Summary
Oocyst production of E. mivati and E. tenella in chick embryos was reduced and delayed in embryos incubated at temperatures below 41° C. Sporulation of E. mivati and E. tenella was studied in oocysts recovered from embryos incubated at temperatures between 37–39° C or at temperatures varying between 41° C during the day and 37–39° C at night. Poor sporulation rates were obtained, especially in embryos infected with E. mivati. It is postulated that the formation of the wall of the macrogamont occurs without the presence of microgametes thus giving rise to oocysts which fail to sporulate. Alternatively, the viability of microgametes is affected if they are produced in embryos incubated at below optimum temperatures so that they die shortly after penetration of the macrogamont but are still able to stimulate the formation of the oocyst wall.
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Long, P.L. Observations on the oocyst production and viability of Eimeria mivati and E. tenella in the chorioallantois of chicken embryos incubated at different temperatures. Z. F. Parasitenkunde 39, 27–37 (1972). https://doi.org/10.1007/BF00329218
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DOI: https://doi.org/10.1007/BF00329218