Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Trypanoplasma ompoki sp. n. from freshwater fishes in Kerala, India, with observations on its vector-phase development and transmission.

Abstract

T. ompoki sp. nov. from the blood of 8 of 20 Ompok bimaculatus (type host) and 7 of 22 Clarias dussumieri dussumieri in Iritty, Cannanore district, Kerala, India, is described. Hemiclepsis marginata (a freshwater leech found on fallen leaves and occasionally in fish found in a local irrigation canal and the probable natural vector of T. ompoki) was bred in the laboratory and allowed to feed on infected fish. The parasites developed in the crop of the leeches; repeated multiplication of the trypanoplasms produced smaller forms which transformed into metacyclics and these moved into the proboscis sheath and surrounding tissue. Experimental transmission of the flagellates to C. dussumieri was successful but not to Channa punctatus and Heteropneustes fossilis, showing the presence of host specificity to some degree.