Bacteria

Staphylococcus aureus is a gram-positive bacterium, which is a pathogenic bacterium that can cause a variety of animal diseases, and is also easily affected by humans. S. aureus is widely distributed and can exist in soil, water and other places. Staphylococcus aureus is an opportunistic pathogen, which is carried by most healthy animals, but some Staphylococcus aureus can produce harmful enzymes and pathogenic factors, making animals susceptible to infection and causing disease, which are mainly characterized by breast trauma, injury Diseases with various symptoms such as infection, sepsis, intestinal inflammation and shock syndrome caused by toxins.

Salmonella is a gram-negative bacterium belonging to the family Enterobacteriaceae. It can not only infect animals in a dominant or recessive manner, but also cause human food poisoning when humans eat contaminated animal-derived food, which poses a serious threat to public health and safety. serious threat. Salmonella is the second leading cause of food poisoning, accounting for 42.6% to 60% of bacterial food poisoning. Listed by WHO on the list of severe and moderate risk foodborne pathogens.

Escherichia coli is a pathogen that causes enteritis, belongs to the bacterial family Hepatobacter, and is a gram-negative bacteria. Infection with the virus can cause serious damage to human health. Pathogenic E. coli strains can cause a variety of intestinal and extraintestinal infections in humans and animals. For example: Enterohemorrhagic Escherichia Coli (EHEC) is a Shiga toxin-producing Escherichia coli that can cause severe intestinal diseases (such as hemolytic uremic syndrome and hemorrhagic colitis) and lead to acute kidney disease functional failure and death. Some extraintestinal pathogenic Escherichia coli can cause urinary tract infections, meningitis and other diseases. In animals, E. coli is a common cause of intra-udder infection in dairy cows, which usually results in severe clinical mastitis.