I love low tech solutions to problems.  That’s why I used my fountain pen to ink this drawing.  In Detecting Turberculosis: No Microscopes, Just Rats by Nicholas Bakalar we find that in Tanzania using Gambian pouched rats to test samples for tuberculosis has been accepted as a way of diagnosing patients.  The rats are, in fact, considerably better at detecting TB than examining samples under a microscope.  Then there is also the very accurate machine that costs $17,000 plus $17 for each test, but this is a prohibitive cost for many places where facilities are minimal.  Rats!

 

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