Plasmodium ovale in a highly malaria endemic area of Senegal.
During 4 months, from June to September 1990, the population of Dielmo village, Senegal, an area of intense and perennial malaria transmission, was enrolled in a follow-up study including daily clinical surveillance and bi-weekly malaria parasitaemia monitoring. Thick blood film examinations indicated that 48.5% of children (49/101) and 32.4% of adults (34/105) were infected at least once by Plasmodium ovale during the study period; 148 distinct episodes of patent parasitaemia were observed, with estimated maximum durations of 3-115 d. The mean duration at first decreased significantly with age, from 11.4 d in children under 5 years old to 4.2 d in adults aged 40-59 years, but then increased in older adults to 7.0 d. In all age groups, most infections were asymptomatic. Only high parasitaemias were significantly associated with fever; 3 clinical malaria attacks due to P. ovale were seen during the study period.
Faye
F B
FB
Laboratoire de Paludologie, ORSTOM, Dakar, Sénégal.
Konaté
L
L
Rogier
C
C
Trape
J F
JF
D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D002675:Child, Preschool; D005334:Fever / Q000209:etiology; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008288:Malaria / Q000175:diagnosis / Q000453:epidemiology / Q000469:parasitology*; D008875:Middle Aged; D018512:Parasitemia / Q000276:immunology; D010274:Parasitology / Q000379:methods; D010961:Plasmodium / Q000145:classification / Q000276:immunology*; D012423:Rural Health; D012675:Senegal / Q000453:epidemiology