Literaturdatenbank
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Marata, A., Zengarini, M., Piccinini, A., & Rossi, G. M. G. , An outbreak of fatal intranuclear coccidiosis in tortoises. Unpublished paper presented at 1. International Conference on Avian, Herpetological & Exotic Mammal Medicine.
Added by: Admin (06 Jan 2014 18:24:56 UTC) |
| Resource type: Conference Paper BibTeX citation key: Marata2013 View all bibliographic details  |
Categories: General Keywords: Astrochelys radiata, Einzeller - protozoa, Schildkröten - turtles + tortoises, Stigmochelys pardalis, Testudinidae, Veterinärmedizin - veterinary medicine Creators: Marata, Piccinini, Rossi, Zengarini Collection: 1. International Conference on Avian, Herpetological & Exotic Mammal Medicine |
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| Abstract |
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Testudinidae Chelonian intranuclear coccidiosis (IC) is an uncommon pathological finding, and few descriptions are reported in literature.1,2 We describe an outbreak that occurred in three animals, two radiated tortoises (Geochelone radiata), and one leopard tortoises (Geochelone pardalis), recently imported to Italy from France. Turtles were examined because of anorexia and lethargy, and haematological and plasma biochemical evaluations indicated a mild to severe anaemia, elevated white blood cell counts, and alterations in biochemical profiles. All three animals died and histological examination revealed a generalized infection. Intranuclear protozoans, were observed by light microscopic examination in different organs, mainly renal and hepatic epithelial cells, and electron microscopy confirmed different developmental stages of an intranuclear coccidian parasite. Livers of all three affected turtles showed intranuclear coccidia in the bile duct epithelium, hepatocytes, and melanomacrophages in which intracytoplasmic meronts or merozoites were also seen occasionally. Parasitism was accompanied by small foci of hepatocellular necrosis and several infiltrates of mononuclear cells and scattered heterophils. Renal localization was characterized by coccidia detected in the nuclei of cortical and medullary tubules, and intracytoplasmic meronts and merozoites occasionally detected in tubular epithelium. Parasitism was associated with renal tubular necrosis and interstitial mononuclear infiltration. TEM examination revealed spherical meronts with a central residual body surrounded by some merozoites in nuclei of infected cells. Some nuclei showed one or two gametes. Lesions associated with IC are apparently rare, with only two reports of fatal infection in Geochelone.1,2 This is the third description of an IC in tortoises, and the first outbreak described in Italy.
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