Investigation of antibiotic susceptibility of Salmonella spp. strains’ isolated from raw chicken meat

Babacan, Orkun; Karadeniz, Hatice

doi:10.33188/vetheder.497569

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…Extraintestinal pathogenic E. coli strains cause extraintestinal illnesses [4,5]. Because bacterial infections are stressful for poultry producers, it is necessary to boost the immune system of poultry by administering antibiotics [6]. Unfortunately, the extensive use of antibiotics as treatment or prophylactic has led to bacterial antibiotic resistance in zoonotic enteropathogens (e.g., Salmonella and Campylobacter) and commensal bacteria (e.g., E. coli and enterococci) [7].…”

Section: Introductionmentioning

confidence: 99%

Effects of embryonic thermal manipulation on the immune response to post-hatch Escherichia coli challenge in broiler chicken

et al. 2023

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Background and Aim: Thermal manipulation (TM), exposure to mild heat shock during embryogenesis, which is a critical developmental period of broiler chickens, improves tissue stability, oxidative stress response, and immune response during heat stress. Thermal manipulation could be more cost-effective than other methods to boost the immune response. This study aimed to evaluate the impact of TM during embryogenesis, concomitant with an Escherichia coli challenge, on body weight (BW), body temperature (Tb), and splenic mRNA expression of cytokines (Interleukin [IL]-1β, IL-2, IL-6, IL-8, IL-12, IL-15, IL-16, IL-18, and interferon [IFN]-γ) in poultry. Materials and Methods: A total of 740 fertile eggs were procured from a certified Ross broiler breeder. The eggs were divided into two incubation groups: the control and TM groups. The eggs in the control group were kept at 37.8°C air temperature and 56% relative humidity (RH) during incubation; eggs of the TM group were incubated under standard conditions, except for embryonic days 10–18, during which they were incubated at 39°C and 65% RH for 18 h daily. On the 7th day of incubation, eggs with dead embryos were excluded. After hatching was complete, each group was further subdivided into saline-treated or E. coli-challenged groups. The E. coli (serotype 078 with the dose of 1.5 × 105 colony-forming unit/mL) challenge was performed when the birds were 20 days old. Body weight and Tb measurements were taken on post-hatch days 20, 21, 23, and 25. Splenic mRNA expression of cytokines (IL-1β, IL-2, IL-6, IL-8, IL-12, IL-15, IL-16, IL-18, and IFN-γ) was analyzed by real-time quantitative polymerase chain reaction. Results: Following the E. coli challenge, the TM-treated group’s body performance parameters (BW and Tb) were significantly increased compared with the control group. Body weight was higher in the TM group than in the control group (p < 0.05); Tb was lower in the TM group than in the control group (p < 0.05). The mRNA levels of IL and IFN-γ were more stable and moderately induced in the TM group compared with the control group. Thermal manipulation altered the basal mRNA levels of ILs and IFN-γ and changed their expression dynamics after the E. coli challenge. Conclusion: Thermal manipulation during embryogenesis could boost the immune system response to E. coli. Keywords: broiler, challenge, Escherichia coli, immune response, incubation, thermal manipulation.

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Section: Introductionmentioning

confidence: 99%

Effects of embryonic thermal manipulation on the immune response to post-hatch Escherichia coli challenge in broiler chicken

et al. 2023

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Tavuk Kloakasında Laktozu Fermente Edemeyen Gram Negatif Bakteri Türlerinin ve Çoklu Antibiyotik Direnç Profillerinin Belirlenmesi

Sipahi

2023

Van Veterinary Journal

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Antibiyotik dirençliliği küresel bir sağlık problemidir. Özellikle tavuklar antibiyotik direncinin ve direnç genlerinin kaynağı konumundadır. Bu çalışmada kloakal swap ile alınan örneklerde laktozu fermente edemeyen Gram negatif bakteri türlerinin araştırılması ve antibiyotik direnç profillerinin belirlenmesi amaçlanmıştır. Bakterilerin tanımlanması MALDİ-TOF-MS ile yapılmış ve sonrasında çoklu ilaç direnci disk difüzyon testleri ile belirlenmiştir. Ayrıca izolatlarda genişletilmiş spektrumlu beta laktamaz, AmpC ve karbapenemaz varlığı CLSI tarama ve doğrulma testleri ile araştırılmıştır. Toplamda elde edilen 27 izolatın 20’si Escherichia coli, 4’ü E. fergusonii, 1’er izolat Pseudomonas fulva, Aeromonas media, Serratia marcescens olarak tanımlanmıştır. Çalışmada 7 ayrı sınıftan 19 farklı antibiyotik diski kullanılmış ve buna göre izolatların %63’ünde 3 veya daha fazla sınıftan antibiyotiğe karşı direnç tespit edilmiştir. En yüksek direnç oranı tetrasiklinde (%74.07) görülürken imipeneme karşı tüm izolatların duyarlı olduğu saptanmıştır. Karbapenemaz hiçbir izolatta tespit edilememişken P. fulva’da beta laktamaz ve AmpC direnci gözlenmiş ve aynı izolat blaCTX-M, CIT, blaKPC genleri yönünden PCR ile araştırılmıştır. Sadece blaCTX-M geni yönünden pozitif bulunmuştur. Sonuç olarak beta laktamaz varlığının düşük olması sevindirici olsa da bakterilerde yüksek çoklu ilaç direncine rastlanmıştır. Bu durum yeni terapötik yakalaşımlar gerektiğini düşündürmektedir. Ayrıca “Tek Sağlık” yaklaşımı düşünüldüğünde antibiyotik direncinin hayvan-insan çevre etkileşimi doğrultusunda sürekli izlenmesi ve değerlendirilmesi gerektiği ön görülmüştür. Çünkü direnç gelişimi bakteriler arasında sürekli değişim halindedir.

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Investigation of antibiotic susceptibility of Salmonella spp. strains’ isolated from raw chicken meat

Cited by 2 publications

References 14 publications

Effects of embryonic thermal manipulation on the immune response to post-hatch Escherichia coli challenge in broiler chicken

Effects of embryonic thermal manipulation on the immune response to post-hatch Escherichia coli challenge in broiler chicken

Tavuk Kloakasında Laktozu Fermente Edemeyen Gram Negatif Bakteri Türlerinin ve Çoklu Antibiyotik Direnç Profillerinin Belirlenmesi

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