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Two new eimerians (Apicomplexa) from insectivorous mammals in Madagascar.

Lee Couch¹, Juha Laakkonen, Steven Goodman

¹Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA. lcouch@unm.edu

The Journal of Parasitology

|April 22, 2011

Summary

Two new Eimeria species were discovered in Malagasy insectivorous mammals. This study details their oocyst morphology and prevalence in Afrosoricida and Soricomorpha species.

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Area of Science:

Parasitology
Zoology
Eukaryotic Microbiology

Background:

Insectivorous mammals in Madagascar, particularly Afrosoricida, are hosts to various endoparasites.
Coccidian parasites of the genus Eimeria are known to infect a wide range of vertebrate hosts.
Previous surveys of Eimeria in Malagasy mammals are limited, necessitating further investigation.

Purpose of the Study:

To identify and describe new species of Eimeria infecting insectivorous mammals in Madagascar.
To document the prevalence of Eimeria infections in sampled Afrosoricida and Soricomorpha.
To characterize the oocyst morphology of the newly discovered Eimeria species.

Main Methods:

Fecal samples were collected from 126 insectivorous mammals in Madagascar between 1999 and 2001.
Samples were examined for the presence of eimeriid oocysts.
Oocyst morphology was analyzed using light microscopy, and measurements were taken for species description.

Main Results:

Two morphotypes of eimeriid oocysts, representing two presumptive new species, were identified in 47% of infected animals.
Eimeria tenrececaudata n. sp. oocysts are subspheroidal (18.8 × 17.4 µm) with specific sporocyst features.
Eimeria setifersetosa n. sp. oocysts are spheroidal to subspheroidal (30.1 × 28.6 µm) with distinct sporocyst characteristics.

Conclusions:

Two novel Eimeria species, Eimeria tenrececaudata and Eimeria setifersetosa, are described from Malagasy insectivorous mammals.
The study expands the known diversity of Eimeria parasites in this unique fauna.
Further research is needed to understand the host-parasite relationships and ecological impact of these new species.