نتایج جستجو برای: cattle

تعداد نتایج: 49532  

2016
Mustafa Karatepe

ABST RACT This study was carried out in order to investigate the presence of Neospora caninum antibodies in local cattle breeds in the Nigde province. The animals used in this study consisted of cattle of at least one year of age slaughtered at a local abattoir in Nigde province of Turkey. Blood samples were obtained from 264 cattle (207 male, 57 female) and serum samples were tested for antibo...

Journal: :Molecular phylogenetics and evolution 2004
H Mannen M Kohno Y Nagata S Tsuji D G Bradley J S Yeo D Nyamsamba Y Zagdsuren M Yokohama K Nomura T Amano

In order to clarify the origin and genetic diversity of cattle in North Eastern Asia, this study examined mitochondrial displacement loop sequence variation and frequencies of Bos taurus and Bos indicus Y chromosome haplotypes in Japanese, Mongolian, and Korean native cattle. In mitochondrial analyses, 20% of Mongolian cattle carried B. indicus mitochondrial haplotypes, but Japanese and Korean ...

2014
Jamal Gharekhani Hamidreza Haddadzadeh Alireza Bahonar

Bovine neosporosis caused by the apicomplexan protozoan parasite N. caninum, was initially recognized in 1989 and is now reported as a leading infectious cause of reproductive failure in dairy cattle in world wide. The aim of this study was to determine the seroprevalence of N. caninum infection in industrial dairy cattle of Hamedan province (west of Iran) by ELISA method. Blood samples were co...

2014
Jayedul Hassan Md. Shafiullah Parvej Md. Bahanur Rahman Md. Shahidur Rahman Khan Md. Tanvir Rahman Tazrin Kamal H. M. Nazmul Hussain Nazir

Cattle are considered as one of the sources of pathogenic E. coli worldwide. The present study was designed to determine the prevalence and identification of the E. coli isolated from rectal swab of apparently healthy cattle in Mymensingh, Bangladesh. A total of 128 rectal swab samples were assessed by cultural, morphological and biochemical examination followed by Polymerase Chain Reaction (PC...

2012
Nora Navarro-Gonzalez Gregorio Mentaberre Concepción M. Porrero Emmanuel Serrano Ana Mateos José M. López-Martín Santiago Lavín Lucas Domínguez

Salmonella is distributed worldwide and is a pathogen of economic and public health importance. As a multi-host pathogen with a long environmental persistence, it is a suitable model for the study of wildlife-livestock interactions. In this work, we aim to explore the spill-over of Salmonella between free-ranging wild boar and livestock in a protected natural area in NE Spain and the presence o...

Journal: :Journal of dairy science 2003
T R Callaway R O Elder J E Keen R C Anderson D J Nisbet

Although Escherichia coli are commensal organisms that reside within the host gut, some pathogenic strains of E. coli can cause hemorrhagic colitis in humans. The most notable enterohemorrhagic E. coli (EHEC) strain is O157:H7. Cattle are asymptomatic natural reservoirs of E. coli O157:H7, and it has been reported that as many as 30% of all cattle are carriers of this pathogen, and in some circ...

Journal: :BMC Veterinary Research 2006
Timm Konold Yoon Hee Lee Michael J Stack Claire Horrocks Robert B Green Melanie Chaplin Marion M Simmons Steve AC Hawkins Richard Lockey John Spiropoulos John W Wilesmith Gerald AH Wells

BACKGROUND Given the theoretical proposal that bovine spongiform encephalopathy (BSE) could have originated from sheep scrapie, this study investigated the pathogenicity for cattle, by intracerebral (i.c.) inoculation, of two pools of scrapie agents sourced in Great Britain before and during the BSE epidemic. Two groups of ten cattle were each inoculated with pools of brain material from sheep ...

Journal: :Animal genetics 2007
R Negrini I J Nijman E Milanesi K Moazami-Goudarzi J L Williams G Erhardt S Dunner C Rodellar A Valentini D G Bradley I Olsaker J Kantanen P Ajmone-Marsan J A Lenstra

The Neolithic introduction of domestic cattle into Europe was followed by differential adaptation, selection, migration and genetic isolation, leading ultimately to the emergence of specialized breeds. We have studied the differentiation of European cattle by amplified fragment length polymorphism (AFLP) fingerprinting. Combining AFLP data sets from two laboratories yielded 81 biallelic polymor...

2013
Jamal Gharekhani Gholamreza Tavoosidana

The main purpose of this investigation was to evaluate the presence of Neospora caninum infection in beef cattle from Hamedan province, Western Iran. Blood samples were collected from 514 industrial beef cattle and tested using ELISA. IgG antibodies against N. caninum were found in 102 (19.8%) sera. Significant differences were observed between seropositive cattle and age group (p=0.022). No si...

2015
Sota KOBAYASHI Toshiyuki TSUTSUI Takehisa YAMAMOTO Yoko HAYAMA Norihiko MUROGA Misako KONISHI Ken-ichiro KAMEYAMA Kenji MURAKAMI

A cohort study was conducted to evaluate the risk of bovine leukemia virus (BLV) transmission to uninfected cattle by adjacent infected cattle in 6 dairy farms. Animals were initially tested in 2010-2011 using a commercial ELISA kit. Uninfected cattle were repeatedly tested every 4 to 6 months until fall of 2012. The Cox proportional hazard model with frailty showed that uninfected cattle neigh...

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