Gastroenteritis : A syndrome characterized by gastrointestinal symptoms including nausea, vomiting, diarrhea and abdominal discomfort

Diarrhea :  Abnormal fecal discharge characterized by frequent and/or fluid stool; usually resulting from disease of the small intestine and involving increased fluid and electrolyte loss.

Dysentery:-  An inflammatory disorder of the gastrointestinal tract often associated with blood and pus in the feces and accompanied by symptoms of pain, fever, abdominal cramps; usually resulting fromdisease of the large intestine

Enterocolitis : Inflammation involving the mucosa of both the small and large intestine . Important Pathogens responsible for GI infections

Caustive organisms:-

Cіtrobacter spp., Campylobacter jejunі, Cardnerella vagіnalіs, Enterobacter spp., Escherіchіa colі,Proteus spp.,  Salmonella spp., Serratia spp., Shіgella spp., Yersinia enterocolіtіca, Bacteroides spp. except Bacteroides fragilis , including B. melanіnogenіcus and other oral cavity microorganisms referred to bacteroides; Clostridium perfrіngens; Fusobacterіum spp.;