Antimicrobial resistant Escherichia coli in the reproductive tract microbiota of cows and sows

TORRES LUQUE, A.; CANDELARIA GONZALEZ MORENO; PASTERIS, S.E.; JOSÉ A ORDEN; RICARDO DE LA FUENTE; OTERO, MARIA CLAUDIA

COMPARATIVE IMMUNOLOGY MICROBIOLOGY AND INFECTIOUS DISEASES

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2017 vol. 55 p. 13 - 19

0147-9571

Escherichia coli is a natural colonizer of the urogenitalmucosa of healthy females; however it is one of the pathogens associatedto reproductive failures in cows and sows. A better knowledge about thecharacteristics of native E. coli will allow us to differentiate themfrom pathogenic strains. Ninety autochthonous isolates from thereproductive tract of sows and cows were characterized to determine thephylogenetic profile, antibiotic resistance and virulence factors; also,comparisons between different breeding systems were performed. Vaginalcolonization of E. coli was statistically higher in cows (57.5%) thansows (23.8%), and most isolates belonged to the phylogenetic group A:79.69 and 80.77%, respectively; moreover phylo-groups B1 (12.5 and11.54%) and D (7.81 and 7.69%) were significantly lower; however, nonewas classified as B2. Positive associations between virulence factors andgroup D were found. Isolates with antimicrobial susceptibility wereassociated with group A and the MDR (Multiple Drug Resistance) wasrelated to the porcine source. These results contribute to the knowledgeof extra-intestinal E. coli populations; which could affect thereproductive performance of females.