Study shows effects of KHV vaccine

Subject: Study shows effects of KHV vaccine Mon Jun 30, 2008 1:28 pm

"The vaccine is also unlikely to confer protection on the fish longer than six months, making it inadequate long term protection."

See full article here - http://www.practicalfishkeeping.co.uk/pfk/pages/item.php?news=1728
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Joined : 02 Apr 2008 Posts : 59

Hi,
Viruses are a problem for life on this planet. Scientists cannot agree if viruses are actually alive or not.

We are familiar with HIV/AIDS and flu viruses as examples. We also know there is no known cure for any virus.

A vaccine for a particular strain of flu may be developed this year but next year it mutates and we all get flu again.

I had a long chat to Ray Jordan from the USA at the national Koi Show this year. It was interesting to hear the views being expressed on KHV in America where a great deal is been spent on KHV research.

For example: Some weird infections where it was not expected. During other tests they could not figure out where the infection was coming from. Some researchers suspect there may be an intermediate host to the KHV - perhaps in the sludge or snails or some other organism.

However, inview of the above posting - a question - how do they vaccinate koi?

Perhaps an importer or someone with experience can tell us.

Regards,
Chris

Subject: Re: Study shows effects of KHV vaccine Tue Jul 01, 2008 10:45 am

I believe to vaccinate koi is dangerous, especially in view of the fact that there are so many unknown factors involved.

Previously, the Israelis (only country who vaccinate their koi as far as I know) injected the koi with a weakened khv virus and then put the fish through a heating program which makes that specific koi immune. The problem is, that fish will still be a carrier and I believe it might infect other koi and spread the virus worldwide.

This procedure caused a lot of criticism. They now allege that they do not use this procedure anymore, but it is not very clear which procedure they do follow. Is that not a cause for concern?

The other problem with vaccines in my view is that no vaccine will last for ever. It have to be re-administered, and can you really allow the import of the vaccine into our country and allow hobbyist to re-administer the vaccine from time to time? The vaccine contains the virus, and that would be playing with fire.

As Chris said, the virus is not stable and change all the time and mutates. Sooner or later the virus might affect other species also, and just think about the disastrous effect that it might have on our natural rivers and dams.

I just think that a vaccine is not the way to go, and I will never import vaccinated koi from Israel, or actually any koi from Israel.
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Paul Viljoen
E Mail: koi@absamail.co.za ; http://www.koionline.co.za

Joined : 02 Apr 2008 Posts : 59

Question: if you are export thousands and thousands of koi how do you inject each one with the required dose of vaccine?

Subject: Re: Study shows effects of KHV vaccine Tue Jul 01, 2008 1:24 pm

I dont know to much about all these biological \ medical stuff but i assume that they are exposing the fish to some version of KHV which allows the fish develop anti-bodies...some die , some will live and then they either sell or breed with the once that has developed a resistance.
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Joined : 30 Jul 2007 Posts : 20 Location : Cape Town

I see koi from Israel from time to time at dealers in and around Cape Town. Can't see why people want to buy them - they are crap, according to me. Evil or Very Mad

Subject: Re: Study shows effects of KHV vaccine Tue Jul 08, 2008 4:04 pm

Maybe the koi needs to be Kosher.
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Joined : 05 May 2008 Posts : 33

A guy I know bought one of these koi a showa, to be exact, with a very nice patern around 4 to 5 years ago.... the only problem is the koi has still not reached 20cm in length Shocked