Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/47238
Title: Survival of Shiga Toxin-Producing Escherichia coli (STEC) Serogroups During Production and Storage of Yogurt
Authors: Celik, G.
Dikici, A.
Koluman, A.
Keywords: Yogurt
E. coli
VTEC
Acid Adaptation
Dairy Products
O157-H7
O157h7
Acid
Behavior
Milk
Manufacture
O157/H7
Strains
Cheese
Ph
Publisher: Hellenic Veterinary Medical Soc
Abstract: In this study, the survival of Escherichia coli O157:H7 and non-O157 STEC serogroups of O26, O111, O103, and O145 were investigated during production and storage of yogurt. For this purpose, pathogens were individually inoculated into milk after pasteurization along with the starter culture (approximately 7.00 +/- 1.00 log(10) cfu/g). After incubation at 44 degrees C (about 180 min), yogurt samples were capped and stored at 4 degrees C for 20 days. Pathogens were enumerated at 0, 5, 10, 15, and 20th days of storage. Lactic acid content (%) and pH of the samples were also screened. Moreover, mesophilic Lactococcus spp. and mesophilic Lactobacillus spp. were enumerated during production of yogurt. After incubation, the number of E. coli O157, O26, O103, O145, O111were 6.76 +/- 0.45, 6.64 +/- 0.53, 7.12 +/- 0.43, 6.00 +/- 1.39, 5.89 +/- 1.37 log(10) cfu/g, respectively. A significant decrease was determined in all groups during the storage of yogurt samples at 4 degrees C (p<0.05). It was detected on the 20th day of storage that the number of E. coli O157:H7 and non-O157 STEC serogroups of O103 and O145 were under the detection limit. However, STEC O26 and O111 were viable around 1.51 +/- 0.98 and 1.18 +/- 0.62 log(10) cfu/g respectively. Results of the study showed that Escherichia coli O157:H7 and non-O157 STEC serogroups might pose a potential health risk during production and storage of yogurt.
URI: https://hdl.handle.net/11499/47238
ISSN: 1792-2720
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Teknoloji Fakültesi Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File SizeFormat 
26753-505-74359-1-10-20210410.pdf622.42 kBAdobe PDFView/Open
Show full item record



CORE Recommender

SCOPUSTM   
Citations

3
checked on Dec 14, 2024

WEB OF SCIENCETM
Citations

4
checked on Dec 20, 2024

Page view(s)

70
checked on Aug 24, 2024

Download(s)

32
checked on Aug 24, 2024

Google ScholarTM

Check





Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.