These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: [Kinetics of the population of worms in various developmental stages, Haemonchus contortus in sheep after a single experimental infection] experimental infection].
    Author: Dakkak A, Dorchies P.
    Journal: Ann Rech Vet; 1984; 15(4):475-82. PubMed ID: 6529116.
    Abstract:
    This work was performed to study, in 147 month-old male lambs experimentally infected with 14000 Haemonchus contortus infective larvae and slaughtered at 6, 12, 18 and 24h and at 2, 6, 8, 11, 15 and 39 days post-infection (pi): 1, the importance, localisation and nature (with or without sheath) of the worms during the first 24 h pi; 2, the kinetics of the total worm population and of each evolutionary stages from the first to the 39th day pi: 3, the period of emergence of the fourth-stage larvae from the mucosae; 4, the topographic distribution of the different evolutionary stages of the parasite in the abomasum. During the first 24 h pi, the total worm population and that of the intramucosal larvae increase in lineary function to time (r = 0.98). After a maximum value, reached between 24 and 48 h pi, the total worm population decreases in lineary function to time (r = -0.94). Only 52% approximately of the larvae administered develop. One of the reasons is the fact that a proportion of 3rd stage larvae cannot leave their sheath during the rumino-omasal transit. Other limiting factors are discussed. The fourth-stage larvae appear in the mucosae 24 h pi. Their emergence from the mucosae starts between day 1 and 2 pi and increases in intensity from days 2 to 6 pi. The immature adults and the adults are encountered from days 6 and 14 pi respectively, and the prepatent period is on average 16 days.(ABSTRACT TRUNCATED AT 250 WORDS)
    [Abstract] [Full Text] [Related] [New Search]