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seroprevalence and risk factors of fascioliasis in yaks, bos grunniens, from three counties of gansu province, china.the aim of this study was to determine the seroprevalence and risk factors of fascioliasis in yaks, bos grunniens, from 3 counties of gansu province in china. a total of 1,584 serum samples, including 974 samples from white yaks from tianzhu, 464 from black yaks from maqu, and 146 from black yaks from luqu county, were collected and analyzed using elisa to detect igg antibodies against fasciola hepatica. the overall f. hepatica seroprevalence was 28.7% (454/1,584), with 29.2% in white yaks (284/ ...201728285513
seroprevalence, risk factors and genetic characterization of toxoplasma gondii in free-range white yaks (bos grunniens) in china.the objective of this study was to determine the seroprevalence, risk factors and genotypes of toxoplasma gondii in white yaks (bos grunniens) in china. a total of 974 serum samples were collected from white yaks in tianzhu tibetan autonomous county (ttac), gansu province, northwest china for detecting t. gondii antibodies by the modified agglutination test (mat), and 414 tissues belonging to 138 white yaks were collected for detecting t. gondii dna by amplification of b1 gene with a semi-nested ...201526038187
seroprevalence and risk factors of bovine viral diarrhoea virus (bvdv) infection in yaks (bos grunniens) in northwest china.bovine viral diarrhoea virus (bvdv), a member of the pestivirus genus, is an important pathogen of cattle worldwide, causing reproductive disorders in adult cattle and mucosal disease in calves. however, limited information about bvdv infection in yaks (bos grunniens) in china is available, especially in white yaks which is a unique yak breed that only lives in tianzhu tibetan autonomous county (ttac), gansu province, northwest china. therefore, we conducted a cross-sectional study to estimate t ...201627509877
first detection of ungulate tetraparvovirus 1 (bovine hokovirus 1) in domestic yaks in northwestern china.we describe the discovery and phylogenetic analysis of ungulate tetraparvovirus 1 (also referred to as bovine hokovirus 1, b-parv4, or partetravirus) in domestic yaks (bos grunniens) in northwestern china. the yak b-parv4 genome was detected in yak blood samples by pcr, using b-parv4 primers corresponding to conserved regions. twenty-two of 370 samples were positive for a b-parv4-related genome sequence, indicating an overall prevalence of 5.95 %. the prevalence in qinghai province (13/195, 6.67 ...201626483281
characterization of the complete mitochondrial genome sequence of gannan yak (bos grunniens).gannan yak is the native breed of gansu province in china. in this work, the complete mitochondrial genome sequence of gannan yak was determined for the first time. the total length of the mitogenome is 16,322 bp long, with the base composition of 33.74% a, 25.84% t, 13.18% c, and 27.24% g. it contained 13 protein-coding genes, 22 trna genes, two rrna genes and one non-coding region (d-loop region). the gene order of gannan yak mitogenome is identical to that observed in most other vertebrates. ...201624960561
first report of cryptosporidium spp. in white yaks in china.cryptosporidium is an enteric apicomplexan parasite, which can infect yaks, leading to reduction of milk production and poor weight gain. white yak (bos grunniens) is a unique yak breed inhabiting only in tianzhu tibetan autonomous county, gansu province, northwestern china. the objective of the present study was to molecularly determine cryptosporidium infection and species in white yaks.201424885747
molecular investigation of piroplasma infection in white yaks (bos grunniens) in gansu province, china.piroplasmosis, including theileriosis and babesiosis, is a tick-borne haemoprotozoan disease responsible for huge economic losses to livestock industry. in china, the biology of piroplasms infective to cattle was well understood on the basis of pathogen isolations and molecular epidemiological surveys in the past few decades. but very limited information about the infection status of piroplasms in white yak (bos grunniens), a semi-wild and endemic breed, has been recorded, so far. a total of 350 ...201728427963
detection of enterocytozoon bieneusi in white yaks in gansu province, china.enterocytozoon bieneusi, the most common zoonotic pathogen of microsporidiosis, has been found in various animals and humans, but no information is available concerning the prevalence and genotypes of e. bieneusi in white yaks (bos grunniens). in the present study, 353 faecal samples from white yaks in tianzhu tibetan autonomous county, gansu province, northwestern china, were collected and examined by pcr amplification of the internal transcribed spacer gene to estimate e. bieneusi prevalence a ...201728676859
seroprevalence of and risk factors for neospora caninum infection in yaks (bos grunniens) in china.the aim of the present study was to detect the seroprevalence of neospora caninum infection in yaks in gansu province, china. serum samples from 974 white yaks and 610 black yaks were tested by a commercial competitive-inhibition elisa for the detection of specific anti-n. caninum antibodies.; n. caninum antibodies were detected in 10.4% of yaks with higher prevalence in black (11.5% of 610) than white yak (8.6% of 974). age, regions and sampling times were considered as risk factors associated ...201728606319
molecular epidemiology and characterization of bovine leukemia virus in domestic yaks (bos grunniens) on the qinghai-tibet plateau, china.bovine leukemia virus (blv) is a member of the genus deltaretrovirus of the family retroviridae and cause a chronic lymphosarcoma, which is extensive in cattle. in yaks (bos grunniens), the distribution, strains and genetic characteristics of blv have rarely been studied. the aim of our study was to investigate blv infections in domestic yaks and determine the genetic variability of blv circulating in a region of the qinghai tibet plateau, china. blood samples were collected from 798 yaks, which ...201729224130
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