Fatal Caryospora bigenetica (Apicomplexa: Eimeriidae) infections in cotton rats, Sigmodon hispidus

Four groups of cotton rats, Sigmodon hispidus, were shown to be suitable secondary hosts for the viperid coccidium, Caryospora bigenetica, following oral inoculation of a mixture of oocysts and sporocysts. Swelling of the face, ears, and scrota and hemorrhagic ears were the predominant clinical sign...

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Bibliographic Details
Published in:The Journal of parasitology 1988-10, Vol.74 (5), p.838-841
Main Authors: Lindsay, D.S, Sundermann, C.A, Blagburn, B.L, Upton, S.J, Barnard, S.M
Format: Article
Language:English
Subjects:
Animals
Arvicolinae - parasitology
COCCIDIA
Coccidiosis - mortality
Coccidiosis - pathology
Coccidiosis - veterinary
Comas
Connective tissues
Developmental stages
Disease Susceptibility
Eimeria - growth & development
Female
INFECCIONES POR PROTOZOARIOS
Infections
Inoculation
Life Cycles and Development
Male
Mice
Oocysts
Parasite hosts
Parasitology
PEST RESISTANCE
PROTOZOAL INFECTIONS
PROTOZOOSE
RAT
RATA
RATS
RESISTANCE AUX RAVAGEURS
RESISTENCIA A LAS PLAGAS
Sex Factors
Sigmodon hispidus
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Summary:Four groups of cotton rats, Sigmodon hispidus, were shown to be suitable secondary hosts for the viperid coccidium, Caryospora bigenetica, following oral inoculation of a mixture of oocysts and sporocysts. Swelling of the face, ears, and scrota and hemorrhagic ears were the predominant clinical signs and some cotton rats died in 3 of 4 experiments. Developmental stages of C. bigenetica were found in connective tissue components of the ear, nose, cheeks, anal skin, scrotum, and penile sheath of all cotton rats in which these tissues were examined. Additionally, developmental stages of C. bigenetica were found in connective tissue components of the following tissues examined from some cotton rats: tongue, lung, testicle, epididymis, rectum, base of the tail, footpad, and bone marrow. The present study shows that C. bigenetica can be pathogenic for cotton rats and demonstrates many new anatomic sites for developmental stages of this parasite in the secondary host.
ISSN:0022-3395
1937-2345
DOI:10.2307/3282263