Review Article

Helminth Parasites Alter Protection against Plasmodium Infection

Table 2

Prevalence of common helminths in the world. These are estimates of the number of people with active infections. The number of people potentially exposed or with subclinical helminthic infections is much higher.

HelminthEstimated number of infected peopleRef.

NematodesAscaris lumbricoides 1450 billion[77]
Trichuris trichiura 1050 million[77]
Ancylostoma duodenale 740 million[78]
Trichinella spiralis 600 million
Necator americanus 576 million[1]
Brugia malayi 157 million[1]
Wuchereria bancroftiand Brugia malayi 120 million[79]
Strongyloides stercoralis 100 million[80]
Onchocerca volvulus 37 million [81]
Loa loa 13 million[1]

TrematodesSchistosoma spp. 207 million[82]
Fasciola hepatica 17 million

CestodesTaenia spp. 0.4 million[81]
Hymenolepis nana 75 million  
Echinococcus spp. 2–3.6 million[83]