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Pathogenicity of Eimeria mulardi Chauve et al., 1994 in experimentally infected mule-ducks. Precision on pathological stages The pathogenicity of Eimeria mulardi has been studied in mule-ducklings orally inoculated with sporulated oocysts. With two dose levels (10(5) or 10(6) oocysts per bird), a significant loss of body-weight was observed, whereas no loss of weight was observed with a dose level of 10(4). With a dose of 10(6) oocysts per bird, inflammatory and haemorrhagic changes associated with obstruction mainly involving the end of the jejunum, the ileum and the caeca were seen from day 5 post-inoculation. Pathogenicity of Eimeria mulardi is due to the last generation of meronts and essentially to gamonts.

A new species of coccidium. Eimeria mulardi n. sp., has been described from the mule duck. The endogenous cycle is studied in experimentally infected ducks. A least two generations of meronts were observed, mainly in the lamina propria of jejunum and ileum and the gametogony occurred principally in glandular cells of the intestinal tract, except in duodenum. All the endogenous stages were localized in the nucleus of the cell.

Coccidia of mule ducks: preliminary survey in three farms of the south-west region of France A coprological survey carried out on mule duck farms, has revealed seven different coccidian species: Cryptosporidium (1), Tyzzeria (2) and Eimeria (4). Tyzzeria was the most frequent. The four Eimeria species have never been previously noted in France and one of them could be a new species.