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KMID : 1023520090320040307
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Korean Journal of Veterinary Service
2009 Volume.32 No. 4 p.307 ~ p.314
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Active and passive surveillance of bovine spongiform encephalopathy in Bangladesh
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Halder Halder
Chowdhury Emdadul Haque
Parvin Rokshana
Rahaman Mohammad Moshiyour
Rahman Seikh Masudur
Saha Shib Shankar
Sultana Sajeda
Marium Nadira
Islam Azharul
Rahman Md. Siddiqur
Song Hee-Jong
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Abstract
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The aim of the present study was to investigate whether Bovine Spongiform Encephalopathy (BSE) is present in this country and to analyze the Global BSE Risk (GBR) status in Bangladesh. A total of 2,000 brain samples were collected from cattle older than 30 months of age, slaughtered for human consumption in the district slaughter houses from 2005 to 2006. The brainstem (obex), Pyriform lobe, cerebrum and cerebellum were subjected to histopathological study. Samples that showed some nonspecific lesions were subjected to immunohistochemistry and only brain stem to ELISA for the detection of abnormal prion protein PrPsc. In passive surveillance, annual overall diseases of cattle, buffalo, sheep and goats in Bangladesh were collected from Department of Livestock Services (DLS), Dhaka to investigate the occurrences of neurological diseases. Import related data were collected from “National Export Promotion Bureau” Kawran Bazar, Bangladesh Bank and DLS to analyze the importing products of animal origin (cattle, buffalo, sheep and goats) from different countries to find whether or not the imported products posed any risk for the BSE. In an actire surveillance conducted in slaughter house, histopathologically BSE specific lesions were not detected in any of the brain samples, but other nonspecific lesions were observed. No PrPsc was detected from the samples by immunohistochemistry and ELISA. DLS report also supported the absence of BSE in cattle and buffalo and scrapie in sheep and goats in Bangladesh. It was also clearly recorded that Bangladesh imported livestock products from countries in GBR level I and II but not from countries in GBR level III and IV. From this study it apparently seems that BSE is not currently present in the indigenous animals in Bangladesh and poses no or negligible risk to human and animal health.
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KEYWORD
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Bovine spongiform encephalopathy (BSE), Histopathology and immunohistochemistry, Brain tissues, Active and passive surveillance
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