THE LIFE-CYCLE OF EIMERIA-DANAILOVI FROM DUCKS

The life cycle of Eimeria danailovi Grafner, Graubmann et Betke in exp erimentally infected ducks was studied by optical microscopy. The asex ual generation developed in the posterior part of jejunum and in the w hole ileum. The sexual stages occurred in jejunum and ileum, and, in a ddition, in cecum and colon. All endogenous stages were localized in t he cytoplasm of epithelial cells in the apical and basal parts of vill i. Two generations of meronts were found to develop, differing from on e another in the number of merozoites. The meronts of the first genera tion were observed 2 days post infection (DPI) and contained 10-14 (on the average 11) merozoites. The second generation of meronts, contain ing 12-22 (on the average 16) merozoites, developed on 3 DPI. The sexu al stages were found in histological preparations on 5 and 6 DPI. They appeared in the faeces of experimentally infected ducks first on 5 DP I and they were shed for three days. Oocyst sporulation at room temper ature lasted 2-3 days.