Hong Kong scientists are part of an international team developing better tests for toxins in coral fish with the help of the Pacific island nation of Kiribati.
The City University-led research is using coral fish samples from Kiribati to develop rapid testing methods for ciguatera and paralytic shellfish poisoning toxins.
Ciguatera food poisoning is mainly associated with the consumption of big coral fish, which accumulate the toxin in their bodies through years of eating small fish that consume toxic algae in coral reef seas. It can cause gastrointestinal and neurological symptoms in people several hours after eating the fish.
Paralytic shellfish poisoning toxin is a natural toxin sometimes found in bivalve shellfish.
Kiribati fish produce the highest levels of ciguatera toxin in the Pacific region, said associate professor Michael Lam Hon-wah.
'People in Kiribati have their own method of detecting ciguatera. They cut the fish, take a slice of the liver and wipe it around their lips. If they feel numbness, the fish might be contaminated. The whole catch will be destroyed,' Dr Lam said.
Tests for shellfish poisons existed, but it was still worth developing reference standards and rapid tests for both toxins, chair professor of biology Paul Lam Kwan-sing said.
