Comparison of stain reactions in different cyclical stages of haemoproteids and haemogregarines

Cytochemical studies showed that haemoproteids, represented by Haemoproteus columbae and Parahaemoproteus danilewskii, differ in their reactivity for Feulgen, Unna Pappenheim stains and glycogen from haemogregarines, represented by Haemogregarina boueti and Haemogregarina aegyptia. On the other hand, there was no difference in the cytochemical make-up of gametocytes between H. columbae and P. danilewskii. In its stain reactions, Haemoproteus appeared to behave in a manner similar to that of Plasmodium; they both exhibited fluctuations in DNA and RNA in different cyclical stages. All stages of the parasites studied were negative for lipids, but all showed a positive reaction for proteins.