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Epidemiology of Rotavirus in Guayaquil, Ecuador

Hiroshi Suzuki^*, Tetsuo Sato, Setsuko Kitaoka, Fumiyo Tazawa^*, Tasuke Konno, Yasuzi Amano, Aracely Alava Alprecht^||, Ernesto Gutiérrez Vera^||, Jorge Lopez Villalta^||, Yoshio Numazaki AND Nakao Ishida^**

^* Departments of Pediatrics
^** Bacteriology, Tohoku University School of Medicine
Department of Pediatrics, Research Institute for Tuberculosis and Cancer, Tohoku University, Sendai, Japan
Virus Laboratory, National Sendai Hospital, Sendai, Japan
Laboratory Center, Akita University School of Medicine, Akita, Japan
^< National Institute of Hygiene Leopordo Izquietal Perez, Guayaquil, Ecuador

Detection of rotavirus by electron microscopy was conducted with fecal specimens from 1,722 infants and young children with acute diarrhea, during a 41-month survey from April 1978 through December 1981 in Guayaquil, Ecuador; 376 of these specimens (21.8%) were positive. The detection rate was higher during the dry season (May to November; 25.2%) than during the rainy season (December to April; 14.7%). When rotaviruses isolated from 59 patients hospitalized with diarrhea (from April 1979 to July 1981) were subjected to genome RNA analysis by polyacrylamide gel electrophoresis, a single dominant electropherotype was found with other less common electropherotypes. An atypical rotavirus with a unique property was also found.

Accepted for publication October 17, 1985.