Causes moderate to severe illness with fever, diarrhea containing blood or mucus or both, and the constant urge to have bowel movements. It is transmitted in water polluted with human wastes. Causes severe illness affecting the nervous system. Symptoms start as blurred vision. The person then has problems talking and overall weakness.
Symptoms then progress to breathing difficulty and inability to move arms or legs.
Infants and young children are particularly at risk. It is transmitted in foods such as home-packed canned goods, honey, sausages, and seafood. It strikes mostly in the warmer months of the year and is transmitted by infected, undercooked, or raw seafood. Parasites rarely cause food poisoning. When they do, they are usually swallowed in contaminated or untreated water and cause long-lasting but mild symptoms.