A man is experiencing severe illness on consuming shell fishes.It has been noticed that marine shell fish in the sea feeds on dinoflagellates.What would be most expected reason for the illness in man?
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Answer:
Marine or saltwater harmful algal bloom (HAB) toxins can cause a variety of illnesses in humans and animals. Exposure to marine HAB toxins can occur through direct contact by swimming, breathing in aerosolized toxins (toxins in water turned into tiny airborne droplets or mist), or eating toxin-contaminated shellfish or finfish 1. In marine mammals, fish, and other aquatic marine life, exposure to HAB toxins can cause widespread illness or death. However, most states at risk for marine HABs have excellent monitoring programs in place to close harvesting when toxins are present in shellfish 2. Birds can also get sick by eating algae, drinking contaminated water, or eating contaminated marine fish or shellfish 3. For example, pelicans and cormorants have been poisoned by exposure to these toxins, and, in some cases, thousands of birds have died 4.
Marine HABs have occurred in the Gulf of Mexico, and along the Atlantic and Pacific coasts of the United States. Two major groups of marine phytoplankton, diatoms and dinoflagellates, produce HAB toxins. Some common marine HAB toxins include brevetoxins, azaspiracid, ciguatoxins, domoic acid, okadic acid, saxitoxin, and dinophysistoxins