Question

where do certain symbiotic microorganisms normally occur in human body?

Answer 1

Caecum (part of large intestine) contains symbiotic organisms in human body .These are the organisms are notat all harmful for the body rather they are healthy bacteria which are very much necessary in human body .They help in digestion in human body

Answer 2

found in large intestine feeding on the excretory faecal matter or intestinal cells and tissues.. . mostly common seen in ascaris