Epidemiological evidence for a differential effect of hookworm species, Ancylostoma duodenale or Necator americanus, on iron status of children.
Background The hookworms, Ancylostoma duodenale and Necator americanus, cause significant gastrointestinal blood loss.
In clinical studies, greater blood losses have been reported with A. duodenale.
However, there has been no evidence that endemic A. duodenale infection has greater impact than N. americanus infection on the iron status of populations.
Methods In a sample of 525 school children in Pemba Island, Tanzania, we compared the degree of anaemia and iron deficiency associated with the two hookworm species at the individual and community (i.e. school) levels.
Multiple regression was used to control for infection intensities and other child characteristics.
Results In the 492 children with hookworm positive faecal cultures, haemoglobin and ferritin concentrations decreased with increasing proportions of A. duodenale.
Among children with only N. americanus larvae, the prevalence of anaemia was 60.5% and the prevalence of ferritin<12 mug/l was 33.1%, while in children with =50% A. duodenale larvae, the respective prevalences were 80.6% and 58.9%. When children were grouped by the prevalence of A. duodenale at the school level, children from high prevalence (=20%) schools had signficantly worse iron deficiency and anaemia than children from low prevalence schools. (...)
Mots-clés Pascal : Ankylostomiase, Nématodose, Helminthiase, Parasitose, Infection, Ancylostoma duodenale, Nematoda, Nemathelminthia, Helmintha, Invertebrata, Necator americanus, Anémie ferriprive, Hyposidérémie, Epidémiologie, Facteur risque, Enfant, Homme, Age scolaire, Tanzanie, Afrique, Fer, Hémopathie, Sidéropénie
Mots-clés Pascal anglais : Hookworm infection, Nematode disease, Helminthiasis, Parasitosis, Infection, Ancylostoma duodenale, Nematoda, Nemathelminthia, Helmintha, Invertebrata, Necator americanus, Iron deficiency anemia, Hypoferrism, Epidemiology, Risk factor, Child, Human, School age, Tanzania, Africa, Iron, Hemopathy, Sideropenia
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0395668
Code Inist : 002B05E03B3. Création : 25/01/1999.