tetrahymena

[Tan Cheong Huat]

Hi,
I am doing experiments with zebrafish fry but these are being killed 
by Tetrahymena very suddenly at around 13days post hatching, 
although they were healthy before that.  The adults from which 
these fry were obtained were uninfected, although some from local 
farms were.

Work is at a most critical stage. Could you please advise on
curative/preventive measures, please?

C H Tan