Staphylococcus aureus

There are many types of bacteria in our lives. When it comes to eliminating bacteria, we need to start with ourselves. This will be of great help in eliminating bacteria. Bacteria are very harmful to human health. When we find that we have bacteria in ourselves, we must improve them in time, otherwise it will cause various diseases in the body. So what is Staphylococcus aureus? Many people are not very clear about Staphylococcus aureus.

When Staphylococcus aureus appears in the body, it is important to understand it in a timely manner. This will be of great help in how to eliminate it, allowing the body to develop healthily without being threatened by other things.

Staphylococcus aureus:

Staphylococcus aureus is a Gram-positive spherical bacterium. Under the microscope, Staphylococcus aureus is arranged like grape bunches. It has no spores, flagella, and most of them have no capsules. It is a common pathogen that causes food poisoning. Commonly found on the skin surface and upper respiratory tract mucosa.

Pathogenicity

Staphylococcus aureus is the most common pathogen of human suppurative infections. It can cause local suppurative infections, as well as pneumonia, pseudomembranous enterocolitis, pericarditis, and even systemic infections such as sepsis and septicemia.

The virulence of Staphylococcus aureus depends mainly on the toxins and invasive enzymes it produces:

a. Hemolytic toxins: exotoxins, divided into four types: α, β, γ, and δ, can damage platelets, destroy lysosomes, and cause local ischemia and necrosis of the body;

b. Leukocidin: can destroy human white blood cells and macrophages;

c. Plasma coagulase: When Staphylococcus aureus invades the human body, this enzyme causes the fibrin in the blood or plasma to deposit on the surface of the bacteria or coagulate, hindering the phagocytic action of phagocytes. The ease with which infections formed by staphylococci become localized is associated with this enzyme;

d. Deoxyribonuclease: The deoxyribonuclease produced by Staphylococcus aureus can withstand high temperatures and can be used as a basis for identifying Staphylococcus aureus;

e. Enterotoxins: Staphylococcus aureus can produce several types of protein enterotoxins that cause acute gastroenteritis, which are divided into five serotypes: A, B, C, D, E and F. Enterotoxin can withstand boiling at 100℃ for 30 minutes without being destroyed. The symptoms of food poisoning it causes are vomiting and diarrhea.

In addition, Staphylococcus aureus also produces epidermal lysin, gelatinase, protease, lipase, peptidase, etc.

Through the above introduction, we have a good understanding of Staphylococcus aureus. Such bacteria are very harmful to human health. Once such bacteria are formed, they pose a serious threat to all aspects of the human body. At the same time, they can cause various diseases in the human body. Enterotoxin is very easy to cause, so it must be treated in time when it appears.