Most common organism found in acute sinusitis:

Pathophysiology of maxillary sinus: Most common organisms found in acute sinusitis are streptococcus pneumonia, Hemophilus influenzae, Moraxella catarrhalis. In approx 8-10% cases of acute sinusitis, Bacteroid spp and staphylococcus aureus are causative organisms. Organisms that are commonly associated with chronic sinusitis are anaerobic bacteria, such as bacteroids spp, fusobacterium, Streptococci, Veilonella and corynebacterium spp.