Short communication: Extended-spectrum AmpC-producing Escherichia coli from milk and feces in dairy farms in Brazil

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Santiago, GS (Author) Other; Coelho, IS (Author) Other; Bronzato, GF (Author) Other; Moreira, AB (Author) Other; Goncalves, D (Author) Other; Alencar, TA (Author) Other; Helena Sousa (Author) FFUP; Castro, BG (Author) Other; Souza, MMS (Author) Other; Coelho, SMO (Author) Other

Journal

Title: Journal of Dairy Science

Vol. 101

Pages: 7808-7811

ISSN: 0022-0302

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00P-JP8

DOI: 10.3168/jds.2017-13658

Abstract (EN): The Alive enzyme is normally expressed constitutively in Escherichia coli, and its overproduction confers resistance to cefoxitin. A newly reported AmpC, the extended-spectrum AmpC (ESAC), is related to resistance to cefepime, a fourth-generation cephalosporin. This enzyme presents more flexibility in the active site due to insertions, replacements, and deletions on AA sequences. Many isolates producing ESAC were reported in human clinical isolates, but E. coli ESAC producers were reported in animals only in France. The animal E. coli strains can produce this enzyme and possibly disseminate it to human and production environments. In our study, 3 strains of E. coli from milk and feces bovine samples, collected in Rio de Janeiro, Brazil, were suspected to produce ESAC. After excluding other mechanisms of resistance, the gene was sequenced to verify ESAC characteristics. These strains presented replacement of AA in omega and R2 loops, suggesting ESAC production. This is the first report to study ESAC E. coli in dairy farms in Brazil.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4