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Journal of Clinical Microbiology, Aug 1995, 2048-2053, Vol 33, No. 8
H Li, DT Shen, D O'Toole, DP Knowles, JR Gorham and TB Crawford
Development of control measures for the gammaherpesviral disease of cattle
known as sheep-associated malignant catarrhal fever (SA-MCF) has been
hampered by a lack of accurate diagnostic tests either for the causative
virus or for antibody against that virus. A recently developed
competitive-inhibition enzyme-linked immunosorbent assay (CI- ELISA) for
the detection of antibody to malignant catarrhal fever (MCF) virus (MCFV)
in ruminants based on a monoclonal antibody to a widely conserved epitope
of MCFV (H. Li, D. T. Shen, D. P. Knowles, J. R. Gorham, and T. B.
Crawford, J. Clin. Microbiol. 32:1674-1679, 1994) and a PCR assay based on
previously reported primers (S. I. F. Baxter, I. Pow, A. Bridgen, and H. W.
Reid, Arch. Virol. 132:145-159, 1993) were used to detect anti-MCFV
antibody and SA-MCFV DNA in sheep and other ruminants. The PCR amplified a
specific 238-bp SA-MCFV genomic DNA fragment from peripheral blood
lymphocytes of adult sheep and other ruminants with clinical MCF. Of 144
samples from randomly selected healthy adult sheep, 143 (99%) were positive
by PCR and 136 (94%) were positive by CI-ELISA. The agreement between the
two assays exceeded 95%. Of nine samples collected from cattle and deer
with clinical MCF of apparent sheep origin, seven were CI-ELISA positive
and all 9 were PCR positive. Among 59 serum samples from presuckling lambs,
none contained antibody detectable by CI-ELISA. After suckling, maternal
anti-MCFV antibody was detectable for about 10 +/- 3 weeks.(ABSTRACT
TRUNCATED AT 250 WORDS)
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Investigation of sheep-associated malignant catarrhal fever virus infection in ruminants by PCR and competitive inhibition enzyme-linked immunosorbent assay
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040, USA.
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