Serological investigation of the prevalence of Border disease (BD) in sheep herds of Tabriz area with a history in 2008
Subject Areas :
Veterinary Clinical Pathology
Received: 2009-11-29
Accepted : 2010-10-02
Published : 2010-08-23
Keywords:
Sheep,
Tabriz,
seroprevalence,
Border disease virus,
Abstract :
Abstract
The causal agent of border disease is a pestivirus, which is closely related to a similar virus of cattle called bovine virus diarrhea virus (BVDV). Clinical manifestations of the disease include: infertility, low fertility, mummified fetuses, abortion and still birth, the birth of small weak lambs with tremor and abnormalities of hair coat. This study was conducted in winter of 2008 by referring to sheep farms around Tabriz with a history of abortion especially the Ligwan area as a main sheep rearing area and selection of 4000 sheep as the sample population. Blood samples were drawn from the jugular vein by venoject from 10% of each sheep herd population, the samples were transferred to laboratory in ice and after obtaining serum, the sera were freezed in –20 in order to measure antibody levels with (LSI KIT FRANCE). From a total of 373 sheep including 333 ewes and 40 rams, 282 (75.6%) sheep were considered positive and 91 (24.4%) were negative for Border antivirus - antibody serum. According to sample separation 252 (75.6%) ewes showed positive serum and 81 (24.4%) ewes showed negative serum, 30 (75%) rams showed positive serum and 10 (25%) rams showed negative serum. The results indicate that 75.6% of sheep in Tabriz area are challenged with BDV virus and probably Border virus in one of the main factors in reduction of sheep herds reproduction performance in Tabriz.
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