ISSN:
1432-1955
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Description / Table of Contents:
Résumé Les examens coprologiques systématiques effectués surQuelea quelea et d'autres espèces de Ploceidae du Tehad maintenus en captivité ou trouvés dans la nature ont permis l'identification d'une coccidie du genreIsospora différente de celles du même genre déjà décrites. Elle est nomméeIsospora xerophila du fait de sa grande résistance à la dessication et à la chaleur. Une description des caractères morphologiques, du cycle interne et des conditions de sporulation est proposée ainsi qu'une étude clinique et épizootiologique de la maladie.
Notes:
Summary The authors describe a coccidia belonging to the genusIsospora, which they found onQuelea quelea and other birds of the Ploceidae family in Chad. Its shape is spherical or subspherical; the mean size of the ookyst is 21,4 on 19,5 μm. It contains 2 sporocytes, each having 4 sporozoïtes with two large vacuoles. The sporulation occurs in 24 hrs at 28° C in water, even if the material has been dessicated and exposed to sun heat for 2 1/2 hrs per day during 8 days at 40–45° C. This coccidia is different from those described before, and, considering their adaptation to dryness, the authors call itIsospora xerophila. The internal cycle takes place in the 1/3 posterior and 1/3 medium of the intestine and the production of ookystes starts 7 days after infection. The ookysts are mainly liberated during the night. The birds contract the parasite in crowded and durty cages or in nature during the nesting period when conditions are still good for sporulation of the ookysts. Then, young birds not immunized and weakened adults can be infected. In cages, Amprolium gives good results in the treatment of the disease.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02433466
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