Question

The pungent odour of faeces is due to presence of:
a.) Indole
b.) Skatole
c.) Various gases
d.) All the above

Answer 1

Faeces are the waste matter remaining after food has been digested, discharged from the bowels, excrement. The Faeces are formed in the colon and pass down into the rectum by the process of peristalsis. Faeces normally have an unpleasant smell. Foul-smelling stools have an unusually strong, putrid smell. In many cases, foul-smelling stools occur due to the foods people eat and the bacteria present in their colon.

Complete step by step answer:
The foods that people eat get digested and the nutrients are taken from that digested food by the absorption during this process different nutrients goes under different process like carbohydrates are going through the fermentation and this give rise some gases, so one of the reason of the smell of the faeces is the generation of the various gases. This makes the option (C) correct.
Food also contains bacteria which are present in their colon. The action of the bacteria gives rise to the production of the toxic amines known as “Indole” and “Skatole” by the action on the amino acid. So, the smell of the faeces is also due to the amines “Indole” and “Skatole”. Hence option (A) and option (B) is also correct.
So, from the above discussion we see that all the options (A), (B), (C) are correct and option (D) says all the above options.
So, the correct answer is “Option D”.

Note: These are the reasons when the person is healthy but the foul-smelling of the faeces may be due to some other reasons also. So, some of the reasons of the foul-smelling of the faeces are as follows:
1.) Taking the medicines like antibiotics.
2.) Some internal infection also leads to the foul-smelling of the faeces.
3.) Lactose inheritance is also responsible.
4.) Milk allergy.
5.) Celiac disease.