1. Human disease caused by parasites
Predominant intestinal parasites
Intestinal entry and maturation
Intestinal entry, disease elsewhere
Larval stage leaves the gut
Skin entry, gut manifestations
Mature stage enters the gut
Skin entry, disease elsewhere
Dissemination
Failure to complete life cycle

2. Predominant intestinal parasites
Intestinal worms:
ascaris lumbricoides
trichuris trichiuria
taenia saginata
enterobius vermicularis
Intestinal protozoans
giardia lamblia
cryptosporidium parvum
entamoeba histolytica

3. Human disease caused by parasites
Intestinal entry, disease elsewhere
acquired toxoplasmosis
hydatid disease (echinococcus)
cysticercosis (taenia solium)
visceral larva migrans (Toxocara canis)
trichinosis (trichinella spiralis)
Skin entry, intestinal manifestations
Hookworm
Strongyloides
Schistosoma mansoni

4. Human disease caused by parasites
Skin entry, localized disease
Leishmaniasis
Filariasis
Skin entry, disease by dissemination
Malaria
Trypanosomiasis
Schistosomiasis

5. Intestinal Parasites : mode of infection
Ingestion of cysts, oocysts or ova
Entry of larvae or oncospheres
Site of adult stage or disease
Cryptosporidium
Giardia
Amoebiasis
Intestine
Toxoplasmosis Visceral larva migrans
Trichinella Ingested
Disseminated
Ascaris
Trichuris
Enterobius
Hookworm Strongyloides
through skin

6. Symptoms Parasite Abdominal pain and distension Giardia
Cryptosporidium
Amoebiasis
Ascaris, hookworm, taenia
Diarrhoea +/- malabsorption
Strongyloides
Diarrhoea with blood loss
Trichuris
Hookworm
Tenesmus, prolapsed rectum

7. Intestinal parasites: Symptoms

8. Intestinal Parasites : Symptoms

9. Intestinal Parasites : Surgical Symptoms