Induction of partial resistance in calves to Cooperia spp. by repeated intradermal injections of adult worm extract.
The effect of repeated intradermal injections of small quantities of adult worm extract on the resistance of calves to Cooperia spp. was investigated. A group of five calves injected intradermally was less resistant than a similar group inoculated twice with infective larvae, but more resistant than a group of five calves kept as worm-free controls. The resistance was reflected by worm numbers, worm lengths, inhibition percentage of L4 larvae, number of eggs per female worm, egg production and by antibody titres.
D000818:Animals; D000917:Antibody Formation; D001835:Body Weight; D002417:Cattle / Q000276:immunology*; D005243:Feces / Q000469:parasitology; D007113:Immunity, Innate; D007271:Injections, Intradermal; D008297:Male; D010270:Parasite Egg Count; D014020:Tissue Extracts / Q000008:administration & dosage*; D014251:Trichostrongyloidea / Q000276:immunology*; D014252:Trichostrongyloidiasis / Q000276:immunology* / Q000469:parasitology
D014020:Tissue Extracts