I am not aware of any BACTERIA test strips, that takes a microscope.. Chemicals can be tested for with strips however.. I'm more worried about chemicals these days. Had it not been for a blown engine (Disaster) I'd have returned to the Flint, Michigan area just in time to drink the poison (MAJOR DISASTER) making me feel kind of like the guy in the story who ask GOD why he was having such a bad day.
God replied:
Your car not starting up in the morning meant you did not get to that intersection where the truck ran the stop sign in time to get run over
The battery dying on your phone meant the caller could not record you, edit it and present false witness.
And so on for all the minor disasters he'd had that day.