Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai.China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes, and fu...Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai.China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes, and fungi.They were also examined for atlatoxin endotoxin, and potential to stimulate production of human interleukin 1β (IL-1β) and to consume complement.The concentrations of total microorganisms were consistently greater than 10~7 CFU/g and ranged from 10~7 to 10~9 CFU/g.In general, the level of microbial contamination was greater in the hay dust samples than in the rice dust samples, with bacteria being the most numerous microorganisms observed followed by molds, thermophilic actinomycetes, and yeasts.The predominant fungi were species of Aspergillus, Cladosporium, Penicillium.Trichosporon, and Cryplococcus.No significant levels of aflatoxin were observed and the isolates of A.flavus examined lack significant aflatoxigenic potential.The levels of microorganisms in these samples, the types of organisms found, and the inflammatory mediators such as endotoxin suggest that workers exposed to these dusts may be at risk for respiratory illness. 1990 Academic Press.Inc.展开更多
Introduction: This study was carried out to assess the quality of sheep meat sold to consumers in Saaba municipality. Methods: A preliminary survey consisted of assessing hygiene and sampling meat in butchers’ stores...Introduction: This study was carried out to assess the quality of sheep meat sold to consumers in Saaba municipality. Methods: A preliminary survey consisted of assessing hygiene and sampling meat in butchers’ stores. To achieve this, 100 sales outlets were surveyed for their hygiene conditions. 25 mutton meat samples were sampled in the three villages in Saaba district and analyzed using conventional microbiological techniques. The analysis consisted of determining the microbiological characteristics. Results: According to the results of this study, 100% of the butchers surveyed were men of the region. Among these men, 13% had secondary education, 46% had primary education and 41% were illiterate. Of the 100 retail outlets visited, 96% of the sellers were unaware of the hygiene rules and the dangers of microorganisms. The microbiological analysis of the samples revealed that 100% of the meat was of unsatisfactory microbiological quality. The average contamination rate by total aerobic mesophilic flora, total coliforms, Staphylococcus aureus and yeasts and molds was 8.93 × 106, 3.12 × 105, 3.69 × 106, and 6.74 × 103 CFU/g respectively. No Salmonella strain was detected in any of the samples analyzed. Conclusion: Our results pointed out the unsatisfactory safety quality of the sheep meat sold in the sheep meat and good hygiene practices.展开更多
文摘Fourteen samples of settled dust from two factories processing rice and wheat straw near Shanghai.China, were examined by dilution plating for total bacteria, gram-negative bacteria, thermophilic actinomycetes, and fungi.They were also examined for atlatoxin endotoxin, and potential to stimulate production of human interleukin 1β (IL-1β) and to consume complement.The concentrations of total microorganisms were consistently greater than 10~7 CFU/g and ranged from 10~7 to 10~9 CFU/g.In general, the level of microbial contamination was greater in the hay dust samples than in the rice dust samples, with bacteria being the most numerous microorganisms observed followed by molds, thermophilic actinomycetes, and yeasts.The predominant fungi were species of Aspergillus, Cladosporium, Penicillium.Trichosporon, and Cryplococcus.No significant levels of aflatoxin were observed and the isolates of A.flavus examined lack significant aflatoxigenic potential.The levels of microorganisms in these samples, the types of organisms found, and the inflammatory mediators such as endotoxin suggest that workers exposed to these dusts may be at risk for respiratory illness. 1990 Academic Press.Inc.
文摘Introduction: This study was carried out to assess the quality of sheep meat sold to consumers in Saaba municipality. Methods: A preliminary survey consisted of assessing hygiene and sampling meat in butchers’ stores. To achieve this, 100 sales outlets were surveyed for their hygiene conditions. 25 mutton meat samples were sampled in the three villages in Saaba district and analyzed using conventional microbiological techniques. The analysis consisted of determining the microbiological characteristics. Results: According to the results of this study, 100% of the butchers surveyed were men of the region. Among these men, 13% had secondary education, 46% had primary education and 41% were illiterate. Of the 100 retail outlets visited, 96% of the sellers were unaware of the hygiene rules and the dangers of microorganisms. The microbiological analysis of the samples revealed that 100% of the meat was of unsatisfactory microbiological quality. The average contamination rate by total aerobic mesophilic flora, total coliforms, Staphylococcus aureus and yeasts and molds was 8.93 × 106, 3.12 × 105, 3.69 × 106, and 6.74 × 103 CFU/g respectively. No Salmonella strain was detected in any of the samples analyzed. Conclusion: Our results pointed out the unsatisfactory safety quality of the sheep meat sold in the sheep meat and good hygiene practices.
