Abu-Elyazeed RR, Wierzba TF, Frenck RW, Putnam SD, Rao MR, Savarino SJ, Kamal KA, Peruski LF, Abd-El Messih IA, El-Alkamy SA, Naficy AB, Clemens JD. Epidemiology of Shigella-associated diarrhea in rural Egyptian children. Am J Trop Med Hyg. 2004 Sep; 71(3):367-72.