First report of mcr-1-harboring Salmonella enterica serovar Schwarzengrund isolated from poultry meat in Brazil

Brazilian poultry meat samples were screened for colistin-resistant Salmonella enterica. Sixty Salmonella isolates were tested for in vitro colistin resistance and mcr-1, mcr-2, mcr-3 and mcr-4 genes. Two isolates harbored the mcr-1 gene and whole-genome analysis determined the serovar to be Schwarzengrund, ST96, harboring the IncX4 plasmid. This is the first report of mcr-1-harboring Salmonella enterica serovar Schwarzengrund in Brazil. •First report of mcr-1-harboring Salmonella enterica serovar Schwarzengrund.•Assessment of commercial poultry meat as reservoir of colistin-resistant Salmonella.•Colistin-resistant Salmonella did not present multidrug resistance phenotype.