Which sputum color is associated with Pseudomonas infection?

Green sputum is typically associated with Pseudomonas infection due to the presence of a green pigment called pyocyanin produced by the bacteria. This pigment is a characteristic of Pseudomonas aeruginosa, which is known for its role in various infections, especially in immunocompromised patients and those with underlying lung conditions such as cystic fibrosis.

The green color can indicate the body’s response to the infection, as it is often seen in cases where there is a substantial amount of neutrophilic inflammation, which is common in bacterial infections. Additionally, the green hue can also relate to the breakdown of hemoglobin and the presence of other inflammatory mediators. Thus, when diagnosing a Pseudomonas infection, observing green sputum can be an important clinical clue.