Trichostrongylus colubriformis and Heligmosomoides polygyrus: relationship between infectivity and exsheathment during ageing of infective larvae.
Infective larvae of two trichostrongyle parasites of the small intestine were stored from 0 to 22 weeks at 24 degrees C for T colubriformis and from 0 to 82 weeks at 4 degrees C for H polygyrus. A loss in infectivity with ageing was observed in vivo as well as a decrease in the exsheathment potential (number of larvae exsheathed in vitro after 20 min of incubation). A linear regression was established between the number of larvae exsheathed in vitro within 20 min and the number of adult worms developed in vivo.
Lesage
M C
MC
Institut National de la Recherche Agronomique, CR de Tours-Nouzilly, Monnaie, France.
Mallet
S
S
D000818:Animals; D006369:Heligmosomatoidea / Q000502:physiology*; D007814:Larva / Q000502:physiology; D008297:Male; D051379:Mice; D009349:Nematode Infections / Q000503:physiopathology*; D009351:Nematospiroides dubius / Q000502:physiology*; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology; D013997:Time Factors; D014253:Trichostrongylosis / Q000503:physiopathology; D014254:Trichostrongylus / Q000502:physiology*