title: Outbreak of avian mycobacteriosis in flocks of domestic pigeons: An epidemiological approach.
abstract: OBJECTIVE
  Pigeons are extensively kept for homing and racing purposes in Iran. The main objective of this study was to investigate dissemination of M. avium subsp. avium (MAA) in pigeon aviaries in Tabriz, North-western Iran.
  
  
  METHODS
  Postmortem pathologic specimens from thirty-nine out of 140 birds collected from private flocks (n=3), were subjected to bacterial culture out of which 3-4 mycobacterial isolates were recovered.
  
  
  RESULTS
  Applying a five-PCR diagnostic algorithm targeting short but definitive stretches of 16S rRNA and RV0577 genes, IS6110, IS901 and IS1245 genomic loci, proved all the isolates were MAA. They were either IS901+/IS1245+(n=22) or IS901+/IS1245- (n=12). When four healthy cattle sensitized against Mycobacterium bovis AN5 and Mycobacterium avium D4 were tuberculinated, the results confirmed the observed skin reactions against bovine tuberculin in animals sensitized with M. avium were large enough to complicate test interpretation.
  
  
  CONCLUSIONS
  We believe the extent of such epidemiological impact deserves further investigation if progress in control of bovine tuberculosis is intended.
authors.affiliation: PPD Production Department, Razi Vaccine & Serum Research Institute, Karaj, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Bolfion
authors.forename: M
authors.initials: M
authors.lastname: Salehi
authors.forename: J
authors.initials: J
authors.lastname: Ashrafi Helan
authors.forename: K
authors.initials: K
authors.lastname: Soleimani
authors.forename: R
authors.initials: R
authors.lastname: Keshavarz
authors.forename: R
authors.initials: R
authors.lastname: Aref Pajoohi
authors.forename: M
authors.initials: M
authors.lastname: Mohammad Taheri
authors.forename: K
authors.initials: K
authors.lastname: Tadayon
authors.forename: N
authors.initials: N
authors.lastname: Mosavari