Subject: Effects of human faeces or chlorides on the body.

Hello;
 (1) I have heard of the effects of dried rat faeces on the human body.  
Can you tell me what danger does dried human faeces play on the human body?
For example, if a sewage system were to back-up below a suspended flooring 
and later becomes dried?
 (2) What can be done to clean a room and monitor any air-borne particles 
from dried faeces?
 (2) What are the long term effects of hydrochloride on the human body?

Re: Effects of human faeces or chlorides on the body.