[1] Minist Hlth, Dept Med, Farwaniya Hosp, Farwaniya 81004, Kuwait
[2] Minist Hlth, Dept Infect Control, Farwaniya Hosp, Farwaniya 81004, Kuwait
[3] Minist Hlth, Dept Pathol, Farwaniya Hosp, Farwaniya 81004, Kuwait
[4] Univ Alexandria, Dept Trop Med & Hyg, Fac Med, Alexandria, Egypt
[5] Zagazig Univ, Dept Med, Fac Med, Zagazig, Egypt