VPA 211: General Veterinary Parasitology and Helminthology (3+1)

CRISIS
Immunological phenomenon

• The infective stage (L3) can be used as vaccine after subjected to radiation treatment. Graded doses of larvae given orally or s/c will protect the animals.
• During initial infection the egg count is rising and attaining maximum in about 2 months.
• After that egg production is gradually decreases and finally the adult worms are expelled out.
• This phenomenon is similar to self-cure occurs in Haemonchus contortus.

Cutaneous Larval Migrans - Creeping Eruption: (CLM)

• Is a condition that occurs in unnatural hosts like human being especially children due to the skin penetration of larvae of A.braziliense, A.caninum, A.duodenale, Necator americana, Bunostomum trigonocepnalum and Gnathostoma spinigerum.
• During initial exposure there will be inflammatory tract, oedema, pruritus.
• But repeated exposure leads to erythematous lesion, vesicle formation and burning sensation at the site of penetration.