title: Hepatitis C virus infections and genotypes in China.
abstract: OBJECTIVE
  To define the conditions of hepatitis C virus (HCV) infections, and geographic and demographic distributions of genotypes in China.
  
  
  METHODS
  HCV infected patients were selected from individuals with different patterns of liver diseases and high risk populations in different parts of China. Genotypes of HCV in some isolates were further analyzed, based on the data from our laboratory studies and some carefully selected published literatures.
  
  
  RESULTS
  The anti-HCV positive rates were 9.7% in patients with acute hepatitis, 13.3% in patients with chronic hepatitis, 18.3% in patients with hepatocellular carcinoma, 33.0% in patients with liver cirrhosis, and 43.2% in patients with posttransfusional hepatitis (average, 16.2% in patients with liver diseases). The anti-HCV positive rates in the high risk populations were 36.4% in leukemic patients, 43.0% in hemodialysis patients, 12.7% in blood donors, 64.1% in drug abusers, 13.1% in prostitutes, and 2.57% in naturally healthy people. At least 4 clades (clades 1, 2, 3 and 6) of HCV were found in China with different geographic and demographic distributions. Genotype 1b was the most widely distributed genotype, and genotype 3 was mainly found in Yunnan Province, Southwest China.
  
  
  CONCLUSIONS
  China has a high incidence of HCV infection. Our results will provide a strategic basis for diagnosis, treatment and possibly prophylaxis of hepatitis C virus diseases.
authors: Central Laboratory, Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Kunming 650118, China. chenyd@km169.net
authors: Yuan-Ding
authors: YD
authors: Chen
authors: Ming-Ying
authors: MY
authors: Liu
authors: Wen-Lin
authors: WL
authors: Yu
authors: Jia-Qi
authors: JQ
authors: Li
authors: Mei
authors: M
authors: Peng
authors: Qing
authors: Q
authors: Dai
authors: Xiao
authors: X
authors: Liu
authors: Zhen-Quan
authors: ZQ
authors: Zhou
mesh_terms: D001782:Blood Donors / Q000706:statistics & numerical data; D002681:China / Q000453:epidemiology; D005838:Genotype; D016174:Hepacivirus / Q000235:genetics*; D006509:Hepatitis B / Q000453:epidemiology; D006526:Hepatitis C / Q000150:complications / Q000453:epidemiology / Q000209:etiology / Q000821:virology*; D006801:Humans; D015994:Incidence; D008107:Liver Diseases / Q000821:virology; D012307:Risk Factors