Freshwater snails are known to serve as first intermediate hosts for various parasitic diseases such as schistosomosis, amphistomosis and fasciolosis. Two freshwater snail species, <em>Lymnaea natalensis</em>, Krauss 1848 and <em>Bulinus tropicus</em>, Krauss 1848 were sampled from five localities in Gauteng and one locality in the North West Province from 2007 to 2010. These snails were collected in order to study their cercarial sheddings. They were found to be infected with three different types of strigea cercariae, of which the morphology was studied using standard light and scanning electron microscopy techniques.

A total of thirty snakehead fishes Channa micropeltes (Cuvier, 1831)&#xD;were collected at Tasik Kenyir, Malaysia. Muscle, liver, intestine and kidney tissues were removed from each fish and the intestine was opened to reveal cestodes. The cestodes were identified on the basis&#xD;of their morphological characteristics. After staining, drawing by using Camera Lucida, measurement by using advanced microscope and using Scanning Electron Microscope (SEM), the results showed that&#xD;the cestode was Senga parva (Fernando and Fertado, 1964). It differed from other species of genus Senga, parasitising fish genus Channa, by the size of the strobila, scolex, apical disc, hooks, number of hooks, testes and some other characteristics.