1. Types of viral hepatitis: A, B, C, D, E

2 viral hepatitis through the fecal-oral route transmission is: A, E

3. Viral hepatitis is transmitted through blood: TYPE B, C and D
4. Type D hepatitis virus is a defective virus, which can only be attached to hepatitis B virus
5. Five hepatitis B items: HBsAg, HBsAb, HBeAg, HBeAb, HBcAb
6. After infection with hepatitis B, there are three pairs of antigen and antibody systems, among which the blood examination can not detect: HBcAg
7. The marker for early diagnosis of infectious pathogens is IgM
8. The marker of late diagnosis of infectious pathogen is: IgG
9. Five hepatitis B indicators, the significance of each indicator:

①HBsAg: surface antigen, indicating that hepatitis B is in the infectious period, infectious

②HBsAb: surface antibody, the only protective antibody, indicating that hepatitis B is in convalescence or has recovered

③HBeAg: E antigen, indicating that hepatitis B virus is in active replication, highly infectious

(4) HBeAb: E antibody indicates that HBV replication is weakened and infectivity is reduced

⑤HBcAb: core antibody, divided into two types, IgM indicating early infection; IgG indicates prior infection

10. Common viruses of infectious diarrhea: Rotavirus, group A mainly infects infants; Group B mainly infected young adults

Polio is transmitted mainly through the faecal-oral route, but can also be transmitted by droplets

12. Influenza viruses are divided into a, B and C types, and A is the most easily mutated to cause a worldwide pandemic; B mutation is weak, causing epidemic and sporadic; Type C is the most stable, causing localized emission
13. Japanese encephalitis is transmitted from pigs through mosquito bites
14. Human immunodeficiency virus (HIV) primarily attacks CD4+T lymphocytes, ultimately affecting the human immune system