Volume 15, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Laboratory and preliminary field studies were conducted to evaluate the role of the guppy () as an active predator on cercariae.

When guppies were introduced into spring water containing about 1,000 cercariae per fish, a dramatic reduction in the number of cercariae was observed. In many experiments no cercariae could be found after 60 minutes. In one laboratory experiment, the infection rate and worm burden of mice exposed to cercariae shed by in the presence of guppies was also greatly reduced.

Groups of mice were exposed to cercariae shed by infected , in nylon-screen cages partially immersed in natural pond water. The conditions of exposure were similar in all experiments, the only difference being the presence or absence of guppies in the cages. In three experiments the mean numbers of worms recovered from mice exposed in cages with infected in the presence of guppies were approximately 2, 4 and 9, whereas in the control cages, with the same number of infected , but without guppies, the mean numbers were 29, 48 and 126.

It was concluded that under special conditions the guppy may play an important role as a limiting factor in the infection of vertebrate hosts with .


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error