IS900-PCR-based detection and characterization of Mycobacterium avium subsp. paratuberculosis from buffy coat of cattle and sheep

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• 作者：Mangesh Bhide ; Eaknath Chakurkar ; Ludmila Tkacikova ; Sukhadeo Barbuddhe ; Michal Novak and Ivan Mikula
• 关键词：Mycobacterium avium subsp. paratuberculosis ; IS900 ; Cattle ; Sheep ; PCR ; Johne's disease
• 刊名：Veterinary Microbiology
• 出版年：2006
• 出版时间：10 January 2006
• 年：2006
• 卷：112
• 期：1
• 页码：33-41
• 全文大小：514 K

文摘

Johne's disease is one of the main causes of economic losses in ruminants and a major health hazard in the developing and developed world. Up till now, many microbiological, serological and molecular methods have been tried for the detection of Mycobacterium avium subsp. paratuberculosis (MAP). In this study, we attempt a PCR-based detection of IS900, distinct insertion sequences of MAP from the buffy coat of cattle (n = 262) and sheep (n = 78), and direct genotyping by single strand conformational polymorphism (SSCP). A total of 30 (11.45 % ) cattle and one sheep (1.28 % ) were positive for MAP-IS900. This IS900-based PCR detection proved highly specific, particularly when tested on other non-MAP strains. SSCP analysis grouped the MAP-IS900 into four distinct clusters based on different band patterns. Nucleotide sequence variability between MAPs detected from sheep (GenBank accession AY974348) and cattle (GenBank accession AY974345–AY974347) was noticed in the study. Although, in recent years IS900-PCR-based detection of MAP from WBCs is being used in human, its use in animals is still limited. Our work not only supports its use in animals but also suggests further IS900-SSCP-based MAP-genotyping, coupled with DNA sequencing, as a promising tool for rapid and effective Johne's disease surveillance.