Distribution and expression of esat-6 and cfp-10 in non-tuberculous mycobacteria isolated from lymph nodes of slaughtered cattle in Switzerland.

ABSTRACT: The most commonly used tools for tuberculosis testing in cattle, the tuberculin skin test and the interferon-γ release assay, detect immune reactivity to various antigens of Mycobacterium bovis, including ESAT-6 and CFP-10. However, some non-tuberculous mycobacteria (NTM) can also harbor the cfp-10 and/or esat-6 genes, which can lead to false-positive results. We tested 77 NTM isolates belonging to 22 different species from lymph nodes of healthy slaughtered cattle for the occurrence of cfp-10 and esat-6. Most isolates did not harbor cfp-10 and esat-6. However, M. gordonae, 'M. lymphaticum', M. kansasii, and M. persicum were cfp-10 positive. The esat-6 gene was found in M. kansasii and M. persicum. Protein expression of cfp-10 and esat-6 could be detected for M. kansasii and M. persicum. A

SUBMITTER: Scherrer S 

PROVIDER: S-EPMC6838824 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature