parviz mohajeri department of microbiology, school of medicine, kermanshah university of medical sciences, kermanshah, ir iran samira azizkhani department of microbiology, islamic azad university, lahijan branch, lahijan, ir iran abbas farahani department of microbiology, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; student research committee, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of microbiology, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-9188495574, fax: +98-8633353132 baharak norozi department of microbiology, student research committee, kermanshah university of medical sciences, kermanshah, ir iran

Inna G Ovsyannikova Iana H Haralambieva Richard B Kennedy Megan M O'Byrne V Shane Pankratz Gregory A Poland

dejan trajkov institute of immunobiology and human genetics, faculty of medicine, university ss. cyril and methodius, skopje, republic of macedonia. aleksandar petlichkovski institute of immunobiology and human genetics, faculty of medicine, university ss. cyril and methodius, skopje, republic of macedonia. olivija efinska-mladenovska institute of immunobiology and human genetics, faculty of medicine, university ss. cyril and methodius, skopje, republic of macedonia. slavica hristomanova institute of immunobiology and human genetics, faculty of medicine, university ss. cyril and methodius, skopje, republic of macedonia. eli djulejic institute of immunobiology and human genetics, faculty of medicine, university ss. cyril and methodius, skopje, republic of macedonia. meri kirijas institute of immunobiology and human genetics, faculty of medicine, university ss. cyril and methodius, skopje, republic of macedonia.

Arpa Surapaitoon Sutas Suttiprapa Eimorn Mairiang Narong Khuntikeo Chawalit Pairojkul Jeffrey Bethony Paul J. Brindley Banchob Sripa