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.
1 Stools that are black, tarry, or bloody. 2  You recognize symptoms of chemical or toxin food poisoning, such as vomiting, diarrhea, sweating, dizziness, tearing in the eyes, excessive salivation, mental confusion, and stomach pain, beginning about 30 minutes after eating contaminated food. You suspect that you have food poisoning. 2  You have: 3  Any signs of dehydration such as dry mouth, decreased urination, dizziness, or sunken eyes. 4  Any diarrhea in a newborn or infant. 5  Diarrhea that lasts longer than 2 days (one day in a child) or is severe. 6  Severe abdominal pain or vomiting.