Experimental Oesophagostomum dentatum infection in the pig: Worm populations resulting from single infections with three doses of larvae

Çhristensen, C. M.; Barnes, Elizabeth H; Nansen, P.; Roepstorff, Allan; Slotved, Hans Christian

doi:10.1016/0020-7519(95)00085-2

Cited by 69 publications

(36 citation statements)

References 17 publications

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“…This is in accordance with the findings of Permin et al (1997a, b) that chickens fed different doses of embryonated A. galli eggs harboured equal worm burdens 8 week later. Christensen et al (1995) found that pigs infected once with varying doses of Oesophagostomum dentatum resulted in equal worm burdens on day 11 post infection, whereas Roepstorff et al (1996) found that pigs trickle infected with O. dentatum showed an increase in the mean worm burdens with the dose rate. Waller et al (1987) did not observe significant differences in worm burdens in lambs kept under low stocking rates compared to high stocking rates.…”

Section: Discussionmentioning

confidence: 96%

Studies onAscaridia galliin chickens kept at different stocking rates

et al. 1998

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The development of Ascaridia galli infections was investigated over a period of 378 days in parasite naïve chicken flocks ('permanent flocks') kept at different stocking rates and infected by introducing previously infected chickens (seeder birds). The results of this study indicated that differences in stocking rate may lead to different levels of establishment of A. galli infections in chickens. Furthermore, significantly higher weight gains were seen in the medium stocking rate (MSR) group than in either the low stocking rate (LSR) or the high stocking rate (HSR) groups. Periodically, the egg excretion was significantly different between the groups. Although not significant for the whole period, the general trend was that the egg excretion was lower in the MSR group than the LSR and HSR groups. The mean worm burdens in the permanent flocks at the end of the experiment were not significantly different from each other. To estimate the availability of infective eggs in the houses and pens, tracer animals were introduced into each of the permanent flocks every month. Information derived from tracer animals did not confirm an effect of stocking rate on the availability of infective eggs in the environment, although there was a trend towards higher mean worm burdens in the tracers from the MSR group.

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Section: Discussionmentioning

confidence: 96%

Studies onAscaridia galliin chickens kept at different stocking rates

et al. 1998

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“…Oesophagostomum infects hosts as sheathed larvae that are ingested with food and that establish inflammatory nodules in intestinal walls. Depending on species and host, adult worms may start to produce eggs between two to four weeks after infection (pigs: Christensen et al, 1995;chimpanzees: Huffman and Caton, 2001). Infection with this taxon in humans can have considerable health effects (Polderman et al, 2010), including weight loss, diarrhea, anemia and intense abdominal pain.…”

Section: Helminth Life Histories and Potential Health Effectsmentioning

confidence: 99%

Social status and helminth infections in female forest guenons (Cercopithecus mitis)

Foerster

Kithome

Cords

et al. 2015

American J Phys Anthropol

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“…In a recent study it was demonstrated that following a single inoculation with 200,000 infective Oesophagostomum dentatum third-stage larvae (L 3 ), adult worms were stunted in their growth and female worms displayed significantly reduced fecundity as compared with worms derived from smaller inoculations (2,000 L 3 ; Christensen et al 1995). However, it could not be shown whether this stunting was due to host-related phenomena, parasite-related phenomena, or both.…”

Section: Introductionmentioning

confidence: 94%

Growth and fecundity of Oesophagostomum dentatum in high-level infections and after transplantation into naive pigs

Çhristensen¹,

Barnes²,

Nansen³

et al. 1996

Parasitology Research

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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.

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Experimental Oesophagostomum dentatum infection in the pig: Worm populations resulting from single infections with three doses of larvae

Cited by 69 publications

References 17 publications

Studies onAscaridia galliin chickens kept at different stocking rates

Studies onAscaridia galliin chickens kept at different stocking rates

Social status and helminth infections in female forest guenons (Cercopithecus mitis)

Growth and fecundity of Oesophagostomum dentatum in high-level infections and after transplantation into naive pigs

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