肝炎病因繁多,但是以病毒性肝炎较多见.它是由多种肝炎病毒所引起的一组传染病,包括甲型、乙型、丙型(非甲非乙型)和丁型肝炎,尤以甲型和乙型多发。这四型肝炎的临床症状和肝功能损伤基本类同,治疗方法也没有根本区别。然而,在病原学、流行病学、临床类型、预后及预防措施方面则有所不同。甲型肝炎属于微小 RNA 病毒科,只有一个血清型和一个抗原抗体系统。甲型肝炎 There are many causes of hepatitis, but viral hepatitis is more common, and it is a group of infectious diseases caused by many kinds of hepatitis viruses, including A, B, C (non-A and B) With A and B multiple. The four types of hepatitis clinical symptoms and liver damage basically the same, there is no fundamental difference between treatment methods. However, there are differences in etiology, epidemiology, clinical type, prognosis and preventive measures. Hepatitis A belongs to the Picornaviridae family and has only one serotype and one antigen-antibody system. Hepatitis A