Summary. The species interactions discussed above are only some of the known interactions that occur in nature and can be difficult to identify because they can directly or indirectly influence other intra-specific and inter-specific interactions.s a result, ecological interactions between individual organisms and entire species are often difficult to define and measure and are frequently dependent on the scale and context of the interactions (Harrison & Cornell 2008; Ricklefs 2008; Brooker et al. 2009).
Generally, people get sick within four to 48 hours after eating spoiled or contaminated food, says HowStuffWorks. According to KidsHealth, food poisoning results from eating foods that contains harmful bacteria or toxins. Bacteria are found everywhere, especially in spoiled leftovers.
Eating raw or undercooked foods is a common cause of food poisoning. Proper cooking destroys bacteria, but they can start to grow on cooked food if it is left out or in the refrigerator for too long. Food also can become contaminated when someone infected with a virus or other âbugâ handles it.owever, some people who are receiving or have recently finished cancer treatment should avoid some foods entirely, even if they may have eaten them with no problems in the past. These include: 1  Cold hot dogs or deli lunch meat (cold cuts)âAlways cook or reheat until the meat is steaming hot. 2  Dry-cured, uncooked salami.