I sometimes think that if you Americans didn't have anything to worry about you'd worry yourself to death worrying about not having anything to worry about.
Anywho CD, you don't need no expensive test kits....
"In Northern
Australia, where ciguatera is a common problem, two different methods are widely believed to be available for determining that fish harbors significant levels of ciguatoxin. The first method is that if a piece of fish is contaminated with the toxin,
flies will not land on it. The second is that the toxin can be detected by feeding a piece of fish to a
cat, as cats are allegedly highly sensitive to ciguatoxin and will display symptoms. There is a third, less common method for ciguatera testing that involves putting a silver coin under the scales of the suspect fish. If the coin turns black, reportedly, the fish is contaminated; but if it does not turn black then it should be safe. It is not known whether any of these tests produce results that are actually accurate."
but if all else fails......
"There are a number of antiquated Caribbean
naturopathic and ritualistic treatments, most of which originated in
Cuba and nearby islands. The most common old-time remedy involves bed rest subsequent to a
Guanabana juice
enema. Other folk treatments range from directly porting and bleeding the gastrointestinal tract to "cleansing" the diseased with a dove during a
Santeria ritual. The efficacy of these treatments has never been studied or substantiated; nevertheless they are purportedly still used to this day."
(both quotes from Wikipedia)