Re: [RML] camallanus

Bruce Hansen (bhansen at
Tue, 22 Jul 1997 08:23:38 +1000

G;day meryl

It certainly sounds like Camallanus - and as you have seen from the list
there are a number o drugs that seem to work. The problem is that
information on this parasite is a bit sketchy, especially as far as
up-to-date treatments goes.

The problem also is that the worm is a live bearer and may have a 3 month
maturation time in the host fish before it is obvious.I feel that an
effective initial dose should kill both adults and larvae but evidence for
& against this is lacking. Perhaps a follow-up dose a month or so later
would be worthwhile.

Also the problem of reinfestation needs attention - we don't know if live
foods can be a culprit but your oservation adds more evidence that perhaps
live foods ( e.g. tubifex & wrigglers, and perhaps live bloodworms?) and
the introduction of other fish can be responsible.

bhansen at

> From: Meryl Jury <merylj at>
> To: rainbowfish at
> Subject: Re: [RML] camallanus
> Date: Tuesday, 22 July 1997 7:26
> Hi, can anyone describe the symptoms of this problem!
> (We have had various fish show a worm problem with red worms hanging out
> the anus and the worms have been alive because sometimes they would
> and retreat inside the fish, we have treated the fish with drontal worm
> tablets - meant for cats and the worms have dissappeared but I wonder if
> only killed the adults and left the eggs or larve intact.)
> When I say we treated the fish with drontal - I mean we put drontal
> in the infected tank and removed the charcoal from the filter. After
> days the tablets had dissolved so we started 10 per cent water changes
> the next 10 days and the worms seemed to be cleared up. A few months
> after feeding mosquito larve the problem reoccurred. I wonder if we
> killed the parasite or if they were happily living inside the fish all
> time!
> Hopefully we have now cured this problem in our home tanks but we keep a
> watch out for any re-occurance.
> Meryl