Question

Many microbial pathogens enter our gut along with food. In your opinion what are the preventive barriers to protect the body from such pathogens? What type of immunity do you observe in this case?

Answer 1

The preventive barriers that protect the body from microbial pathogens entering through the gut along with food include:

1. Physical barriers: The mucus coating of the epithelium lining the gut traps microbes entering the body.
2. Physiological barriers: Saliva in the mouth contains substances that inhibit microbial growth, and the gastric juice in the stomach secretes hydrochloric acid which destroys microbes.

These barriers collectively help prevent microbial pathogens from colonizing and infecting the gut. The type of immunity observed in this case is innate immunity (also called natural or non-specific immunity), which is present from birth and acts as the first line of defense against pathogens in a non-specific manner.