http://www.smh.com.au/news/World/China-blocks-tainted-Aussie-seafood/2007/05/30/1180205342799.html

China has turned away 30 tonnes of frozen seafood from Australia that was tainted with heavy metals, state television reported, as the quality and safety of China's own products have come under scrutiny around the world.

The prawns and squid arrived in Zhanjiang port, southern Guangdong province, where customs officials found lead and cadmium exceeded safety levels, the report said.

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Quarantine finds antibiotics in seafood

http://www.smh.com.au/news/National/Quarantine-finds-antibiotics-in-seafood/2007/08/03/1185648098613.html

Australia's quarantine watchdog has asked for expert medical advice about any health risk associated with antibiotics found in almost a third of imported Asian seafoods.

The move follows the discovery of low levels of antibiotics in a third of samples of prawns, fish, crabs and eels from China, Indonesia, Vietnam and Thailand.

Australian Quarantine Inspection service spokesman Carson Creagh said of the 100 samples, 31 tested positive for anti-microbials, including sulfonamide, tetracycline and penicillin.

New generation antibiotics fluoroquinolone and quinolone also were found.

Antibiotics can be used in seafood production but all traces should be gone by the time they are harvested for market.