Detection by PCR of Neospora caninum in fetal tissues from spontaneous bovine abortions.
نویسندگان
چکیده
The routine diagnosis of Neospora caninum abortion is based upon histopathologic changes in fetal tissues and identification of tissue parasites by immunohistochemistry. Confirmation of N. caninum infection by immunohistochemistry has low sensitivity. In the present study, we examined the utility of PCR in detecting N. caninum infection in fetal tissues from spontaneous bovine abortion. DNA was obtained from fresh and formalin-fixed tissues from 61 bovine fetuses submitted for abortion diagnosis. Histopathology and immunohistochemistry determined the true status of N. caninum infection in each fetus. In formalin-fixed paraffin-embedded tissues, PCR detected N. caninum DNA in 13 of 13 true-positive fetuses (100%) and in 1 of 16 true-negative fetuses (6%). In fresh or frozen tissues, PCR detected N. caninum DNA in 10 of 13 true-positive fetuses (77%) and 0 of 11 true-negative fetuses (0%). PCR also detected N. caninum DNA in 6 of 8 fetuses that had typical lesions of N. caninum but were immunohistochemistry negative, indicating a higher sensitivity of PCR in comparison to that of immunohistochemistry. N. caninum DNA was amplified most consistently from brain tissue. PCR detection of N. caninum DNA in formalin-fixed, paraffin-embedded tissues was superior to that in fresh tissues, presumably because of the increased accuracy of sample selection inherent in histologic specimens.
منابع مشابه
Molecular detection of Neospora caninum abortion in dairy cattle from different historical regions of Romania
Neosporosis is a major cause of abortion in many countries, transplacental transmission being considered the major route of transmission of N. caninum in cattle. Little information are available about the prevalence of N. caninum abortion in dairy cattle in Romania, the only existing data are coming from Transylvania region. In the present study, we analyzed by molecular technique (PCR) the pre...
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Neospora caninum, an apicomplexan protozoan, is regarded as a major cause of abortion and stillbirth in cattle in countries world-wide. The ability to detection N.caninum in tissue samples can be a useful detection diagnostic tool for use in the study of the pathogenicity, immunoprophylaxis, and treatment of Neospora infection. However, molecular biology is one of the most sensitive tools for d...
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Marin M.S., Morrell E.L., Pérez S.E., Leunda M.R., Moore D.P., Jones L.R., Campero C.M. & Odeón A.C. 2013. Concomitant infection of Neospora caninum and Bovine Herpesvirus type 5 in spontaneous bovine abortions. Pesquisa Veterinária Brasileira 33(11):1291-1295. Área de Investigación en Producción y Sanidad Animal, Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agrop...
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BACKGROUND The aim of the study was to provide a point of reference to study the Neospora caninum infections in China. METHODS Genome DNA was extracted from the brains of aborted fetuses and specific PCR was performed with N. caninum Nc5-targeted specific primers. Fetal bovine brain tissues were homogenized and continuously cultured in Vero cells with double antibodies. The medium was replace...
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ورودعنوان ژورنال:
- Journal of clinical microbiology
دوره 37 12 شماره
صفحات -
تاریخ انتشار 1999