Table 1. Human helminth infections of public health importance.
Helminth species | Disease or condition in
humans |
Estimate prevalence
worldwide |
Habitat of adult worm
in humans |
---|---|---|---|
Nematodes | |||
Ascaris lumbricoides | Ascariasis | 804 million | Small intestine |
Ascaris suum | |||
Trichuris trichiura | Trichuriasis | 477 million | Large intestine |
Enterobius vermicularis | Enterobiasis (Oxyuriasis) | >200 million | |
Toxocara canis | Visceral or ocular larva
migrans |
Unknown | N/A |
Necator americanus | Necatoriasis | 472 million | Small intestine |
Ancylostoma duodenale | Ancylostomiasis | ||
Ancylostoma ceylanicum | |||
Strongyloides stercoralis | Strongyloidiasis | 30–100 million | |
Wuchereria bancrofti | Lymphatic filariasis | 44 million | Lymphatic vessels |
Brugia malayi or Brugia timori | |||
Onchocerca volvulus | Onchocerciasis (river
blindness) |
17 million | Subcutaneous tissue |
Trichinella spiralis | Trichinellosis | 0.066 million | Small intestine |
Trematodes | |||
Schistosoma mansoni | Intestinal schistosomiasis | 206 million | Mesenteric veins |
Schistosoma haematobium | Urogenital schistosomiasis | Venous plexus of urinary
bladder |
|
Schistosoma japonicum | Intestinal schistosomiasis | Mesenteric veins | |
Fasciola hepatica | Fascioliasis | 80 million | Bile ducts |
Clonorchis sinensis | Clonorchiasis | Bile ducts and gall
bladder |
|
Opisthorchis spp. | Opisthorchiasis | ||
Paragonimus spp. | Paragonimiasis | Lungs | |
Cestodes | |||
Echinococcus granulosus | Hydatid disease | 0.8 million | N/A |
Echinococcus multilocularis | Alveolar echinococcosis | 0.019 million | N/A |
Cysticercus cellulosae
( Taenia solium larva) |
Cysticercosis and
Neurocysticercosis |
1 million | N/A |
Taenia solium | Intestinal taeniasis | 0.38 million | Small intestine |
N/A, not applicable. There is no development of adult worms in humans.