Abstract:
:A real-time PCR assay for quantitative detection of Mycobacterium avium paratuberculosis has been developed. It targets and amplifies sequences from the IS900 insertion element which is specific for this bacterium, and includes an internal amplification control. The assay was tested against 18 isolates of M. avium paratuberculosis, 17 other mycobacterial strains, and 25 non-mycobacterial strains, and was fully selective. It is capable of detecting <3 genomic DNA copies with 99% probability or alternatively, using cells directly in the reaction, 12 cells can be detected with 99% probability. Using prior centrifugation, the assay was able to consistently and quantifiably detect 10(2) M. avium paratuberculosis cells in 20 ml artificially contaminated drinking water. With a simple detergent and enzymatic sample pretreatment before centrifugation and nucleic acid extraction, the assay was able to consistently detect 10(2) M. avium paratuberculosis in 20 ml artificially contaminated semi-skimmed milk. The assay will be a useful addition to the range of diagnostic tools available for the study of M. avium paratuberculosis.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Rodríguez-Lázaro D,D'Agostino M,Herrewegh A,Pla M,Cook N,Ikonomopoulos Jdoi
10.1016/j.ijfoodmicro.2004.09.005subject
Has Abstractpub_date
2005-05-01 00:00:00pages
93-104issue
1eissn
0168-1605issn
1879-3460pii
S0168-1605(04)00534-3journal_volume
101pub_type
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