Isolation of from naturally infected white-tailed deer ()
Veterinary Parasitology(2005)
Abstract
Attempts were made to isolate Neospora caninum from naturally infected white-tailed deer (Odocoileus virginianus). A total of 110 deer killed during the 2003 hunting season in Virginia region were used for the isolation of N. caninum. Of these, brains from 28 deer that had NAT titer of 1:200 were inoculated into interferon-gamma gene knock out (KO) mice. N. caninum was isolated from the tissues of three deer and all three isolates were mildly virulent to KO mice. Only one of the isolates could be adapted to in vitro growth. Protozoa in the tissues of KO mice reacted with N. caninum-specific polyclonal antibodies and N. caninum DNA was demonstrated in infected tissues by PCR assays; sequences of portions of the ITS-1 and gene 5 loci were identical to those in the public database. This is the first record of in vitro isolation of N. caninum from white-tailed deer and lends credence to the white-tailed deer as an intermediate host for this parasite.
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Key words
Neospora caninum,White-tailed deer,Odocoileus virginianus,Isolation,In vitro culture,Immunohistochemistry,Sequence analysis
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