Developmental stages of Haemogregarina delagei in the leech Oxytonostoma typica

نویسندگان

  • Mark E. Siddall
  • Sherwin S. Desser
چکیده

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. Résumé : 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] 1900

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تاریخ انتشار 2001