Growth and fecundity of Oesophagostomum dentatum in high-level infections and after transplantation into naive pigs.
This experiment was designed to examine the growth, proportion of stages, and fecundity of an Oesophagostomum dentatum population by transplantation of a known small number of worms from a high-density population into helminth-naive recipient pigs. Approximately 1,500 4-week-old worms [69% fourth-stage larvae (L4), 31% adult worms] were transplanted into each of 5 recipient pigs (group B), and these pigs, along with a group of 5 high-level-infection control pigs (group C), were killed at 4 weeks after transplantation to determine and compare the worm burdens. By 2 weeks after transplantation and throughout the experiment, fecal egg counts of group B exceeded those of group C and the fecundity of the worms was higher, though not statistically significantly so, in the transplanted worms. In the recipient pigs, all worms (approx. 70% establishment) had developed to the adult stage and were significantly longer than worms recovered from the group C pigs.
Christensen
C M
CM
Danish Center for Experimental Parasitology, Royal Veterinary and Agricultural University, Frederiksberg, Denmark. Charlotte.M.Christensen@vetmi.kvl.dk
Barnes
E H
EH
Nansen
P
P
Grøndahl-Nielsen
C
C
D000818:Animals; D005243:Feces / Q000469:parasitology; D005260:Female; D005298:Fertility; D008297:Male; D009814:Oesophagostomiasis / Q000503:physiopathology / Q000662:veterinary*; D009815:Oesophagostomum / Q000254:growth & development / Q000302:isolation & purification / Q000502:physiology*; D010270:Parasite Egg Count; D013552:Swine; D013553:Swine Diseases