Academic journal article Iranian Journal of Public Health

ISOLATION AND IDENTIFICATION OF ENTEROCOCCUS SPECIES FROM TRADITIONAL DAIRY PRODUCTS IN EAST-AZERBAIJAN, Iran

Academic journal article Iranian Journal of Public Health

ISOLATION AND IDENTIFICATION OF ENTEROCOCCUS SPECIES FROM TRADITIONAL DAIRY PRODUCTS IN EAST-AZERBAIJAN, Iran

Article excerpt

Background: This study was conducted to determine the prevalence and diversity of Enterococci isolated from a variety of traditional dairy products.

Methods: A total of 90 samples consisting of cheese, yogurt, butter, cream, Kashk and butter milk were collected throughout East-Azarbaijan province. After preparation of sample suspensions/emulsions, they were cultured on Kan- amycin Aesculin Azide agar plates. Typical colonies were subjected to standard morphological and biochemical tests such as Gram staining, catalase, growth in the presence of 6.5% salt, esculin hydrolysis, H2S production, motility, pig- ment production, acid production from L-arabinose, manni- tol, lactose, D-raffinose, sucrose, argenine dihydrolysis, growth in the presence of 0.04% potassium tellurite and abil- ity to growth in 4 °C.

Results: High loads of Enterococci contamination was found in most of the samples. Butter and cheese specimens demon- strated the highest contamination levels; meanwhile, the con- tamination level was the lowest in yogurt samples. …

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