Thesis Type: Postgraduate
Institution Of The Thesis: Marmara University, Institute Of Health Sciences, Department Of Nutrition And Dietetic, Turkey
Approval Date: 2016
Thesis Language: Turkish
Student: MUSTAFA YÜCE
Supervisor: Burcu İrem Omurtag KorkmazAbstract:
Objective: The aim of this study was to investigate stuffed mussels sold by street venders in certain districts of Istanbul microbiologically.
Study design/ methodology:. A total of 50 samples were collected from Kadıköy, Üsküdar, Beşiktaş, Eminönü and Taksim region in Istanbul. The samples were analysed according to the conventional methods. Salmonella, Listeria spp., Campylobacter spp., Bacillus spp., Staphylococcus spp., Clostridium spp., E.coli and Total Aerobic Count (TAC) was counted. Additionally portion per stuffed mussel was measured for all of the samples.
Findings:. The mean level of contamination of TAC was 7.38±1.01 log cfu/g among the selected regions. Coliform contamination was found significantly highest in Uskudar region (p<0.05). The frequency of Staphylococcus spp. contamination (including S.aureus and S.epidermidis) was 6% and one of them was at a unacceptable high level with the count of 6 log cfu/g. B.cereus (n=1; 2.78 log cfu/g) and B.licheniformis (n=2; 3.18 log cfu/g and 3 log cfu/g) were detected among the samples. Salmonella spp., Campylobacter spp. ve Clostridium spp. were not detected, whereas one sample was contaminated with Listeria ivonovii. The gram of portion was significantly higher in Eminönü and Üsküdar regions then others (p<0.05).
Results: This study suggests that the microbiological quality of stuffed mussels are within the tolarable range in Istanbul. Portional differences might be used as a parameter in further risk assessment studies.
Keywords: stuffed mussel, Staphylococcus aureus, B.cereus, gram portion