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Diseases of Aquatic Organisms

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DAO 58:79-82 (2004)  -  doi:10.3354/dao058079

Microsporidians in penaeid shrimp along the west coast of Madagascar

M. Toubiana1, O. Guelorget2, J. L. Bouchereau3, H. Lucien-Brun4, A. Marques1,*

1Défense et Résistance chez les Invertébrés Marins (DRIM), UMR 5098, cc 80, Université Montpellier II Place E. Bataillon, 34095 Montpellier Cedex 05, France
2Laboratoire Hydrobiologie Marine, UMR 5556, cc93, Université Montpellier II, 34095 Montpellier Cedex 05, France
3Laboratoire de biologie Marine Univ. Antilles Guyane BP 592, 97159 Pointe-à-Pitre Cedex, Guadeloupe
4SEPIA, 13 avenue de la Gare, 78181 St Quentin Yvelines Cedex, France
*Corresponding author. Email:

ABSTRACT: Three species of penaeid shrimp, Fenneropenaeus indicus, Penaeus monodon and P. semisulcatus, found in trawler catches off the west coast of Madagascar were infected with microsporidian parasites. The infections were evident as muscular lesions with a cottony appearance when abundant. Spore size (2.6 × 1.6 µm) and morphology (ovoid) for the parasites infecting both F. indicus and P. semisulcatus were not significantly different, suggesting that they might be the same microsporidian species. Spore size (1.4 × 1.1 µm) and morphology (sub-globose to ovoid) in P. monodon infections were significantly different from those in the other 2 shrimp species, suggesting that it was a different parasite. The presence of microsporidians in this biogeographical zone means that there is a potential risk of infections of cultured shrimp in farms situated in the vicinity. This must be assessed by increasing current knowledge of the parasites.

KEY WORDS: Microsporidians · Penaeid · Fenneropenaeus indicus · Penaeus monodon · Penaeus semisulcatus · Madagascar

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