[1] Ain Shams Univ, Dept Community Med, Cairo, Egypt
[2] Inst Pasteur, Unite Epidemiol Malad Emergentes, Paris, France
[3] Natl Hepatol & Trop Med Res Inst, Cairo, Egypt
[4] Menoufia Univ, Natl Liver Inst, PCR Unit, Menoufia, Egypt
[5] Menoufia Univ, Natl Liver Inst, PCR Unit, Cairo, Egypt
[6] Menia Univ, Fac Med, Minia, Egypt