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Öğe Beyaz peynir, çiğ süt, kıyma ve İnegöl köftede Staphylococcus aureus kaynaklı intoksikasyon riskini değerlendirmede kültür ve immunolojik yöntemlerin karşılaştırılması(Selçuk Üniversitesi Veterinerlik Fakültesi, 2018) Telli, Nihat; Yörük ,Nuray Gamze; Telli, Arife Ezgi; Cebirbay, Muhammed Ali; Güner, AhmetAmaç: Konya’da tüketime sunulan beyaz peynir, çiğ süt, kıyma ve İnegöl köfte örneklerinin fiziksel, kimyasal ve mikrobiyolojik kalitelerinin ortaya konması ve Staphylococcus aureus (S. aureus) kontaminasyonu ile toksin varlığının tespiti amaçlanmıştır. Gereç ve Yöntem: Araştırmada beyaz peynir (n=50), çiğ süt (n=50), kıyma (n=50) ve İnegöl köfte (n=50) olmak üzere 200 numune kullanılmıştır. Numuneler fiziksel ve kimyasal (pH, asidite ve kuru madde) ve mikrobiyolojik [toplam mezofilik aerobik bakteri (TMAB), toplam psikrofilik aerobik bakteri (TPAB), koliform, laktik asit bakterisi (LAB), S. aureus] açıdan değerlendirilmiştir. Stafilokokal enterotoksinlerin (SEs) varlığı enzymelinked fluorescent immunoassay’a (ELFA) dayalı VIDAS Staph enterotoksin kiti ile araştırılmıştır. Bulgular: Çiğ süt, beyaz peynir, kıyma ve İnegöl köftelerde ortalama pH değerleri sırasıyla, 6.53, 4.82, 5.99 ve 6.63; kuru madde değerleri % 12.51, % 37.71, % 38.97, % 49.70 ve laktik asit cinsinden asiditeleri de % 0.16, % 0.67, % 0.08 ve % 0.40 olarak bulundu. TMAB sayıları 4.53 - 9.86 log10kob/g-ml; TPAB 3.39 - 7.69 log10kob/g-ml; koliform bakteri 2.04 - 8.53 log10kob/g-ml; LAB 2.90 - 7.64 log10kob/g-ml ve S. aureus sayıları 2.61 - 6.46 log10kob/g-ml arasında bulundu. İnegöl köfte örneklerinin 1’i (% 2) ve kıyma örneklerinin 29’unda (% 58) SEs tespit edildi. Öneri: S. aureus'un tüm suşlarının SE’lerin üretiminden sorumlu olmamalarından dolayı stafilokokal gıda intoksikasyonlarının değerlendirilmesinde ve güvenli gıda üretiminde kültürel yöntemlerle birlikte SE varlığının araştırılmasının da önemli olduğu düşünülmektedir.Öğe Epitope mapping of Campylobacter jejuni flagellar capping protein (FliD) by chicken (Gallus gallus domesticus) sera(ELSEVIER SCI LTD, 2016) Yeh, Hung-Yueh; Telli, Arife Ezgi; Jagne, Jarra F.; Benson, Christopher L., II; Hiett, Kelli L.; Line, John E.Campylobacter jejuni, a Gram-negative rod, is a zoonotic pathogen associated with human acute bacterial gastroenteritis worldwide. The flagellum, composed of more than 35 proteins, is responsible for colonization of C. jejuni in the host gastrointestinal tract as well as inducing protective antibodies against the homologous serotype. In our previous study, we demonstrated that the flagellar capping protein (FliD) is an immunodominant protein that reacted strongly to sera from field chickens. In this communication, we mapped linear immunoreactive epitopes on FliD using a set of 158 synthetic peptides of 15-mer overlapping with 11 amino acid residues on peptide microarrays with sera from field chickens. The results from peptide microarrays showed (1) no cross-reactivity of the immobilized peptides with the secondary anti-chicken antibody in the control incubation, and (2) heterogeneous patterns of sera reacting to the immobilized peptides. The peptides that reacted to more than three chicken sera and had higher averages of fluorescence units were selected for further validation by the peptide ELISA. The results showed peptides 24, 91 and 92 had relatively high reactivity and less variation among 64 individual serum samples, indicating these peptides represented the shared immunodominant epitopes on the C. jejuni FliD protein. These peptides were also recognized by sera from chickens immunized with the purified recombinant FliD protein. The findings of the specific shared linear immunodominant epitopes on FliD in this study provide a rationale for further evaluation to determine their utility as epitope vaccines covering multiple serotypes for chicken immunization, and subsequently, for providing safer poultry products for human consumption. Published by Elsevier Ltd.Öğe Occurrence and antibiotic susceptibility of Vibrio spp., Aeromonas spp. and Listeria spp. in seafoods(Selçuk Üniversitesi, 2022) Telli, Nihat; Telli, Arife Ezgi; Biçer, Yusuf; Turkal, Gamze; Kahraman, Hatice Ahu; Doğruer, YusufAim: In this study, it was aimed to determine the presence of Vibrio spp., Aeromonas spp., and Listeria spp. in finned fish and shrimps consumed in Turkey and the antibiotic resistance profile of the isolates using disc diffusion method. Materials and Methods: In the research, 300 seafoods obtained at different times were used as material. Following isolation by classical cultural method, classical PCR was performed to confirm the isolates at genus level and to identify at species level for pathogenic species. Results: Finfish and shrimp samples were contaminated with Vibrio spp., Aeromonas spp. and Listeria spp. with the rate of 19.4% (33/170), 14.7% (25/170), 4.1% (7/170) and 13.8% (18/130), 13.1% (17/130), 6.2% (8/130), respectively. Twenty-nine (9.7%) and 9 (3.0%) of the Vibrio spp. isolates were identified as V. parahaemolyticus and V. cholerae, respectively. Thirty (10%) of the Aeromonas spp. isolates were detected as A. hydrophila. L. monocytogenes and V. vulnificus was not detected in any of samples. Antibiotic resistance profile of the V. parahaemolyticus, V. cholerae, A. hydrophila and Listeria spp. isolates was streptomycin (71.4%), teicoplanin (71.4%), ampicillin (87.5%), teicoplanin (75%); streptomycin (80%), ampicillin (75%), cefixime (75%), penicillin (75%), sulfamethoxazole/trimethoprim (100%), tetracycline (75%); erythromycin (93.8%), vancomycin (81.2%), amoxacillin/clavulanic acid (78.6%), ampicillin (85.7%), cephalothin (92.9%), penicillin G (92.9%); and cephalothin (37.5%-42.9%), erythromycin (37.5%-42.9%), penicillin G (37.5%-42.9%), tetracycline (37.5%-42.9%), respectively. Conclusion: As a result, it is thought that fish and shrimp consumed in Turkey may be contaminated with pathogenic Vibrio and Aeromonas species, and antibiotic-resistant isolates may pose a risk to public health.
