[ first survey on the status of bovine immunudeficiency virus infection and associated clinical, pathological, haematological and flow cytometric findings in Holestein cattle in Iran]

Bovine Immunodeficiency Virus is a Lentivirus which can cause varieties of infectious complications and induce remarkable losses to dairy industry. Considering to the probability of worldwide distribution of the BIV infection, this study was conducted for the first time in Iran to determine of the status of BIV infection in the Holstein cattle and evaluate the associated findings. According to the results of the Nested-PCR method in this study, 16.2% of 197 slaughtered Holstein cattle in Meysam abattoir of Tehran were infective with BIV. Sequencing of the amplicons obtained from PBLs of the cattle using gag-specific primers revealed that there was 98.7-98.9% homology between this field strain and reference sequences of BIV. The infection rate of cattle with enlarged heamal nodes was higher than the animals without these lesions [0.01

[ abattoir survey on prevalence of enzootic bovine leukosis virus infection and associated clinical, haematological and flow cytometric findings in holestein cattle in Tehran]

Bovine leukosis virus [BLV] is a retrovirus that primarily affects lymphoid tissue of cattle. To determine the seroprevalence of Enzootic Bovine Leukosis Virus infection and its effects on some clinical, hematological and flow cytometric indications, this study was conducted on 197 Holstein cattle slaughtered in an abattoir in Tehran province. ELISA gp5 1 test of the obtained serums of the animals showed that the mean of infection rates was 22.3%. Age arrangement of the relative frequencies of the infection showed a significant correlation between EBLV infection and age increasing [0.001