The total number of bacteria refers to the colony visible to the naked eye produced by each living bacterial cell on the food on the culture medium. The total number of colonies. In fact, this "total number of bacteria" only refers to living miscellaneous bacteria, which can be used as an indicator of food pollution and freshness, and is also an important basis for judging food hygiene quality.
Coliform group or Escherichia coli: Coliform group is mainly Escherichia coli, including Enterobacter aerogenes and some intermediate bacteria. Escherichia coli comes from the intestines of humans and warm-blooded animals and is generally non-pathogenic. It is estimated that adults excrete as many as100000 coliforms from feces every day. If coliform bacteria are found in water or food, it means that the water or food is polluted by human and warm-blooded animal feces, and there may be intestinal pathogenic bacteria (typhoid Bacillus, dysentery Bacillus, etc.). If there is fecal pollution. Therefore, coliform bacteria or Escherichia coli can be used as indicator bacteria for food contaminated by intestinal pathogens. The pollution degree of coliform bacteria in food is often expressed by the number of bacteria.
Enterococci: Enterococci are a group of Gram-positive cocci in Streptococcus, with long or short chains. Streptococcus related to food, mainly Streptococcus faecalis and Streptococcus faecalis. Enterococcus mainly comes from feces. In the past and now, Escherichia coli or Escherichia coli has long been used as an indicator of fecal contamination and widely used for routine bacterial inspection of one-to-one food. However, this kind of bacteria is psychrophilic and easy to die under low temperature freezing, which reduces its due index function. Using freeze-resistant enterococci as indicator bacteria, the indicator effect is better than that of coliform bacteria, but the test method is much more complicated. In the food hygiene standards, these three different bacterial indicators have different hygienic meanings, and they are both related and different. We should make a correct judgment on the quality of food hygiene according to the actual situation.
In view of this series of food safety and hygiene standards, the microbial pathogen detection box of Guanyu Instrument is a kind of detection box specially developed for microbial pathogens designed by our company according to market demand. The box is equipped with complete sampling tools and various rapid test boxes for bacteria detection (the total number of colonies, coliform bacteria, food coliform bacteria, tableware coliform bacteria are paper, mold, yeast, salmonella, staphylococcus aureus, Escherichia coli O 157, Vibrio parahaemolyticus, Enterobacter sakazakii and Bacillus cereus).