If you are located in a rural area without public water & sewer, you have a septic tank & leech field to take care of the waste (and a well for water supply - not close together!) the microbes in the septic tank break down the waste then it filters out through the leech field. A septic patient is full of microbes but they're not doing good work like those in a septic tank ;)
ORIGIN early 17th cent.: via Latin from Greek sēptikos,‘rotten.’Given that, the usage for the two terms probably came about independently.
Shitty place to be regardless!
I assumed it had to do with bacteria being in each one.
wait, seriously? i know you're PM&R but sheesh, you should at least know the definition of sepsis...