The common cold is a viral infectious disease that infects the upper respiratory system. It is also known as acute viral rhinopharyngitis, or acute coryza. Being the most common infectious disease in humans, the cold is mainly caused by coronaviruses or rhinoviruses.
If you have bacterial gastroenteritis, bacteria have caused an infection in your gut. This usually results in your stomach and intestines becoming inflamed, and youâll probably experience unpleasant symptoms such as vomiting, severe abdominal cramps and diarrhea.umerous kinds of bacteria can cause gastroenteritis, including: 1  yersinia (found in pork). 2  staphylococcus (found in dairy products, meat, and eggs). 3  shigella (associated with water and found in swimming pools). 4  salmonella (found in meat, dairy products, and eggs).
The H. pylori bacteria burrow into the cells of the stomach lining and cause low grade inflammation. H. pylori is the most common cause of gastric ulcers and gastritis (gastro=stomach +itis=inflammation).Ten percent of those infected may develop an ulcer.elicobacter pylori (H. pylori) is a type of bacteria responsible for widespread infection with more than 50% of the world's population infected, even though most of those infected have no symptoms.