Food Microbiology

Lab Report
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Food Microbiology is the study of the microorganisms which inhabit, produce or contaminate food items. These microorganisms may be deleterious and are responsible for food spoilage. On the other hand, some of these microorganisms are essential for preparing various food items especially the dairy products like cheese, yoghurt and other fermented foods like bread and various beverages like beer and wine (Roberts, D, 2003).


Results indicate the overall standard in terms of hygiene of food processing and the food chain. The microbial levels permitted for food to be determined safe are regulated by law. The study is carried out in three stages performed as three experiments. In the first experiment, aerobic plate count is done for E.coli count and coliform count on given food item (Roberts, D, 2003, Gilbert et al, 2000). It is evident that coliforms and E.coli are present in human faeces. Their presence in food items can indicate post processing contamination. The aerobic count is used to determine the overall level of microbial contamination of food items and provides an indication for poor processing or post processing techniques especially where the count exceed the legal permitted levels. In the second experiment pre-cooked food is observed for faecal contamination. In the third experiment the quality of milk samples (pasteurized and raw) are checked for the presence of fecal contamination.
The Petri dish with colonies between 15 and 300 were selected to be significant in number whereas Petri plates with TMTC (too many to count) were not considered to be significant. Calculation is performed with the formula mentioned. ...
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