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    From cattle to pastirma: Contamination source of methicillin susceptible and resistant Staphylococcus aureus (MRSA) along the pastirma production chain
    (Elsevier, 2021) Gungor, Candan; Barel, Mukaddes; Dishan, Adalet; Disli, H. Burak; Koskeroglu, Kursat; Onmaz, Nurhan Ertas
    This study was designed to determine the prevalence of Methicillin Susceptible S. aureus (MSSA) and MethicillinResistant S. aureus (MRSA) and their source of contamination in the pastirma production chain. Additionally, this study was focused on the antimicrobial resistance, virulence profiles, biofilm-forming capabilities and phylogenetic relationships of obtained isolates. A total of 400 samples were analyzed and from which 105 (26.25%) were found positive for coagulase-positive with Staphylococci (CPS). Within the 105 CPS samples, 36 (9%) were identified as S. aureus, from which 8 (2%) were MRSA. Four (11.1%) of 36 S. aureus isolates, of which 3 (37.5%) were MRSA, had a multidrug resistance (MDR), and 6 MRSA strains were found positive for one or more SEs genes (seb, sed, and see). According to the ERIC-PCR analysis, only two S. aureus strains (one with personnel origin and one with carcass origin) were genetically identical. This study highlights the detection frequency of S. aureus in samples analyzed observed, while low, can be a significant public health problem, especially due to the identification of MRSA harboring some enterotoxin genes and having MDR.
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    Profiles of Campylobacter jejuni from raw retail chicken meat: genetic diversity, pathogenic features, and antibiotic resistance
    (Wiley, 2024) Hizlisoy, Harun; Barel, Mukaddes; Dishan, Adalet; Al, Serhat; Gungor, Candan; Koskeroglu, Kursat; Disli, H. Burak
    The study aimed to assess Campylobacter jejuni prevalence in chicken meat, biofilm formation, virulence factors, antibiotic resistance, and molecular typing. In the study, 200 chicken meat samples were collected from local outlets and 51 (25.5%) isolates were identified as C. jejuni. Resistance rates to ampicillin, tetracycline, sulfamethoxazole/trimethoprim, and ciprofloxacin were 59%, 60%, 64%, and 64% respectively. Many of the isolates (49%) exhibited multidrug resistance. Beta-lactamase and tetracycline resistance genes were found in 82.3% and 86.2% of isolates, respectively. Virulence genes were detected in various proportions. Biofilm formation was weak to moderate. ERIC-PCR showed varied band profiles. Whole genome sequencing confirmed findings. The study highlights C. jejuni presence with antibiotic resistance, virulence and biofilm features in chicken meat, posing public health risks.