<unk>  may be classified into three clinically different diseases, all of which vary in disease presentation, organ system affected, and severity: pulmonary infection (Legionnaires' disease), extrapulmonary infection, and Pontiac fever, which has causes only mild disease.<unk>  may also be classified based on the causative species.
Legionellosis classification
Proteus infection classification
Serratia infection classification
Diphtheria classification
Escherichia coli enteritis classification
Leptospirosis classification
Group B streptococcal infection classification
Kyphosis classification