R Wang J Epstein F M Baraceros E J Gorak Y Charoenvit D J Carucci R C Hedstrom N Rahardjo T Gay P Hobart R Stout T R Jones T L Richie S E Parker D L Doolan J Norman S L Hoffman

behrouz naeimi department of microbiology and parasitology, faculty of medicine, bushehr university of medical sciences, bushehr, ir iran; the persian gulf tropical medicine research center, bushehr university of medical sciences, bushehr, ir iran farnaz mazloom kalimani student research committee, bushehr university of medical sciences, bushehr, ir iran ali akbar pourfatolah department of immunology, faculty of medical sciences, tarbiat modares university, tehran, ir iran masoud azimzadeh student research committee, bushehr university of medical sciences, bushehr, ir iran alireza mankhian bushehr blood transfusion organization, bushehr, ir iran samad akbarzadeh department of biochemistry, faculty of medicine, bushehr university of medical sciences, bushehr, ir iran

ramezan ali ataee department of medical microbiology, faculty of medicine, baqiyatallah university of medical sciences, tehran, ir iran reyhane kashefi department of microbial biotechnology, faculty of science, payame noor university, tehran, ir iran; department of microbial biotechnology, faculty of science, payame noor university, tehran, ir iran. tel: +98-989122190418, fax: +98-2126127258 gholam hossein alishiri department of rheumatology, faculty of medicine, baqiyatallah university of medical sciences, tehran, ir iran davoud esmaieli department of medical microbiology, faculty of medicine, baqiyatallah university of medical sciences, tehran, ir iran

shahnaz armin pediatric infections research center, shahid beheshti university of medical sciences, tehran, ir iran; pediatric infections research center, mofid children’s hospital, tehran, ir iran. tel: +98-9121099758, fax: +98-2122226941سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) farhad mahvelati shamsabadi pediatric infections research center, shahid beheshti university of medical sciences, tehran, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) azadeh kiomarci pediatric infections research center, shahid beheshti university of medical sciences, tehran, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) farzane jadali pediatric infections research center, shahid beheshti university of medical sciences, tehran, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences)

ghasem mosayyebi from the dept. of immunology, school of public health, tehran university of medical sciences jafar forghanizadeh the dept. of rheumatology, hazrate rasool hospital, iran university of medical sciences banafsheh gholestan the dept. of statistics and epidemiology, school of public health, tehran university of medical sciences, tehran, i.r. iran. fazel shokri from the dept. of immunology, school of public health, tehran university of medical sciences

Y Cui L J Chang