The range of the brown recluse has already been expanded by hitching a ride in my personal effects when the Army sent me to West Germany in 1978. I know this because I got a bite on my right calf that the medics couldn’t figure out until the PA saw the festering wound. Antibiotics, both oral and topical, along with a regular debridement with hydrogen peroxide cleared it up and I have no scar today.
You are lucky. From my personal experience,
military medics know a lot about debridement techniques.