Microbiological quality of ice cream consumed in Istanbul

Abstract

Ice cream is a dairy product that is produced by freezing a mixture enriched with sugar, cream, stabilizers, emulsifiers and aroma materials. The present study was aimed at determining the microbiological quality of 150 ice cream samples (75 plain and 75 strawberry-flavored) collected from artisanal producers in Istanbul, Turkey. The samples were investigated for total mesophilic aerobic bacteria (TMAB), Enterobacteriaceae, Salmonella spp. and Listeria monocytogenes. Results showed that TMAB counts ranged from 2.0 x 101 - 2.5 x 105 cfu/g with a mean of 1.5 x 104 cfu/g, while Enterobacteriaceae count ranged from < 101 - 8.8 x 103 cfu/g with a mean of 3.0 x 102 cfu/g. Overall, 23.33% (35/150) of ice cream samples were of unacceptable quality based on recommended criteria by the Turkish Food Codex. Salmonella spp. was not determined in the samples. L. monocytogenes was detected in only one strawberry-flavored ice cream sample. The results indicated that ice cream might have been contaminated with pathogens, presenting a potential hazard for public health. Therefore, it is essential to ensure the safety of final products by improving the quality of production technology and sanitation strategies.