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===Identification===

==Identification==

Each oocyst measures 20-50μm.  The eggs are subspherical, and the wall is colourless and thin.  When sporulated each one contains two sporocyts each with four sporozoites.

Each oocyst measures 20-50μm.  The eggs are subspherical, and the wall is colourless and thin.  When sporulated each one contains two sporocyts each with four sporozoites.

===Life Cycle===

==Life Cycle==

There are essentially three stages in the ''Isospora'' life cycle.  The first is called '''Sporogony''' and is the asexual stage of the parasite development.  It occurs exogenously, and leads to the development of ''sporozoites'' in the oocysts.  After this occurs, the oocysts are now deemed infective.

There are essentially three stages in the ''Isospora'' life cycle.  The first is called '''Sporogony''' and is the asexual stage of the parasite development.  It occurs exogenously, and leads to the development of ''sporozoites'' in the oocysts.  After this occurs, the oocysts are now deemed infective.