purulent inflammation of frontal, maxillary and ethmoid sinuses and close-up view of pseudomonas bacteria

maxillary sinus frontal man pseudomonas aeruginosa frontitis antrum highmore blue pus bacteria paranasal illustration respiratory anatomy human microbial prevention science nose acute treatment bacterial medical inflammation allergic sickness cavity closeup disease anatomical nasal adult healthy health sick infection cold illness medicine headache chronic microbe macro rhinosinusitis rod shaped multidrug resistant superbug nosocomial hospital acquired ethmoid