I've yet to come across a good breakdown of infection types, probably due to both lack of records and insufficient knowledge, but I can provide an illuminating example. At the Battle of Shrewsbury in 1403, England's Prince Henry (the future Henry V) was shot in the face by an arrow which penetrated deeply. He was treated by the surgeon John Bradmore, receiving medical care that was cutting-edge for the time, including the use of honey as an antiseptic, and survived the ordeal without suffering infection.

In Bradmore's account of the post-op treatment he administered, he mentions using "ointment to soothe the muscles" in order to reduce the risk of "spasm, which was [his] greatest fear." It is generally agreed that he was referring to tetanus, and as he had significant experience in dealing with battle wounds, we can extrapolate from there that he had seen tetanus infections before and that they presented a major threat above and beyond that of sepsis or other potential complications.

For further reading on the young prince's injury, including the surgeon's description of his procedure, here's a publicly available source I found: http://historyofdentistry.co.uk/index_htm_files/2006Nov3.pdf

If you expand your purview outside the medieval period, a good era to look for more information on would be the U.S. Civil War, for which I'm sure there's quite a bit of available documentation on medical treatment. If your hospital is associated with an academic institution, or if there's a medical school nearby whose library you could access, that'd be a great place to investigate further.