| serological surveillance of bluetongue virus in cattle in central iran. | the aim of this study was to evaluate the seroprevalence and distribution of antibodies to the bluetongue virus (btv) among dairy holstein cattle of central iran. from september 2010 to august 2011, 892 blood samples from holstein dairy cattle were collected from healthy animals. blood samples were divided according to type of farm (industrial and non-industrial), season (warm and cold), location (north, south, east, and west), cattle production groups (calf, heifer, dairy and dry) and age group ... | 2013 | 23888413 |
| seroprevalence of bovine leukemia virus (blv) infection in dairy cattle in isfahan province, iran. | bovine leukemia virus (blv), the causative agent of enzootic bovine leukosis (ebl) is an exogenous c-type oncovirus in the retroviridae family. it causes significant economic losses associated with the costs of control and eradication programs due to carcass condemnation at slaughter and restrictions of export of cattle and semen to importing countries. the main objective of this research was to determine the seroprevalence of blv infection in cattle herds in central region of iran (isfahan prov ... | 2011 | 22210288 |
| detection and risk factors of coxiella burnetii infection in dairy cattle based on bulk tank milk samples in center of iran. | infection with coxiella burnetii has a worldwide distribution in ruminants and is associated with abortions and reproductive problems in this group of animals. this study aimed to determine the prevalence of c. burnetii dna in bulk tank milk (btm) of dairy cattle herds and to identify the risk factors of infection. this cross-sectional study was conducted in spring 2015. a total of 163 btm samples from 74 commercial and 89 traditional dairy cattle herds in isfahan, iran was tested for the is1111 ... | 2016 | 27836035 |
| consequences and economics of metritis in iranian holstein dairy farms. | the objectives of this study were (1) to describe the risk factors, incidence, and productive and reproductive consequences of metritis in dairy cows, and (2) to estimate the financial losses associated with metritis using data gathered from 4 holstein dairy farms in isfahan, iran. calving records from march 2008 to december 2013, comprising 43,488 calvings, were included in the data set. the effects of metritis on productive and reproductive performance were analyzed using a mixed linear model ... | 2015 | 26117350 |
| copper, zinc, and iron concentrations in blood serum and diet of dairy cattle on semi-industrial farms in central iran. | the aim of this study was to evaluate the blood serum and diet concentrations of copper, zinc, and iron in holstein dairy cattle kept under semi-industrial farming in isfahan province, central iran. moreover, the effects of season, pregnancy, and daily milk yield on serum cu, zn, and fe concentrations were also evaluated. the study was carried out on 12 semi-industrial holstein dairy cattle farms. a total of 120 blood serum samples (60 in each season) and 24 diet samples (12 in each season) were ... | 2011 | 21667325 |
| seroepidemiological study of bovine respiratory viruses (brsv, bohv-1, pi-3v, bvdv, and bav-3) in dairy cattle in central region of iran (esfahan province). | respiratory diseases in calves are responsible for major economic losses in both beef and dairy production. several viruses, such as bovine respiratory syncytial virus (brsv), bovine herpes virus-1 (bohv-1), bovine parainfluenza virus-3 (bpi-3v), bovine viral diarrhea virus (bvdv), and bovine adenoviruses (bav), are detected in most clinical cases with respiratory signs. the aim of this study is to define seroprevalences of five major viral causes of bovine respiratory infections in cattle in ce ... | 2011 | 21667075 |
| paratuberculosis in holstein-friesian cattle farms in central iran. | paratuberculosis is an important disease of ruminants with a worldwide distribution. in developing countries where funding constraints challenge establishment of control schemes, large losses are incurred on cattle farmers due to paratuberculosis. in this study, faecal specimens from holstein-friesian cows with progressed and moderate clinical paratuberculosis (n = 223) from 13 dairy farms in isfahan, central iran, were subjected to bacterial culture. culture growth diagnostic for m. avium subsp ... | 2008 | 18484118 |
| estimation of genetic parameters for 13 female fertility indices in holstein dairy cows. | this study was aimed to assess genetic parameters for 13 traits in heifers and first-parity holstein dairy cows. data consisted of calving and insemination dates of 14,707 holstein dairy cows in isfahan province of iran. reproductive traits included age at first service (afs), first service to conception (fstc), gestation length (gl), age at first calving (afc), calving to first service (ctfs), days open (do), calving interval (ci), number of services per conception (ns), and non-return rate at ... | 2010 | 21161596 |
| leptin gene polymorphism in iranian native golpayegani and taleshi cows. | the objective of the present investigation was to study genetic variations in the exon ii of leptin gene in iranian golpayegani and taleshi cows. blood samples were collected from 76 golpayegani and 64 taleshi cows randomly selected from delijan city (esfahan province) and talesh city (guilan province) in iran, respectively. genomic dna was extracted from 100 micro litters of blood using guanidium thiocyanate-silica gel method. a 94 bp fragment from exon ii of the bovine leptin gene was amplifie ... | 2007 | 19093494 |
| bionomics of phlebotomus papatasi (diptera: psychodidae) in an endemic focus of zoonotic cutaneous leishmaniasis in central iran. | following an epidemiological survey of zoonotic cutaneous leishmaniasis (zcl) in several villages of badrood, a rural district north of the city of natanz, central iran, phlebotomus (phlebotomus) papatasi scopoli were found to be naturally infected with leishmania (leishmania) major zymodeme mon-26. sand flies were collected and dissected biweekly from rodent burrows from may to october 2001. leptomonad infection rates varied between 6.7% and 22.0%, being greatest in september, coinciding with p ... | 2005 | 16007964 |
| protected methionine prolonged provision improves summer production and reproduction of lactating dairy cows. | the objective was to establish prolonged effects of a rumen-protected met (rpm) product (smartaminem) on milk production and reproduction of high-producing early-lactation cows under extended very high ambient temperatures. twenty four fresh holstein cows (27 +/- 9 days in milk, 617 kg b.wt., 2.8 body condition score) including 12 second lactation and 12 higher lactation cows were randomly assigned to either control or rpm-supplemented total mixed rations (tmr, 520:480 g kg(-1) forage:concentrat ... | 2013 | 24494524 |