Objective: To analyze the zymogram of peroxidase (PER) and phosphoglucose isomerase (PGI) of three species of Sarcocystis.
Methods: The collected parasites were homogenized and fragmented by ultrasonication. After centrifugation, the supernatants were analyzed by isoelectric focusing electrophoresis.
Results: The isolates of S. cruzi from infected water buffalo and cattle all showed identical enzyme profiles, 7 bands of PER at pH 4.44-6.98 and 6 bands of PGI at pH 4.66-6.53; and same with the isolates of S. hirsuta. 5 bands of PER at pH 4.97-7.15 and 4 bands of PGI at pH 4.70-6.51. The zymograms among S. cruzi, S. hirsuta and S. fusiformis were different considerably.
Conclusion: The data support the hypothesis that both water buffalo and cattle are the natural intermediate hosts of S. cruzi and S. hirsuta at the gene level. S. cruzi, S. hirsuta and S. fusiformis are different species.
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