Affiliation:
1. Universidade Federal de Santa Maria, Brazil
Abstract
ABSTRACT Mastitis is considered the main disease that affects dairy cattle worldwide, and it is caused mainly by Staphylococcus aureus and environmental Streptococcus spp. Eventually, nonconventional pathogens, as rapidly growing mycobacteria(RGM), may also cause chronic mastitis, which will not be responsive to antibiotic treatments. Diagnosis of mastitis caused by RGM is a difficult task, and most of time this agent may be misdiagnosed. Here we describe a case of clinical mastitis caused by the RGM Mycobacteroides abscessus in a cow from Southern Brazil, confirmed by microbiological and molecular characterization. Our results reinforce the necessity of a detailed laboratorial identification of the agent and to include this agent in differential diagnosis of chronical clinical mastitis nonresponsive to treatment.
Reference12 articles.
1. Mycobacterial infections in domestic and wild animals due to Mycobacterium marinum, M. fortuitum, M. chelonae, M. porcinum, M. farcinogenes, M. smegmatis, M. scrofulaceum, M. xenopi, M. kansasii, M. simiae and M. genavense;BERCOVIER H.;Rev. Sci. Techn,2001
2. Bovine mastitis: an evolving disease;BRADLEY A.J;Vet. J.,2002
3. Performance standards for antimicrobial disk and dilution susceptibility tests for bacteria isolated from animals,2013
4. First report in China on the identification and drug sensitivity of Mycobacterium elephantis isolated from the milk of a cow with mastitis;JI L.Y.;Biom. Environ. Sci.,2017
5. Molecular epidemiology of Mycobacterium abscessus, with focus on cystic fibrosis;JÖNSSON B.E.;J. Clin. Microbiol.,2007