Abstract

GIACOBONI, Gabriela Isabel et al. Circulación de Staphylococcus aureus resistentes a meticilina y multirresistente, en granjas de cría porcina de Argentina. Analecta vet. [online]. 2022, vol.42, n.1, e063. ISSN 1514-2590.  http://dx.doi.org/https://doi.org/10.24215/15142590e063.

In the present work, the presence of methicillin-resistant Staphylococcus aureus (MRSA) was evaluated in the nasal cavity of pigs from intensive farms during 2019 and 2021, with the aim to report MRSA circulation of this relevant public health pathogen in Argentina. A total of 64 samples obtained from 5 farms in Buenos Aires, Santa Fe and San Luis provinces were studied. Nineteen (29.7%) MRSA were isolated, confirmed by the presence of the mecA gene; all isolates were multidrug resistant (3 or more families of antibiotics). All MRSA were susceptible to rifampin, nitrofurantoin, and linezolid and resistant to chloramphenicol, tetracycline, and ciprofloxacin. Resistance to erythromycin, to clindamycin and non-susceptibility to gentamicin was 68.4% (13/19), 78.9% (15/19), and 57,9% (11/19), respectively. Carrier animals were 27, 80, 120 and 154 days old, and MRSA was identified in all the sampled farms. The isolates from 2019 were characterized as clonal complex 1 (community MRSA), which is prevalent in the human population. These findings show the circulation of MRSA in pigs from intensive farms and highlight the need for surveillance in order to take appropriate measures to prevent its spread.

Keywords : Staphylococcus aureus; methicillin- resistance; MRSA; MDR; pigs.