Can Rats Detect Diseases?

In Tanzania, scientists have taught giant rats to detect patients with
tuberculosis.

Rats can detect diseases, according to a 2014 research study in Tanzania.
Scientists trained African giant pouched rats to sniff human saliva samples
to determine which ones are positive for tuberculosis, a bacterial
infection affecting the lungs. Standard tuberculosis detection by humans in
a laboratory consists of examining saliva and mucous samples under a
microscope and can take an entire day, while the trained rats typically
take around seven minutes. The rodents have a much stronger sense of smell
than humans: for every one sniff a human’s nose takes, a rat’s nose can
take eight sniffs. They can also smell multiple scents at one time and
differentiate between them.
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