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Quantification of Mycobacterium avium subspecies in pig tissues by real-time quantitative PCR
- Source :
- Acta Veterinaria Scandinavica
- Publication Year :
- 2012
-
Abstract
- Background: Mycobacterioses in animals cause economical losses and certain Mycobacterium avium subspecies are regarded as potential zoonotic agents. The evaluation of the zoonotic risk caused by M. avium subspecies requires information about the quantities of Mycobacterium strains in infected animals. Because M. avium subspecies in pig tissues are difficult or even impossible to quantify by culturing, we tested the suitability of a culture-independent real-time quantitative PCR (qPCR) assay for this purpose. Methods: Mycobacterial DNA was extracted from porcine tissues by a novel method and quantified by Mycobacterium genus specific qPCR assay targeting the 16S rRNA gene. Results: The response of the qPCR assay to the amount of M. avium subspecies avium mixed with porcine liver was linear in the range of approximately log10 5 to log10 7 Mycobacterium cells per 1 g of liver. The assay was validated with three other M. avium subspecies strains. When the assay was applied to porcine lymph nodes with or without visible lesions related to Mycobacterium avium subspecies infections, around 10 4 –10 7 mycobacterial genomes per gram of lymph nodes were detected. Conclusions: The qPCR assay was found to be suitable for the quantification of Mycobacterium avium subspecies in porcine lymph nodes and liver.
- Subjects :
- 040301 veterinary sciences
Swine
Porcine
Biology
Subspecies
Real-Time Polymerase Chain Reaction
Genome
Microbiology
Mycobacterium
0403 veterinary science
03 medical and health sciences
Quantification
Animals
Gene
0303 health sciences
Microscopy
Pig
General Veterinary
Real-time qPCR
030306 microbiology
Research
04 agricultural and veterinary sciences
General Medicine
Ribosomal RNA
16S ribosomal RNA
biology.organism_classification
Virology
Real-time polymerase chain reaction
Liver
Lymph
Mycobacterium avium
Subjects
Details
- ISSN :
- 17510147
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Acta veterinaria Scandinavica
- Accession number :
- edsair.doi.dedup.....4628329feac0c963b939524ce4be6c76