inflammation of maxillary sinuses and close-up view of staphylococcal bacteria

maxillary sinus sinusitis staphylococcus antrum highmore paranasal illustration respiratory anatomy human mrsa staphylococci microbial prevention science nose acute treatment bacterial medical inflammation allergic sickness cavity closeup disease anatomical nasal adult healthy sick infection cold illness medicine bacteria headache chronic microbe macro rhinosinusitis cocci coccus spherical hospital acquired