TAILIEUCHUNG - Acid adaptation protects Salmonella typhimurium from environmental stresses

Salmonella typhimurium can encounter a wide variety of environments during its life cycle. S. typhimurium can experience and survive dramatic acid stress. However, in vitro the organism is very sensitive to acid. S. typhimurium was adapted to acid by exposure to HCl at pH ± for one growth cycle. Acid-adapted cells were much better protected from acid death than control cells. | Turk J Biol 27 (2003) 31-36 © TÜB‹TAK Acid Adaptation Protects Salmonella typhimurium From Environmental Stresses Halil TOSUN, fiahika AKTU⁄ GÖNÜL Department of Food Engineering, Faculty of Engineering, Ege University, ‹zmir - TURKEY Received: Abstract: Salmonella typhimurium can encounter a wide variety of environments during its life cycle. S. typhimurium can experience and survive dramatic acid stress. However, in vitro the organism is very sensitive to acid. S. typhimurium was adapted to acid by exposure to HCl at pH ± for one growth cycle. Acid-adapted cells were much better protected from acid death than control cells. The relationship between acid adaptation of S. typhimurium and tolerance to other environmental stresses was also examined. Acidadapted cells were found to have increased tolerance to various stresses including heat, salt and organic acids. No cross-protection was noted for cold (3 ± °C). Decimal reduction times of acid-adapted and control cells at 50 °C (D50) were also examined. The D50 value of acid-adapted cells was considerably higher than that of the control cells. These results show that acid adaptation alters cellular resistance to a variety of environmental stresses. Key Words: Salmonella typhimurium, acid adaptation, environmental stresses. Salmonella typhimurium’da Aside Adaptasyonun Çevresel Streslere Karfl› Koruma Sa¤lamas› Özet: Salmonella typhimurium yaflam sürecinde çok farkl› ortamlarla karfl› karfl›ya kal›r. Konakç› ortam› d›fl›nda aside oldukça duyarl› olan Salmonella typhimurium buna ra¤men etkili asit stresinde canl›l›¤›n› sürdürebilir. S. typhimurium pH ± ’e ayarlanm›fl HCl’ye bir generasyon süresi boyunca maruz b›rak›larak aside adapte edildi. Aside adapte edilen hücreler, kontrol hücreleriyle karfl›laflt›r›ld›¤›nda, asitten kaynaklanan ölümden korunduklar› görüldü. S. typhimurium’da aside adaptasyon ile di¤er çevresel streslere karfl› kazan›lan tolerans aras›ndaki iliflkide incelendi.

• Sinh học
• Salmonella typhimurium
• Acid adaptation
• Environmental stresses
• Organic acids
• Polymyxin B
• Gen có vai trõ chẩn đoán vi khuẩn Salmonella Typhimurium
• Chẩn đoán vi khuẩn Salmonella Typhimurium
• Vi khuẩn Salmonella Typhimurium
• Môi trường nước pepton
• Điện di sản phẩm ADN plasmid
• Salmonella enterica serovar Typhimurium marT
• Red recombination system
• Biofilm structures
• MarT protein
• Periplasmic proteins
• Identification of periplasmic proteins
• Periplasmic proteins in salmonella typhimurium
• Based on the colonization pattern
• Sequencing and phylogenetic analysis
• Phylogenetic analysis
• Inv E gene
• Inv E gene of salmonella typhimurium
• α keto acids
• Ames test system
• DNA repair system
• Salmonella mutagenicity
• Tỷ lệ nhiễm Mycoplasma gallisepticum ở vịt
• Tỷ lệ nhiễm Salmonella typhimurium ở vịt
• Kháng nguyên tự chế
• Huyết thanh dương tính
• Xác định vi khuẩn Salmonella sp
• Scientific reports
• scientific research
• molecular Biology
• catalyst
• medical research
• Gen kháng thuốc
• Chủng vi khuẩn Salmonella Typhimurium
• Thịt lợn tươi
• Gen kháng kháng sinh
• Tạp chí nông nghiệp
• Khảo sát nồng độ ức chế tối thiểu
• Cao thô chiết xuất
• Thảo dược đối với Escherichia coli
• Salmonella Typhimurium và Staphylococcus aureus
• Tạp chí Sinh học
• Ngộ độc thực phẩm
• Silver graphene oxide
• Staphylococcus aureus
• Reduced graphene oxide
• Inhibitory concentration values
• Minimum inhibitory concentration
• Determination of herbal extracts against Escherichia coli
• Determination of Salmonella Typhimurium
• Determination of Staphylococcus aureus
• Eclipta prostrata L
• In silico analysis
• Immune potential
• Sequencing and in silico characterization
• Silico characterization
• OmpF protein
• BMC Genomics
• Essential genes
• Iron restriction
• Reactive oxygen species
• Antibiotic targets
• Host genetics
• Bacterial infection
• Collaborative cross
• QTL mapping
• Quantitative traits
• Mouse genetics
• Chế phẩm sinh học
• Điều trị bệnh do vi khuẩn Salmonella typhimurium
• Vi khuẩn trên gà Nòi lai
• Than hoạt tính
• Dịch chiết nấm men Saccharomyces cerevisiae
• BMC Veterinary Research
• Bacterial ghosts
• Bacterial ghosts’ applications
• Vaccination trial
• Immunological characterization
• BMC Genetics
• Conditionally essential genes
• Bacterial survival
• Enterocin KP
• Sublethal injury
• Gram negative bacteria
• UHT milk
• Escherichia coli O157H7
• tài liệu báo cáo nghiên cứu khoa học
• cách trình bày báo cáo
• kiến thức bệnh thú y
• báo cáo bệnh thú y
• các nghiên về bệnh thú ý
• 2 nitropropanol
• Salmonella gallinarum
• Shigatoxic E coli
• Niche specific virulence
• Salmonella enterica
• Zoonotic pathogen
• Human non typhoidal salmonellosis
• Public health
• Uvaria chamae
• Improved traditional Medicine