Hepatitis refers to an inflammatory condition of the liver. It is commonly caused by a viral infection from one of five unrelated hepatotropic viruses: hepatitis A (HAV), hepatitis B (HBV), hepatitis C (HCV), hepatitis D (HDV) and hepatitis E (HEV). HAV is an acute, short-term disease, which is commonly transmitted by consuming food or water contaminated by feces from an infected person. HBV and HCV are transmitted through direct contact with infectious body fluids such as blood, or semen, and typically lead to an ongoing, chronic form of liver disease. HDV is a rare form of hepatitis that only occurs in conjunction with HBV infection as the virus cannot multiply without the presence of HBV. HEV is a waterborne disease mainly found in areas with poor sanitation and typically results from ingesting fecal matter that contaminates the water supply. The disease is usually acute but can be particularly dangerous in pregnant women. meridian life science我们使外包变得容易子午线生命科学有限公司提供的服务范围包括：抗体和生物研究试剂的定制和合同生产蛋白质表达服务（病毒抗原，大肠杆菌，杆状病毒，酵母和哺乳动物）体外和体内抗体生产发酵和细胞培养服务 合同服务，包括上游和下游的过程开发功能蛋白质纯化服务蛋白质表征 试点，扩大规模和商业规模 细胞和病毒银行