Abstract

KONE Tadiogo Naty Amine*, GOLY Kouassi Roselin Cyrille, BENIE Comoé Koffi Donatien, KOFFI Ahua René, OUATTARA Yakoura Karidja, KOUADIO GUESSENND Nathalie and DADIE Adjéhi

This study aimed to determine the impact of a feed supplement administration on E. coli virulent strains in piglets. A breeding of four batches of two piglets was carried out. Batch A served as controls and batches B, C and D were administered respectively with Algo-Bio^®, tetracycline and penicillin-streptomycin combination therapy. E. coli strains were isolated from faeces on Mac Conkey medium, and identify them. Antibiotic susceptibility test was performed using disk diffusion method on Müller-Hinton agar, and then virulence genes were determined by PCR. Antibiotic susceptibility test revealed 58 E.coli ESBL-producing strains. Serotyping of these strains showed O128 (36.2%), O111 (20.6%), O119 (18.9%), O124 (15.5%) and O125 (8.6%). The prevalence of strains harboring eaeA, Stx2, st and lt genes increased in control piglets from D0 to D4. The strains prevalence hosting eaeA, st and lt genes increased from 50%, 75% and 100% respectively on D0 to 0 on D4. The percentages of strains harboring the eaeA, Stx2 and lt genes decreased from 75% to 46.6%, from 50% to 40%, from 75% to 53.3% respectively in piglets treated with tetracycline. Algo-Bio^® administration decreased virulent strains in piglet microbiota. This supplement could promote better control of antibiotic resistance risks in pig farming.