title: Molecular typing, antibiotic resistance, virulence gene and biofilm formation of different Salmonella enterica serotypes.
abstract: Salmonella enterica isolates representing commonly isolated serotypes in Tunisia were analyzed using genotyping and phenotyping methods. ERIC and ITS-PCR applied to 48 Salmonella spp. isolates revealed the presence of 12 and 10 different profiles, respectively. The distribution of profiles among serotypes demonstrated the presence of strains showing an identical fingerprinting pattern. All Salmonella strains used in this study were positive for the sdiA gene. Three Salmonella isolates belonging to serotypes Anatum, Enteritidis and Amsterdam were negative for the invA gene. The spvC gene was detected in thirteen isolates belonging to serotypes Anatum, Typhimurium, Enteritidis, Gallinarum and Montevideo. Antibiotic resistance was frequent among the recovered Salmonella isolates belonging to serotypes Anatum, Typhimurium, Enteritidis, Zanzibar and Derby. The majority of these isolates exhibited resistance to at least two antibiotic families. Four multidrug-resistant isolates were recovered from food animals and poultry products. These isolates exhibited not only resistance to tetracycline, sulphonamides, and ampicillin, but also have shown resistance to fluoroquinolones. Common resistance to nalidixic acid, ciprofloxacin and ofloxacin in two S. Anatum and S. Zanzibar strains isolated from raw meat and poultry was also obtained. Furthermore, wastewater and human isolates exhibited frequent resistance to nalidixic acid and tetracycline. Of all isolates, 33.5% were able to form biofilm.
authors.affiliation: Water Research & Technology Centre (C.E.R.T.E).
authors.forename: Yousra
authors.initials: Y
authors.lastname: Turki
authors.forename: Ines
authors.initials: I
authors.lastname: Mehr
authors.forename: Hadda
authors.initials: H
authors.lastname: Ouzari
authors.forename: Amel
authors.initials: A
authors.lastname: Khessairi
authors.forename: Abdennaceur
authors.initials: A
authors.lastname: Hassen
mesh_terms: D000668:Ampicillin Resistance / Q000235:genetics; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000235:genetics; D018441:Biofilms; D019757:Carbon-Oxygen Lyases / Q000235:genetics; D024901:Drug Resistance, Multiple, Bacterial / Q000235:genetics*; D005767:Gastrointestinal Diseases / Q000188:drug therapy / Q000382:microbiology / Q000473:pathology; D008460:Meat / Q000382:microbiology; D008826:Microbial Sensitivity Tests; D058889:Molecular Typing; D011200:Poultry / Q000382:microbiology; D053038:Quorum Sensing / Q000235:genetics; D012480:Salmonella Infections / Q000188:drug therapy / Q000382:microbiology; D019779:Salmonella enterica / Q000145:classification / Q000187:drug effects / Q000235:genetics / Q000472:pathogenicity; D012703:Serotyping; D013753:Tetracycline Resistance / Q000235:genetics; D015534:Trans-Activators / Q000235:genetics; D014416:Tunisia
chemical_list: D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; C097686:SdiA protein, bacteria; D015534:Trans-Activators; C075518:invA protein, Bacteria; D019757:Carbon-Oxygen Lyases; C527194:phosphothreonine lyase, Salmonella enterica