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标题：Microbiological Changes during Ripening of Chihuahua Cheese Manufactured with Raw Milk and Its Seasonal Variations
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作者：Cristina Sánchez-Gamboa ; Liliana Hicks-Pérez ; Néstor Gutiérrez-Méndez 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2018
卷号：7
期号：9
页码：153-164
DOI：10.3390/foods7090153
出版社：MDPI Publishing
摘要：Chihuahua cheese is a traditional cheese produced in Northwest Mexico that is consumed shortly after production. Cheeses prepared during autumn, winter and summer were collected from five dairies, and analyzed to determine seasonal influence on proximate analysis, texture profile and the microbiological dynamic during a ripening period of 270 days. Coliforms, coagulase-positive staphylococci, molds, yeast, as well as presumptive mesophilic lactobacilli, thermophilic lactobacilli, lactococci, thermophilic cocci and enterococci, were enumerated by plate count on selective agar. Manufacturing dairy had an effect on Chihuahua cheese composition and texture profile. Seasonality influence on the microbial dynamic was observed, since the highest initial counts of coliforms (5.14 log CFU/g), coagulase-positive staphylococci (4.13 log CFU/g) and mesophilic lactobacilli (7.86 log CFU/g) were detected on summer samples. Also, ripening time affected the survival of coliforms and presumptive lactococci after 270 days (1.24 and 5.89 log CFU/g respectively) while from day 90th, coagulase-positive staphylococci were absent. Microbial changes and seasonal influence provide information on the microbiota that can influence the sensorial characteristics of Chihuahua cheese.
关键词：lactic acid bacteria; cheese ripening; foodborne indicators; Chihuahua cheese; microbial quality lactic acid bacteria ; cheese ripening ; foodborne indicators ; Chihuahua cheese ; microbial quality