Bovine rhinitis viruses (BRV) are established etiological agents of bovine respiratory disease complex however little research into their epidemiology and ecology has been published for several decades. In the U.S., only bovine rhinitis A virus 1 (BRAV1) has been identified while bovine rhinitis A virus 2 (BRAV2) and bovine rhinitis B virus (BRBV) were previously only identified in England and ...

Infectious bovine rhinotracheitis is an important disease of cattle with serious economic implications. The etiology is bovine herpes virus type-1 which leads to clinical to latent infections and abortions. In this study, an aborted bovine fetus was suspected of IBR infection. The virus was grown in cell line (MDBK) and cytopathic effect observed. CPE began at 12 hr post infection of cells and ...

Feline Coronavirus (FCoV), Feline Leukaemia Virus (FeLV), Feline Immunodeficiency Virus (FIV) and Feline ParvoVirus (FPV) are significantly important viral agents in domestic and wild cats, cause prevalently immunosuppressive infections in cat population in worldwide [5, 11, 14, 17, 18, 27]. These diseases are commonly characterized by immune pathological defects such immunodeficiency, immunosu...

Twelve neonate calves were repeatedly challenged with bovine papilloma virus. All calves were initially susceptible to bovine papilloma virus and complete resistance to challenge occurred after the onset of fibroma regression. Fibroma regression was not correlated with serum antibody titers to bovine papilloma virus as measured by an immunodiffusion assay. Fibroma regression occurred prior to t...

The yields of the Armstrong and WE strains of lymphocytic choriomeningitis virus in baby hamster kidney (BHK) cells cultivated in either bovine, calf, fetal bovine, or horse serum were investigated. Lines of BHK cells were established in these sera. When the infected cell lines were observed by immunofluorescence, the per cent fluorescing cells for a given virus strain did not vary. However, fo...

U.v. irradiation of SH-RP cells, a lymphoblastoid cell line carrying EpsteinBarr virus, which was derived from a patient with acute myeloid leukaemia, retarded cell growth but significantly enhanced the percentage of cells containing virus-capsid antigen (VCA) as demonstrated by indirect immunofluorescence. The effects of u.v. irradiation on SH-RP cultures were reversible under normal condition...

AIM To define the relation between T large granular lymphocyte (T-LGL) leukaemia and pure red cell aplasia in Chinese patients. METHODS Patients with T-LGL leukaemia were identified from a consecutive series of Chinese patients with chronic lymphoproliferative disorders. The diagnosis of T-LGL leukaemia was based on typical morphological and immunophenotypical features, and confirmed by the d...

Bovine viral diarrhoea virus (BVDV) is an important pathogen of dairy cattle. In this study, bulk milk samples representing a total of 4105 milking cows, from 18 dairy cattle herds in the suburb of Mashhad- Iran, were tested for presence of BVDV by the use of a nested reverse transcription polymerase chain reaction (Nested RT- PCR) assay. Non of the cows in the herds had been vaccinated against...