Florida. Regarding the failures in Florida, the consensus was that populations o...

2014
M. Pourmahdi Boroujeni

ticks are considered to be the main vectors for transmission of various diseases to animals and human. the present faunistic study aimed to determine species belonging to Ixodidae ticks, infesting cattle of Khoozestan province, south-west of Iran. Totally 1000 ticks were collected randomly from cattle from 9 locations in five geographical regions between January to September 2011, and were iden...

Journal: :Journal of clinical microbiology 1990
P J Kelly P R Mason

Eight rickettsialike organisms were isolated in tissue culture from ticks of dogs and cattle from various areas of Zimbabwe. These isolates and a reference strain, Rickettsia conorii Simko, were tested by microimmunofluorescence against homologous and heterologous antisera raised in mice. From the titers obtained by this method, specificity differences (SPDs) were calculated between each of the...

Journal: :Veterinary parasitology 2008
Ronald B Davey Robert J Miller John E George

Selection pressure with the acaricide, amitraz was applied to a strain of Rhipicephalus (Boophilus) microplus (Canestrini) in 13 out of 18 generations, resulting in a 28.7-fold increase in resistance, indicating a shift in the phenotypic composition of the ticks, from a heterogenous mixture of both susceptible and resistant ticks when selection began to a homogenous composition of predominantly...

Journal: :Veterinary parasitology 2010
Ronald B Davey J Mathews Pound J Allen Miller Jerome A Klavons

The concentration-time profile, therapeutic, and persistent efficacy of a single subcutaneous injection of cattle with a long-acting (LA) formulation of ivermectin at a concentration of 630microg/kg of body weight were determined against Rhipicephalus (Boophilus) microplus. Ivermectin sera concentration in treated cattle increased to 13.0ppb within 1d after treatment, and peaked at 26.2ppb at 1...

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