Plasmodium falciparum circumsporozoite antibody prevalence in Madagascar: a longitudinal study in three different epidemiologic areas.
A longitudinal study on the prevalence of Plasmodium falciparum circumsporozoite antibodies (Ab-CS) was carried out in 15 villages of three epidemiologic areas of Madagascar: the highlands, east coast, and the southwest region. A total of 3,967 blood samples were collected from November 1989 to April 1991 from cohorts of resident schoolchildren. The prevalence of Ab-CS in the examined population varied greatly according to the different ecoepidemiologic areas of the country. A correlation analysis was made between Ab-CS and P. falciparum parasite prevalence in the same population. High Ab-CS prevalence rates (25-75%) and levels (optical density = 0.28-0.76) were observed in the villages of the east coast (mesoendemic stable malaria). The Ab-CS prevalence rates varied from 0 to 37% in the highlands and southwest region villages (unstable malaria). The use of Ab-CS prevalence is proposed to be a useful and reliable seroepidemiologic marker of malaria endemicity in those areas of Madagascar in which malaria transmission is high and continues for more than four months a year.
Romi
R
R
Laboratorio di Parassitologia, Istituto Superiore di Sanita, Rome, Italy.
Sabatinelli
G
G
Majori
G
G
Ralamboranto
L
L
Raveloarifera
F
F
Ranaivoharimina
H
H
D000293:Adolescent; D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood*; D000953:Antigens, Protozoan / Q000276:immunology*; D002648:Child; D015331:Cohort Studies; D005843:Geography; D006801:Humans; D008137:Longitudinal Studies; D008270:Madagascar / Q000453:epidemiology; D016778:Malaria, Falciparum / Q000453:epidemiology*; D010963:Plasmodium falciparum / Q000276:immunology*; D015995:Prevalence; D015800:Protozoan Proteins / Q000276:immunology*; D016036:Seroepidemiologic Studies
D000913:Antibodies, Protozoan; D000953:Antigens, Protozoan; D015800:Protozoan Proteins; C041595:circumsporozoite protein, Protozoan