Colistin-Resistant mcr-1-Positive Escherichia coli ST131-H22 Carrying bla(CTX-M-15) and qnrB19 in Agricultural Soil

Author(s)

Lopes, Ralf ^[1] ; Furlan, Joao Pedro Rueda ^[1] ; dos Santos, Lucas David Rodrigues ^[1] ; Gallo, Inara Fernanda Lage ^[1] ; Stehling, Eliana Guedes ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Dept Clin Anal Toxicol & Food Sci, Ribeirao Preto - Brazil

• Document type: Journal article
• Source: FRONTIERS IN MICROBIOLOGY; v. 12, APR 9 2021.
• Web of Science Citations: 5

Abstract

The pandemic Escherichia coli sequence type 131 (ST131) carrying plasmid-mediated colistin resistance mcr genes has emerged worldwide causing extraintestinal infections, with lineages belonging to three major clades (A, B, and C). Clade B is the most prevalent in animals, contaminating associated meat products, and can be transmitted zoonotically. However, the bla(CTX-M-15) gene has only been associated with C2 subclade so far. In this study, we performed a genomic investigation of an E. coli (strain S802) isolated from a kale crop in Brazil, which exhibited a multidrug-resistant (MDR) profile to clinically significant antimicrobials (i.e., polymyxin, broad-spectrum cephalosporins, aminoglycosides, and fluoroquinolones). Whole-genome sequencing analysis revealed that the S802 strain belonged to serotype O25:H4, ST131/CC131, phylogenetic group B2, and virotype D5. Furthermore, S802 carried the clade B-associated fimH22 allele, genes encoding resistance to clinically important antimicrobials, metals, and biocides, and was phylogenetically related to human, avian, and swine ST131-H22 strains. Additionally, IncHI2-IncQ1, IncF {[}F2:A-:B1], and ColE1-like plasmids were identified harboring mcr-1.1, bla(CTX-M-15), and qnrB19, respectively. The emergence of the E. coli ST131-H22 sublineage carrying mcr-1.1, bla(CTX-M-15), and qnrB19 in agricultural soil represents a threat to food and environmental safety. Therefore, a One Health approach to genomic surveillance studies is required to effectively detect and limit the spread of antimicrobial-resistant bacteria and their resistance genes. (AU)

• FAPESP's process: 18/01890-3 - Study of resistance, virulence and epidemiological profile of Escherichia coli isolated from environment
• Grantee: João Pedro Rueda Furlan
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/19539-0 - Molecular characterization of Escherichia coli isolates from the environment
• Grantee: Eliana Guedes Stehling
• Support Opportunities: Regular Research Grants