Summary
Actively induced resistance toEimeria ferrisi was studied clinically and histologically inMus 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.
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Blagburn, B.L., Chobotar, B. & Smith, R.T. Clinical and histologic observations of actively induced resistance toEimeria ferrisi levine and ivens, 1965 (Protozoa: Eimeriidae) in the mouse (Mus musculus). Z. Parasitenkd. 59, 1–14 (1979). https://doi.org/10.1007/BF00927840
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DOI: https://doi.org/10.1007/BF00927840