Aim: This work throws light on the deteriorating microorganisms in some varieties of cheeses [hard cheese (Ras cheese), and processed cheese]. Material and Method: Thirty Ras cheese and processed cheese samples were c...Aim: This work throws light on the deteriorating microorganisms in some varieties of cheeses [hard cheese (Ras cheese), and processed cheese]. Material and Method: Thirty Ras cheese and processed cheese samples were collected randomly and subjected to chemical & microbiological examination to determine its contamination with deteriorating microorganisms. Results: Chemical examination showed that the mean titratable acidity % of Ras and Processed cheese samples were 0.5 ± 0.073 and 0.93% ± 0.062%, respectively, while salt % were 3.4 ± 0.078 and 1.03% ± 0.05%, respectively. Most of samples were contaminated with high numbers of Coliforms, yeast, mold, proteolytic, lipolytic and Enterococci. Conclusion: There are poor hygienic measures during production, processing and handling of cheese.展开更多
Introduction: Due to the increasing demand for natural probiotic products, yogurt is the most popular type of fermented dairy products. Aim: Yoghurt produced using probiotic bacteria and its effect on Staphylococcus a...Introduction: Due to the increasing demand for natural probiotic products, yogurt is the most popular type of fermented dairy products. Aim: Yoghurt produced using probiotic bacteria and its effect on Staphylococcus aureus as a pathogenic microorganism is discussed as compared with traditional yoghurt. Material and method: The influence of yoghurt using starter culture on S. aureus during manufacture and storage for three brands of Lab. made yoghurt (A, B and C) was judged as excellent concerning the total acceptability. Result: The inoculated S. aureus decreases in number by the end of the storage period. In addition, the best effect of inhibition was observed in brand (B) using yoghurt starter with Lactobacillus acidophilus, followed by brand (C) using yoghurt starter L. acidophilus together with Bifidobacterium bifidum and the least effect was belonging to brand (A) using yoghurt starter only. This inhibitory effect may be attributed either to the probiotic bacteria itself or to the antibacterial substances secreted by them. Conclusion: The authors recommended the consumption of bio-yoghurt as it is not only palatable but also, safe due to improved hygienic quality.展开更多
文摘Aim: This work throws light on the deteriorating microorganisms in some varieties of cheeses [hard cheese (Ras cheese), and processed cheese]. Material and Method: Thirty Ras cheese and processed cheese samples were collected randomly and subjected to chemical & microbiological examination to determine its contamination with deteriorating microorganisms. Results: Chemical examination showed that the mean titratable acidity % of Ras and Processed cheese samples were 0.5 ± 0.073 and 0.93% ± 0.062%, respectively, while salt % were 3.4 ± 0.078 and 1.03% ± 0.05%, respectively. Most of samples were contaminated with high numbers of Coliforms, yeast, mold, proteolytic, lipolytic and Enterococci. Conclusion: There are poor hygienic measures during production, processing and handling of cheese.
文摘Introduction: Due to the increasing demand for natural probiotic products, yogurt is the most popular type of fermented dairy products. Aim: Yoghurt produced using probiotic bacteria and its effect on Staphylococcus aureus as a pathogenic microorganism is discussed as compared with traditional yoghurt. Material and method: The influence of yoghurt using starter culture on S. aureus during manufacture and storage for three brands of Lab. made yoghurt (A, B and C) was judged as excellent concerning the total acceptability. Result: The inoculated S. aureus decreases in number by the end of the storage period. In addition, the best effect of inhibition was observed in brand (B) using yoghurt starter with Lactobacillus acidophilus, followed by brand (C) using yoghurt starter L. acidophilus together with Bifidobacterium bifidum and the least effect was belonging to brand (A) using yoghurt starter only. This inhibitory effect may be attributed either to the probiotic bacteria itself or to the antibacterial substances secreted by them. Conclusion: The authors recommended the consumption of bio-yoghurt as it is not only palatable but also, safe due to improved hygienic quality.
