Legionella pneumophila Serogroup 1

**Semantic type:** Bacterium

**Definition:** A subgroup of Legionella pneumophila differentiated by its antigenicity. Serogroup 1 is the serogroup most commonly associated with disease, responsible for 70-90% of cases of legionellosis.

**Synonyms:** - LEGIONELLA PNEUMOPHILA SEROGROUP 1