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At least 19 recordsLinked to original sources
PubMed1988

Capillaria procyonis (Nematoda: Trichuroidea) eggs from the tongue of the raccoon (Procyon lotor).

During an investigation to determine the prevalence and intensity of larvae of Trichinella spiralis in raccoons (Procyon lotor), unembryonated capillariid-type eggs were found routinely in the sediment resulting from 1% pepsin-HCl acid digests of the tongue. The sediment from 36 (90%) of the 40 tongue digests examined contained these capillariid-type eggs. Mean measurements of egg width and length were 25 +/- 2 microns and 62 +/- 2 microns, respectively. In addition, the surface of the egg shell had a pitted appearance. Adult parasites were not found in any of the tongue digests. The egg measurements and surface topography agree with what has been described previously and are tentatively identified as Capillaria procyonis. The detection of C. procyonis eggs in the present report indicates that this parasite inhabits the epithelial lining of the raccoon tongue, in addition to the esophagus, and that eggs expelled by females are deposited in the tracts these parasites create as they migrate.

Animals↗
PubMed1989

New information on the location of Capillaria procyonis (Nematoda: Trichuroidea) in the tongue of a raccoon (Procyon lotor).

Histologic examination of the tongue of one juvenile male raccoon demonstrated the presence of adults and unembryonated eggs of the nematode Capillaria procyonis within parasite-induced tunnels in the stratified squamous epithelium. There was no inflammatory infiltrate within the epithelium or the subjacent lamina propria. The shape of tunnels approximated that of the resident nematodes and were lined by flattened and attenuated epithelial cells. Therefore, the site of infection of C. procyonis in the raccoon includes the oral, lingual and pharyngeal epithelium in addition to the esophagus.

Animals↗
PubMed1981

The early phase of tissue invasion by Trichuris muris (nematoda: Trichuroidea).

Eggs of Trichuris muris hatched when implanted directly into the ceca of mice. The hatched larvae had penetrated the epithelium 40 min after introduction of the eggs. It is certain that the larvae penetrated the epithelium lining the cecal glands after entering the glands. Since penetration through the surface or luminal epithelium was not observed, it may be that the larvae enter gland openings selectively before penetrating epithelial cells.

Animals↗
PubMed1976

[Capillaria hepatica infection of Mastomys natalensis: on the development, egg production and host reaction (author's transl)].

Studies on the development and egg production of Capillaria hepatica and on the macroscopically visible alterations of the liver and spleen of the host were carried out in experimentally infected Mastomys natalensis. Following the oral administration of infective eggs the first stage larvae hatched in the caecum of fasting and fed animals after about 8 and 15 hours respectively. The prepatency could be found with 20 days. The dynamics and duration of egg production of the parasite proved to be dependent on the infective dose. After the first week of patency increasing numbers of eggs/liver were found with increasing doses of infection up to 800 eggs per animal. This relation could not be observed 76 days post infection. After infections with 50, 300 und 800 eggs per animal maximum egg production was found between 60 and 72, 36 and 48 and about 30 days p.i., respectively. The egg production of the parasites correspondently continued for more than 85 days after infection or had ceased 72 or 48 days p.i. Intraperitoneal administration of infective eggs revealed a lower infection rate, evaluated by the number of eggs per liver, than oral infection.

Age Factors↗
PubMed1980

[Immunization against Capillaria hepatica: the effects of primary infections, x-irradiated stages, non-embryonated eggs, and soluble egg extracts (author's transl)].

The influence of primary infections with embryonated infective eggs or with X-irradiated infective eggs, and of non-embryonated eggs, and egg homogenate extracts on challenge infections with Capillaria hepatica was investigated. The worm reproductivity was significantly suppressed in a sublethal challenge infection given 11 days after a primary infection of Mastomys natalensis with 50, 150, 400, and 800 eggs per animal. The administration of 600 X-irradiated (2.2 Krd) embryonated eggs 36 days before challenge as well as an intraperitoneal injection of non-embryonated eggs 12, 10, 8, 6, 4, and 2 days before challenge (simulating the egg production of a normal infection) also reduced significantly the egg production of a weak (50 eggs/ animal) infection. No effect was observed on a moderate challenge (300 eggs/animal). The effect was not markedly enhanced by the repeated administration of X-irradiated eggs or by the combination of X-irradiated infective eggs and non-embryonated eggs. Immunization of mice with soluble egg extracts resulted in significant reduction of egg production determined 60 days after challenge. Two hundred and thirty eggs of C. hepatica/g body weight proved to be a lethal infection dose for M. natalensis. The animals died between 20 and 35 days after infection. After single infections with 50, 150, 400, or 800 eggs per animal the mortality of Mastomys challenged 36 or 52 days later was reduced to 0--30%. Using X-irradiated embryonated eggs for immunization only repeated administration led to protection in 70 to 80% of the animals. About 40% of the animals could be protected by the intraperitoneal injection of non-embryonated eggs. If death occurred it was delayed. The combination of X-irradiated stages and eggs did not enhance the protection.

Animals↗
PubMed1995

Prevention of clinical trichostrongylidosis in calves by strategic feeding with the predacious fungus Duddingtonia flagrans.

The present investigation showed that strategic feeding of first-season calves with the microfungus Duddingtonia flagrans through the initial 3 months of the grazing season could prevent severe clinical trichostrongylidosis in the late summer. The successful prevention of disease was particularly noteworthy in view of the high stocking rate practiced on this permanent pasture, which was widely contaminated with a range of gastrointestinal nematodes. The results showed that larval populations of Ostertagia and Cooperia were significantly reduced on the pasture grazed by the fungus-treated calves. Numbers of Nematodirus seemed less affected. The present paper discusses the complexity of fungus-nematode interactions in dung pats under natural conditions.

Animals↗