I agree that Combat Medics are working under the very worst and most stressful of conditions, but that still does not compare to actually going to medical school for four years (after four years of undergrad schooling). My point is that Dante is posturing himself as a "doctor", when he has no medical degree. Sure, he worked in the trenches under unfathomable conditions and worked on gunshot victims and burn victims, etc, but does he have an microbiology training? When it comes to whatever this "stomach bug" is, he has no training as an internist, nor as as a diagnostician.
My point is, hie is not a medical doctor, yet he wears a white coat (which is traditionally given to med school students at orientation). I think he's a poser, which may or may not come into play in later episodes.