MURINE COLONIZATION MODEL BY CAMPYLOBACTER COLI DSPV458

RUIZ, MARÍA JULIA; SOTO, LORENA; SIRINI, NOELÍ; WERNING, LAURA; OLIVERO, CAROLINA; ZIMMERMANN, JORGE; ZBRUN, VIRGINIA; ACOSTA, FEDERICO; SIGNORINI, MARCELO; FRIZZO, LAUREANO

JOURNAL OF APPLIED MICROBIOLOGY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2022 vol. 132 p. 1457 - 1466

1364-5072

Aims The aim of this study was to generate a murine experimental model of colonization by Campylobacter coli DSPV458.Methods and ResultsTwelve adult Balb/cCmedc female mice were housed in a treated group (T-G) and a control group (C-G) for 4 weeks. Both experimental groups received antibiotics for 5 d during the first week. The T-G was administered with 6.68log10CFU of C. coli DSPV458 by esophageal gavage. Necropsies were performed weekly to evaluate translocation and intestinal colonization in the spleen and liver and in the ileum and cecum, respectively. Samples were cultured to quantify intestinal microbiota members. Feces were cultured weekly for a C. coli DSPV458 count. Campylobacter coli DSPV458 was isolated from all the inoculated mice. The recovered level of C. coli DSPV458 was, on average, 6.9 log10CFUg-1, 8.0 log10CFUg-1 and 1.6 log10CFUg-1 in feces, the cecum and ileum, respectively. Colonization by C. coli DSPV458 does not alter the normal clinical and physiological status.ConclusionsCampylobacter coli DSPV458 does not have an invasive capacity, and the model is suitable for evaluating strategies to reduce intestinal loads. Significance and Impact of StudyFarm animals have an important impact in thermotolerant Campylobacter transmission to humans. Extremely few colonization models by C. coli have been reported to date. In food-producing animals, the infection is mild or absent and thermotolerant Campylobacter colonize the intestines of the animals. The colonization models are specific models that do not cause infection as they do not generally result in diarrhea or other signs of disease. Therefore, this model will allow the evaluation of the evolution of colonization by thermotolerant Campylobacter and the alternative tools development to antibiotics that limit their colonization in food-producing animals.