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Abstract

ABSTRACT


Sameel milk is a traditional fermented milk product consumed mostly in nomadic
areas of Saudi Arabia. Predominant microorganisms in the Sameel milk, responsible
for milk fermentation, were isolated and identified. A total of 29 samples of
Sameel milk were collected from three different villages in Eastern Region for
analysis. Total aerobic mesophilic bacteria Lactobacilli, Lactococci, Enterococcus
and Enterobacteriaceae were enumerated. A total of 112 Lactic Acid Bacteria
LAB and 36 yeast were isolated from Sameel milk samples. The bacteria and
yeast were identified by API 50 CHL and API 20C AUX identification systems,
respectively. Mean counts of Lactobacilli and Lactococci were
7.4 and 7.7 log10 CFU mL-1, respectively. While, the yeasts
and Enterococcus counts were relatively low and accounted for 5.7 and
5.9 log10 CFU mL-1, respectively. Low counts of Enterobacteriaceae
were encountered 2.0 log10 CFU mL-1 in 20 samples,
whereas the mean counts in other nine samples were detected at a relatively
lower magnitude i.e., 3.7 log10 CFU mL-1. The LAB species
were identified as Lactobacillus plantarum, Lactobacillus pentosus,
Lactococcus lactis ssp lactis, Lactobacillus brevis,
Lactobacillus salivarius and Lactobacillus paracasei ssp paracasei.
The predominant yeast were Candida lusitania, Cryptococcus laurentii,
Saccharomyces cerevisiae and Candida kefyr. The most frequently
isolated species was Lactobacillus plantarum 50 of total isolates
followed by Candida lusitania 41, Lactobacillus pentosus 26,
Cryptococcus laurentii 25 and Saccharomyces cerevisiae 25.

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