In Canadian football, while only 12* players are playing on the field at once, teams need more than just 12* players. They must have an offensive and defensive team. Most highâ¦ school football teams have 1st, 2nd, and 3rd string players, so thirty to forty players is a reasonable number.
Gastroenteritis may result from ingesting chemical toxins (see Chemical Food Poisoning). These toxins are usually produced by a plant, such as poisonous mushrooms, or by certain kinds of exotic seafood and thus are not the product of an infection.
Photo Credit Moussa81/iStock/Getty Images. Hydrogen sulfide is a toxic substance produced mainly during industrial processes. Breathing in hydrogen sulfide gas can cause shortness of breath or even death. Small amounts of hydrogen sulfide are also produced by bacteria in your gut after digestion of certain foods. Low-dose exposure can dull your appetite and produce headaches over time.