Thais Vieira, Carla Adriana Dos Santos, Amanda Maria de Jesus Bertani, Gisele Lozano Costa, Karoline Rodrigues Campos, Cláudio Tavares Sacchi, Marcos Paulo Vieira Cunha, Eneas Carvalho, Alef Janguas da Costa, Jacqueline Boldrin de Paiva, Marcela da Silva Rubio, Carlos Henrique Camargo, Monique Ribeiro Tiba-Casas
Until 2015, polymyxin resistance was primarily attributed to chromosomal mutations. However, with the first report of mobile colistin resistance ( mcr-1 ) in commensal Escherichia coli from food animals in China, the landscape has changed. To evaluate the presence of polymyxin resistance in Salmonella spp., a drop screening test for colistin and polymyxin B was carried out on 1156 isolates of non-human origin (animals, food, and the environment), received in Brazil, between 2016 and 2021. Subsequently, 210 isolates with resistant results in the drop test were subjected to the gold-standard test (broth microdilution) for both colistin and polymyxin B...
January 23, 2024: Antibiotics