Response of Immunized and Nonimmunized Calves to Cecal Inoculation of First-Generation Merozoites of Eimeria bovis

Hammond, Datus M.; Andersen, Ferron L.; Miner, Merthyr L.

doi:10.2307/3276269

Cited by 6 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, although some resistance was found to be associated with the development of gametogony stages, it was very slight compared with that associated with asexual stages, in particular the second generation schizont. First generation schizogony was not essential for the induction of immunity, shown by results obtained with 62 h transfers, and this has also been noted for infections with E. bovis in calves (Hammond, Andersen & Miner, 1964).…”

Section: Stages Of E Maxima Which Induce the Immune Responsementioning

confidence: 63%

Immunity to coccidiosis: stages of the life-cycle ofEimeria maximawhich induce, and are affected by, the response of the host

Rose

Hesketh

1976

Parasitology

View full text Add to dashboard Cite

SummaryAn attempt was made to determine the relative importance of the different life-cycle stages ofEimeria maximain the induction of immunity and also those stages most affected by the immune response of the host. In one experiment the life-cycle was controlled by chemotherapy but in all other experiments partial life-cycles were induced by transfers of infected mucosa between hosts.The results indicated that the second generation schizont stage is probably that most concerned in the induction of protective immunity and that sexual stages are most susceptible to immune inhibition. After initial inhibition in the immune host the earlier asexual stages were able to resume development when transferred to a susceptible host. The longer the period of exposure to the immune environment, the less able was the parasite to recover.

show abstract

Section: Stages Of E Maxima Which Induce the Immune Responsementioning

confidence: 63%

Immunity to coccidiosis: stages of the life-cycle ofEimeria maximawhich induce, and are affected by, the response of the host

Rose

Hesketh

1976

Parasitology

View full text Add to dashboard Cite

show abstract

Clinical and histologic observations of actively induced resistance toEimeria ferrisi levine and ivens, 1965 (Protozoa: Eimeriidae) in the mouse (Mus musculus)

1979

View full text Add to dashboard Cite

Actively induced resistance to Eimeria ferrisi was studied clinically and histologically in Mus musculus. Results indicated that a partial resistance to challenge was obtained. Initially infected animals had severe symptoms of coccidiosis but the symptoms diminished as the infections progressed. Previously infected mice had only slight symptoms of infection when challenged. Challenge doses produced severe coccidiosis in the non-immune controls although none died. Six mice died at peak patency during the immunizing inoculations. Histologic examination indicated that parasite numbers were reduced in resistant animals. The reduction appeared greatest during late sexual development. Tissues from resistant animals showed little evidence of damage and appeared to contain an increased amount of lymphoid tissue. Tissues from non-immunized mice killed after challenge were heavily infected and contained extruded blood, mucous, and cellular debris in the gut lumen. Considerable destruction of host epithelial cells occurred. The observations are discussed and compared to other coccidial immunity studies.

show abstract

Bovine transfer factor: Effect on bovine and rabbit coccidiosis

Klesius

Kristensen

1977

Clinical Immunology and Immunopathology

View full text Add to dashboard Cite

Response of Immunized and Nonimmunized Calves to Cecal Inoculation of First-Generation Merozoites of Eimeria bovis

Cited by 6 publications

References 8 publications

Immunity to coccidiosis: stages of the life-cycle ofEimeria maximawhich induce, and are affected by, the response of the host

Immunity to coccidiosis: stages of the life-cycle ofEimeria maximawhich induce, and are affected by, the response of the host

Clinical and histologic observations of actively induced resistance toEimeria ferrisi levine and ivens, 1965 (Protozoa: Eimeriidae) in the mouse (Mus musculus)

Bovine transfer factor: Effect on bovine and rabbit coccidiosis

Contact Info

Product

Resources

About