 However, their presence is restricted around the spring and summer[4], but in higher concentrations in December.DSP is a particular kind food poisoning that causes severe gastrointestinal illness in humans and this is related to the ingestion of toxin contaminated shellfishes from contaminated water[4].Some of the symptoms of DSP include diarrhea, stomach pain, vomiting, nausea and fever; reported human ingestion shows that the toxins are capable of causing stomach tumors and chronic problems to consumers[4].