Staphylococcal infection is caused by staphylococcal infection caused by staphylococcus, a group of gram-positive cocci, which can be divided into three kinds of staphylococcus aureus, staphylococcus epidermidis and staphylococcus putrefaciens, as follows: 1. Staphylococcus aureus: a pathogenic bacterium, highly pathogenic, capable of producing a variety of exotoxins and enzymes. It is an important pathogen causing septic diseases, which can be manifested as skin and soft tissue infections, and can also lead to critical sepsis, endocarditis, meningitis and so on. 2. Staphylococcus epidermidis: a conditionally pathogenic bacteria, generally do not produce exotoxin, enterotoxin, etc., its invasive power is weak, generally not pathogenic. However, under certain conditions, it may cause disease and septicemia. 3. Staphylococcus putrefaciens: generally not pathogenic, can cause urinary tract infections. To avoid infection, pay attention to environmental and personal hygiene in life, and when there are problems such as skin trauma, it should be dealt with in time.