Fantasy setting without penicillin. wound with a dirty weapon, doesn't get cleaned until the next day. how long can patient be coherent under care?

Question unclear: Wounds of this nature may create a setting for tetanus, wound infections of many types, and these can create high fevers and confusion. Is that what you mean? These can all be treated if dealt with aggressively. What you must be concerned with is whether the wounded individual also struck their head somewhere.

Clean: Hopefully had tetanus toxoid! clean , keep edges open to drain, soak with peroxide and or warm clean water, see a doctor or corpsman! there is antibiotic in afghan.