Which toxic agents may poison the food?

Answer:

Pesticide
Discussion:
The known causes of food poisoning can be 
divided into two categories: infectious agents and toxic agents. Infections agents include viruses, bacteria, and parasites. Toxic agents include poisonous mushrooms, improperly prepared exotic foods (such as barracuda – ciguatera toxin) or pesticides on fruits and vegetables.
What does the text tell us about?
Answer:
Food poisoning
Discussion: 
Many cases of food poisoning are not reported because people suffer mild symptoms and recover quickly. Also, doctors do not test for a cause in every suspected case because it does not change the treatment or the outcome.
In the text above the writer mainly intends to
Explain how and why food poisoning
Discussion:
More than 250 known disease can be 
transmitted through food. It is estimated that unknown or undiscovered agent cause 68% of all food-borne illness and related hospitalizations.
  Pembentukan Kecamatan Megang Sakti 1996