In areas where Plasmodium falciparum is endemic, immunoglobulin G is acquired by the fetus in utero, mainly during the third trimester of pregnancy.
The potential protective effect of transferred anti-P. falciparum maternal antibodies was examined in a longitudinal study of 100 infants from birth to 1 year of age.
The probability of acquiring a P. falciparum infection and developing an episode of clinical malaria was determined in relation to the P. falciparum-specific antibody level of the infant at birth against P. falciparum schizont antigen or recombinant merozoite surface protein MSP119 antigen.
The risk of acquiring an episode of clinical malaria increased from birth to 6 months of age, after which it decreased.
The overall prevalence of P. falciparum parasitemia was highest (48.9%) in the 6-month-old infants.
The age-specific hematocrit value showed the lowest mean value (30.2) from 6 to 9 months, and the spleen rate was the highest (69.8%) at the same age.
There was a lower risk of developing an episode of clinical malaria during the first year of life in the infants with high levels of anti-MSP119 antibodies at birth.
The level of maternally derived overall anti-schizont antigen antibodies did not seem to play a role in the relative risk of developing malaria infection or disease during the first year of life, though the level of specific anti-MSP119 antibodies may be associated with protection.
Mots-clés Pascal : Plasmodium falciparum, Sporozoa, Protozoa, Anticorps, Origine maternelle, Immunisation passive, Nourrisson, Homme, Immunoprotection, Facteur risque, Paludisme, Protozoose, Parasitose, Infection, Maladie tropicale
Mots-clés Pascal anglais : Plasmodium falciparum, Sporozoa, Protozoa, Antibody, Maternal origin, Passive immunization, Infant, Human, Immunoprotection, Risk factor, Malaria, Protozoal disease, Parasitosis, Infection, Tropical disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0531950
Code Inist : 002B05E02B4. Création : 01/03/1996.