Taxonomy

 

HDV is traditionally separated into three genotypes and two subtypes. 

 

Genotype

Geographic Distribution

1

Europe, North America, Africa, parts of Asia

2

Japan, Taiwan, Russia

3

exclusively South America

 

Genotype 1 is primarily associated with a fulminant form of hepatitis, while genotype II is assoicated with everything from fulminant hepatitis to asymptomatic chronic liver disease.  In general, genotype II has less severe outcomes than genotype I.

 

http://www.cdc.gov/ncidod/diseases/hepatitis/d/index.htm