Serotypes and Multiresistant Salmonella sp. from Chicken Eggs and Laying Hens in Burkina Faso

Abstract

The study investigated the prevalence and antibioresistance profil of Salmonella sp. serovars isolated from eggs and poultry in stock farming. A total of 245 eggs and 98 laying hens fecal matters from different breeding sheds were collected. The samples were processed for identification and serotyping of Salmonella sp using microbiological standard methods and Kauffman-White scheme respectively. Salmonella sp isolates antibiotic susceptibility to antimicrobial agents was tested by disk diffusion method. A total of 63 Salmonella isolates were recovered with positive samples from eggs (11.8%) and from faecal matter (12.24%). The successful serotyping of 53/63 isolates revealed the presence of S. Typhimurium (11.11%), S. Kentucky (1.59%), S. Ouakam (1.59%), S. Brancaster (6.35%), S Hato (6.35%), S. Essen (3.17%), S. Cannstatt (1.59%), and S. Derby (36.51%). Ten strains (15.87%) were untypable and ten (15.87%) belong to different serogroups such F and O. All the sérotypes shown resistance to at least one antibiotic while, 41 (65.08%) were multi-resistant to Erythromycin, Streptomycin, Tetracycline, Ceftriaxon, while high sensitivity was recorded for Chloramphenicol, Ciprofloxacin, Nalidixic acid, Imipenem, Cephalexin, Sulfamethoxazole-trimethoprim and Colistin Sulfate. These results suggest that eggs from stock farming are contaminated and harbour resistant Salmonella sp. It highlights worry in antibiotics use in stock farming, the need for farm workers and consumers education about safe handling of eggs.