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Developmental stages of Haemogregarina delagei in the leech Oxytonostoma typica

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Abstract:

Haemogregarine infections in little skates, Raja erinacea, were assessed for a period of approximately 1 year. Prevalence of Haemogregarina delagei in little skates varied seasonally between 77 and 91%. Prevalence of leeches (Oxytonostoma typica) varied between 9 and 18%. One leech was removed from a little skate (from Passamaquoddy Bay, New Brunswick) heavily infected with H. delagei. Imprints made from the leech's digestive tissue contained haemogregarine oocysts that produced 16–32 sporozoites, and meronts with 4 merozoites. The latter were also found in imprints made from salivary tissues.

Les infections à hémogrégarines ont été évaluées pendant approximativement 1 an chez des Raies Hérissons, Raja erinacea. La prévalence d'Hemogregarina delagei chez des Raies Hérissons variait de 77 à 91 % selon la saison. La prévalence des sangsues (Oxytonostoma typica) a varié de 9 à 18 %. Une sangsue a été prélevée chez une Raie Hérisson (dans la baie de Passamaquoddy, au large du Nouveau-Brunswick) et elle était infestée par H. delagei. Des empreintes de tissu digestif de sangsues contenaient des oocystes d'hémogrégarines qui ont produit de 16 à 32 sporozoïtes, et des mérontes à 4 mérozoïtes. Ces derniers ont également été trouvés dans des empreintes de tissus salivaires.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: 2001-10-01

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  • Published since 1929, this monthly journal reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
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