[Plasmodium prevalence and parasitic burden in blood donors of Brazzaville, Congo].
To assess the frequency of malaria-infected blood donations in Brazzaville (Congo) thick films from all blood donors (n = 12,375, minimum per month: 857, maximum per month: 1,295; sex ratio: 9.6) at the Brazzaville University Hospital were examined quantitatively for Plasmodium (screening threshold: 20/microliters of blood) over one year (1989). The overall prevalence rate for all species of Plasmodium was 8.5%. It varied according with age but not with sex. P. falciparum predominated (92%), followed by P. malariae (7%) and P. ovale (3%). For P. falciparum: 1--the prevalence rate was 7.8% but varied over the year from 4.8% in August (6.2% for the dry season on the whole) to 11.5% in March (9.6% for the rainy season); 2--the parasitic load, also variable according to the season, was over 600/microliters in 24% of the cases (i.e. 1.9% of all donations) and over 6,000/microliters in 15 cases (i.e. 1.6% of the cases). In conclusion the proportion of blood donations infected with P. falciparum (with a parasitic load > or = 20/microliters) varied in Brazzaville from 6% in the dry season to 10% in the rainy season.
Carme
B
B
CHU d'Amiens, Hôpital Sud, Service de Parasitologie et Mycologie, France.
Kenmogne
D
D
Copin
N
N
Mbitsi
A
A
D000293:Adolescent; D000328:Adult; D000818:Animals; D001782:Blood Donors / Q000706:statistics & numerical data*; D003223:Congo / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003906:Developing Countries; D005260:Female; D006801:Humans; D015994:Incidence; D008288:Malaria / Q000453:epidemiology* / Q000469:parasitology; D016778:Malaria, Falciparum / Q000453:epidemiology* / Q000469:parasitology; D008297:Male; D008875:Middle Aged; D010965:Plasmodium malariae; D012621:Seasons
Indices plasmodiques et charges parasitaires chez les donneurs de sang à Brazzaville, Congo.