Seroprevalence and molecular characteristics of hepatitis E virus in household-raised pig population in the Philippines

Xiaofang Liu, Mariko Saito, Yusuke Sayama, Ellie Suzuki, Fedelino F. Malbas, Hazel O. Galang, Yuki Furuse, Mayuko Saito, Tiancheng Li, Akira Suzuki, Hitoshi Oshitani

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Background: Hepatitis E virus (HEV) infection is a significant public health concern in Asia, and swine is an important source of sporadic HEV infection in human. However, no epidemiological data are available regarding HEV infection among the swine or human population in the Philippines. To assess the HEV infection status among pigs in rural areas, we investigated the molecular characteristics and seroprevalence of HEV among household-raised pigs in San Jose, Tarlac Province, the Philippines. Result: Serum and rectal swab samples were collected from 299 pigs aged 2-24 months from 155 households in four barangays (villages) between July 2010 and June 2011. Enzyme-linked immunosorbent assay (ELISA) revealed that 50.3% [95% confidence interval (CI) 44.5-56.2%] and 22.9% (95% CI 18.2-28.1%) of pigs tested positive for anti-HEV IgG and IgM, respectively. HEV RNA was detected in the feces of 22 pigs (7.4%, 95% CI 4.7-10.9%). A total of 103 households (66.5%, 95% CI 58.4-73.8%) had at least one pig that tested positive for anti-HEV IgG or IgM or HEV RNA. The prevalence of anti-HEV IgG and IgM in breeding pig (8-24 months) were higher than that in growing pigs (2-4 months) (p

Original languageEnglish (US)
Article number11
JournalBMC Veterinary Research
Issue number1
StatePublished - Jan 27 2015
Externally publishedYes


  • Genotype 3
  • Hepatitis E virus
  • Household-raised pig
  • Philippines
  • Seroprevalence

ASJC Scopus subject areas

  • General Veterinary


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