| A quantitative polymerase chain reaction assay for detection and quantification of Lawsonia intracellularis. | |
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MedLine Citation:
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PMID: 20224090 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Lawsonia intracellularis, a causative agent of porcine proliferative enteropathy, is an obligate intracellular bacterium that is difficult to culture, propagate, and quantify. The intestinal epithelial cell line (IEC-18, derived from rat small intestine crypt cells) has been used to isolate and propagate this pathogen. However, the lack of rapid and simple quantification methods has led to mixed results when using the rat cell line, complicating Lawsonia studies. To overcome these limitations, a SYBR green quantitative polymerase chain reaction (qPCR) assay targeting a unique hypothetical protein was developed for detecting and quantifying L. intracellularis in IEC-18 rat epithelial cells, porcine fecal samples collected from different farms, and experimentally infected pigs. The method was optimized to detect as few as 3 copies per qPCR reaction of the bacterium growing in IEC-18 cells, providing a new and necessary approach to assess the growth of L. intracellularis in these cell lines. Furthermore, the qPCR assay was successful in detecting L. intracellularis in fecal samples collected from pigs with and without a history of Lawsonia infections, as well as in experimentally infected pigs, which further confirmed the suitability of the qPCR assay for studying the epidemiology of this pathogen. |
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Authors:
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Mary Drozd; Issmat I Kassem; Wondwossen Gebreyes; Gireesh Rajashekara |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc Volume: 22 ISSN: 1040-6387 ISO Abbreviation: J. Vet. Diagn. Invest. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-12 Completed Date: 2010-04-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9011490 Medline TA: J Vet Diagn Invest Country: United States |
Other Details:
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Languages: eng Pagination: 265-9 Citation Subset: IM |
Affiliation:
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Food Animal Health Research Program, Ohio Agricultural Research Development Center, Department of Veterinary Preventive Medicine, The Ohio State University, Wooster, OH 44691, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cell Line Desulfovibrionaceae Infections / diagnosis, microbiology, veterinary* Feces / microbiology Lawsonia Bacteria / isolation & purification* Polymerase Chain Reaction / methods, veterinary* Rats Swine Swine Diseases / diagnosis*, microbiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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