Tissue Nematodes Flashcards
mode of transmission of subcutaneous larva migrans
penetrate human skin by infective larvae (filariform) in contaminated soil, beach, or sandbox and unprotected foot wear.
cutaneous larva migrans is due to…
nematodes belong to animal hookworms (Ancylostoma braziliense, A. caninum and Uncinaria) ,
Stronglyloides spp. (larvae currens) ,
Gnathostoma spp.
drug treatment of subcutaneouslarva migrans
oral ; albendazole, ivermectin
topical ; thiabendazole, piperazine
cyrosyrgery
visceral larva migran is due to…
ascarids of dogs, cat, pig, and racoon; ▶️ Toxocara canis ▶️ Toxocara cati ▶️ Ascaris suum ▶️ Baylisascaris procyonis
mode of transmission of toxocariasis
ingestion of eggs, larva wander in all tissue and organs
symptoms of toxocariasis
eosinophilic granulomas (around larva), fibrosis and calcification,
hepatosplenomegaly
fibrotic band in the eye
Gnathomiasis cause by….
L3 larvae of Gnasthoma spinigerum & other spp.
man is accidental
what os the pathogenesis of Gnasthostomiasis
contaminated water, raw fish, sashimi, poorly cooked chicken, contaminated water (cyclops)
what organism causes trichinellosis …
Trichinella spiralis, and other spp.
what is the definitive host for Trichinellis spiralis
rodents and pigs
pathogenesis of Trichinellis spp…
larvae penetrate wall and intestine, disseminated through circulatory system, larvae induce muscle fibre cells to nurse cells.
Angistrogyliasis cause by……
Angiostrongylus cantonensi, Angiostrongylus malayiensis, Angiostrongylus costaricensis
definitive host for Angiostrongylus spp….
rodents, snails, crustaceans, toad
