What type of culture is performed to evaluate pathogenic organisms from sinus infections?

The type of culture performed to evaluate pathogenic organisms from sinus infections is an upper respiratory culture. This procedure specifically targets the upper respiratory tract, which includes areas such as the nasal passages and sinuses, where infections like sinusitis originate. By collecting samples from this region, the culture can detect the presence of bacterial, viral, or fungal pathogens responsible for the infection.

In contrast, stool cultures are utilized to identify pathogens in the gastrointestinal tract, and blood cultures are used to detect microorganisms in the bloodstream, often related to systemic infections. Sputum cultures focus on the lower respiratory tract, primarily assessing conditions like pneumonia or bronchitis. Therefore, the upper respiratory culture is the most appropriate choice for evaluating sinus infections.