title: The oocyst sporulation time of Eimeria species from the fowl.
abstract: Freshly isolated oocysts were sporulated at 29 degrees C with constant aeration. Minimum sporulation time was determined by dosing the developing oocysts at intervals of 1 h to successive groups of chickens to assess the first occurrence of infective forms. Microscopic analysis of the sporulating oocysts allowed calculation of the time required for 50% of the oocysts to complete the process. This was considered to be the most accurate determination and the most useful for comparative purposes. For 7 species of coccidia in the fowl, the 50% sporulation times were as follows: Eimeria acervulina 11.4 h; E. brunetti 38.3 h; E. maxima 38.1 h; E. mivati 19.0 h; E. necatrix 19.7 h; E. praecox 24.8 h; E. tenella 21.2 h.
mesh_terms: D000818:Animals; D002645:Chickens / Q000469:parasitology*; D004539:Eimeria / Q000502:physiology*; D013045:Species Specificity; D013170:Spores / Q000502:physiology; D013997:Time Factors