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Epidemiological survey of rotavirus and enterovirus infections in kenyan children


, : Epidemiological survey of rotavirus and enterovirus infections in kenyan children. Journal of the Iwate Medical Association 37(3): 359-370

The results of epidemiological survey of rotavirus and enterovirus infections in Mombasa (from June 1981 to April 1982) and in Nyeri (from September 1981 to April 1982), Kenya, are reported. Mombasa is the largest port in East Africa. The climate is tropical. Nyeri is a highland town close to the equator in central Kenya. The climate is rather cool. Fecal specimens were collected from patients with gastroenteritis and with other diseases under 5 years old age. Rotavirus was detected in 124 (21.7%) out of 572 patients with gastroenteritis. A regional difference in detection rates could not find between the two areas (22.0% in Mombasa and 21.2% in Nyeri). Rotavirus was significantly detected at higher rate from patients with gastroenteritis than from control group. The highest detection rate was observed in January (38.5%) followed by September (29.4%). Rotavirus positive rates had a tendency to increase in dry season. Enteroviruses were isolated in 91 (19.0%) out of 480 children in Mombasa (from June 1981 to March 1982) and in 24 (9.6%) out of 250 children in Nyeri (from September 1981 to March 1982). A clear regional difference in frequency of enterovirus infections was observed (x2 = 10.4, P < 0.005). Enteroviruses were isolated every month except in September in Nyeri. The highest positive rate was observed in November in both areas (32.4% in Mombasa and 30.3% in Nyeri). It is a rainy season. The association of gastroenteritis and enteroviruses could not observe in this survey. The serotype identification of enteroviruses was attempted from the strains that were collected until December 1981. Polioviruses were only isolated from 9 (1.9%) out of 483 children. The enteroviruses isolated consisted of various serotypes with a few strains, but Coxsachievirus B5 was isolated almost every month only in Mombasa during the survey period.

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