Copyright ©The Author(s) 2016.
World J Hepatol. Jan 18, 2016; 8(2): 117-122
Published online Jan 18, 2016. doi: 10.4254/wjh.v8.i2.117
Table 1 Hepatitis E virus genotypic characteristics
CharacteristicsGenotype 1Genotype 2Genotype 3Genotype 4
Geographic locationAfrica and AsiaMexico and West AfricaDeveloped countriesChina, Taiwan, Japan
TransmissionWater-borne, fecal oral, person to personWater-borne, fecal oral, person to personFood-borneFood-borne
Group at high risk for infectionYoung adultsYoung adultsOlder adults (> 40 yr) and males. Immuno-compromised personsYoung adults
Zoonotic transmissionNoNoYesYes
Chronic infectionNoNoYesYes
Occurrence of outbreaksCommonSmaller scale outbreaksUncommonUncommon