The two most common bacterial pathogens isolated in acute community-acquired maxillary sinusitis in adults are:

• A Anaerobic streptococci and Bacteroides species
• B Staphylococcus aureus and Moraxella catarrhalis
• C Pseudomonas aeruginosa and Klebsiella pneumoniae
• D Streptococcus pneumoniae and Haemophilus influenzae ✓

Explanation

Acute bacterial rhinosinusitis follows viral upper respiratory infection with secondary bacterial invasion, and Streptococcus pneumoniae followed by Haemophilus influenzae are the leading isolates worldwide, including Indian series. Moraxella catarrhalis is a less common third organism seen more in children. Staphylococcus aureus and gram-negative bacilli matter in nosocomial or nosocomial-type sinusitis such as in intubated patients, and anaerobes dominate in odontogenic sinusitis, not typical community-acquired disease.

Reference: Dhingra's Diseases of Ear, Nose and Throat, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.