Parasites penetrating through skin for entry into the body are
A. Ankylostoma duodenale
B. Strongyloides
C. Round worm
D. Trichuris trichura
E. D. Medinensis
Answer. A.
Ankylostoma duodenale ; (B) Strongyloides :
Mode of infestation by nematodes
1. By ingestion of:
• Embryonated eggs contaminated in food
and drink as in A. Lumbricoides, E. Vermicularis, T. trichura
• Growing embryos in intermediate host
(Cyclops) as in D. Medinensis.
• Encysted embryos in infected pig
flesh as in T. spiralis.
2. By penetration of skin —
Filariform larvae through skin as in A
duodenale, Necator americanus.
3. By blood sucking insects as in
Filaria
4. By inhalation of dust containing
embryonated egg. as A. Lumbricoides, E.Vermicularis
