Hepatitis is a disease caused by a variety of causes of liver cell degeneration, atrophy and its inflammatory body cell infiltration.
There are many factors that cause hepatitis in medicine, such as viral infection of liver disease, EBV or rubella virus, alcoholism, medicines or organic chemicals and their autoimmune elements, etc. Among them, chronic hepatitis B caused by various hepatitis viruses is more prevalent and infectious, and the damage is huge.
Second, viral hepatitis are how to spread1, hepatitis A
Hepatitis A patients and subclinical viral infections are the key infectious agents of the disease. Hepatitis A patients are most infectious in the middle and late stages of the ambulatory period and 2 to 3 weeks before the onset of neonatal jaundice. Excretory body detoxification is substantially reduced within 1 week of disease onset. The disease has no diffuse HAV virus carriers.
Patients with hepatitis A and those with subclinical viral infections are the key infectious agents of the disease. Patients with hepatitis A are most infectious in the middle and late stages of the replacement period and 2 to 3 weeks before the onset of neonatal jaundice. Excretory body detoxification is substantially reduced within 1 week of disease onset. The disease has no diffuse HAV carriers. The key mode of transmission of the disease is fecal-oral. Daily life touch is the key transmission route for polymorphic outbreaks, and heavy contamination of water resources or ingredients can cause outbreaks to flourish.
2, hepatitis B
The source of infection is mainly HBV carriers and patients with hepatitis B. HBV key menstrual blood and blood products, mother and child supplies, damaged skin and mucous membranes and sexual contact transmission. Perinatal transmission is a specific method of transmission from mother and child supplies, most often seen in pregnant women touching the plasma and blood of HBV-positive mothers during labor and delivery. Transdermal mucosal transmission arises critically from the application of medical equipment that has not been sterilized by strict disinfection, injection needles, invasive diagnostic and surgical procedures, and its intravenous intravascular methamphetamine indiscriminate use. The daily work or daily life touch, such as a personnel work (including the same use of computers and other office equipment), shaking hands, embrace, *** live in a dormitory, the same restaurant meals and the same restroom and so on without blood night exposure touch, is generally not easy to get infected with HBV. blood-sucking insects (mosquitoes, cockroaches and so on) transmission has not been confirmed.
3, hepatitis C
The source of infection is mainly hepatitis C patients and asymptomatic HCV virus infection. The key methods of transmission include intravenous and blood product transmission and transmission through damaged skin and mucous membranes. A portion can be transmitted sexually and from mother to child.
4, hepatitis D
The key sources of infection are patients with hepatitis B or diffuse HBsAg virus carriers who have been infected with HDV. The key according to the intravenous injection and the use of blood products transmission, daily life touch is also very likely, perinatal transmission is rare.
5, hepatitis E
Genotypes I and II hepatitis E infections are patients with hepatitis E and subclinical viral infections, III and IV key infections are patients and swine, cows, sheep, rodents may also be the natural hosts of HEV, and become the source of polymorphic hepatitis E infection. Key by fecal-oral transmission, HEV with the patient feces out of the environment, environmental pollution of ingredients, water resources caused by the release or outbreaks when the rise, the peak of the disease is mostly in the rainy season or after flooding.