Abstract
Hydatid cyst scolexes of lung and liver from sheep and water buffalo were electrophoreticaily examined for phosphoglucose isomerase (PGI), phosphoglucose mutase (PGM) and tetrazolium oxidase (Te) activity. One each of phosphoglucose isomerase, phosphoglucose mutase and tetrazolium oxidase activities were found in all of the hydatid cysts studied. PGI and PM in ail hydatid cysts studied appeared te be controlled by two codominant alleles. PGI and PGM proved to be a good taxonomic criterion to differentiate the hydatid cysts of the water buffalo from those from sheep. On the other hand, TO failed to differentiate between the sheep and water buffalo hydatid cysts. The hydatid cysts that parasitise the sheep's organs can be considered as arising from a different strain from the cysts that parasitise the water buffalo organs, while lung and liver hydatid cysts of the sheep appeared to be a similar strain.
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