Bacteriological quality of UHT-milk at Giza city

Fourty random samples of UHT-milk, collected from different groceries and supermarkets in Giza City were examined for their bacteriological quality. The bacteriological examination of samples revealed that, the mean value of mesophilic bacterial count, coliform content and aerobic spore formers count were 2.92X 10[4], 1.82 X 10[3] and 9 X 10[3] respectively. Escherichia coli, Enterobacter aerogenes, Ent. cloacae, Klebsiella aerogenes, K.ozoenae and K.oxytoca could be isolated at varying percent ages ranging from 2.5 to 10% while Bacillus subtilis, B. coagulans, B. brevis, B.cereus, B.firmans, B.larvae and B.polymyxa were isolated at varying percentages ranging from 7.5 to 47.5%. Also anaerobic spore formers could be detected in 22.5% of samples. The public health and economic importance of existing organisms as well as the suggested control measures were discussed

Thermophilic bacteria in market raw milk at Giza city

Fifty random samples of market raw milk, collected from different retail outlets in Giza city were examined for the presence of thermophilic bacteria. The obtained results revealed contamination of 84% of the examined samples with thermophiles, with a mean count of 8.50 X10[2] +/- 2.57 X 10[2] /ml. The highest frequency distribution [57.14%] lies within the range 10[2] - 10[3]. B.subtilis, B.stearothermophilus, B.pumilis, B.lichen formis, B.coagulans, B.alvei, Strept. thermophilus, L.bulgaricus and L.acidophilus could be isolated from the examined samples at different percentages [5-21.25%]. The economic and public heath importance of the isolated organisms, as well as the suggested control measures were discussed

Microbiological status of chocolate and fruity milks

Fifty random samples of chocolate and fruit milks [25 each] collected from different shops at Giza city, were examined. The mean TCC, ASFC, TYC and TMC found/ml in chocolate and fruit milks were 3.12x10[3] and 1.64x10[3], 3.79x10[3] and 2.88x10[3], 0.45x10[2] and 0.51x10[2] and 0.90x10[2] and 0.32x10[2] respectively. Anaerobes were detected in 40% and 20% of chocolate and fruit milk samples respectively. Bacillus brevis, B. stearothermophilus, B. subtilis, B. cereus, B. coagulans and B. mycoides could be isolated at varying percentages. Out of 50 samples examined, 11 samples proved to contain micrococcus spp, while staphylococcus aureus and staph. epidermidis failed detection. Coliforms could not be detected in all examined samples. Yeasts belonging to the genera saccharomyces, Trichosporon, Torulopsis, and Cryptococcus could be isolated at varying percentages. While moulds belonging to the genera Penicillium, Scopulariopsis, Verticillium, Aspergillus, Fusarium and Mucor were isolated. The public health importance of existing microorganisms, their effect on the products as well as suggested control measures were discussed

Microbiological studies on market hen eggs

One hundred and fifty market hen eggs collected from different localities in Cairo and Giza were examined microbi logically. Obtained results revealed that the mean values of aerobic bacterial count, coliform content [MPN/ml], staphylococcal count and mold and yeast count were 52.17 x 10[4], 96.25, 168.57 and 115.71/ml respectively. S. pullorum, proteus vulgaris and P. mirabilis could be isolated from 0.66, 6.66 and 5.33 percent of examined samples respectively, while Escherichia coli, Enterobacter cloacae, Citrobacter freundii, Klebsiella oxytoca, K. ozoenae and Pseudomonas spp could be isolated at varying percentages [2%-12%]. Staphylococcus aureus and Staph. epidermidis could be isolated from 3.33% and 23.33% respectively, while the genera Penicillium, Asperigillus, Cladosporium, Ascopularsis, Helmenthosporium and Mycelia sterilia could be isolated at different percentages ranging from 2.66% to 40%. Strict hygienic measures should be adopted in the farm during production and handling to improve the quality of produced eggs