Legionellosis laboratory findings

Legionellosis Microchapters
Home
Patient Information
Overview
Historical Perspective
Classification
Pathophysiology
Causes
Differentiating Legionellosis from other Diseases
Epidemiology and Demographics
Risk Factors
Natural History, Complications and Prognosis
Diagnosis
History and Symptoms
Physical Examination
Laboratory Findings
Chest X Ray
CT
Other Diagnostic Studies
Treatment
Medical Therapy
Prevention
Cost-Effectiveness of Therapy
Future or Investigational Therapies
Case Studies
Case #1
Legionellosis laboratory findings On the Web
Most recent articles
Most cited articles
Review articles
CME Programs
Powerpoint slides
Images
American Roentgen Ray Society Images of Legionellosis laboratory findings All Images X-rays Echo & Ultrasound CT Images MRI
Ongoing Trials at Clinical Trials.gov
US National Guidelines Clearinghouse
NICE Guidance
FDA on Legionellosis laboratory findings
CDC on Legionellosis laboratory findings
Legionellosis laboratory findings in the news
Blogs on Legionellosis laboratory findings
Directions to Hospitals Treating Legionellosis
Risk calculators and risk factors for Legionellosis laboratory findings

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Laboratory Findings

• Complete blood count and differential count - lymphocytopenia and rarely pancytopenia
• Sputum Gram staining - gram negative rods
• Urine antigen test - the urine antigen test is simple, quick, and very reliable; however it will only detect Legionella pneumophila serogroup #1. If the patient has pneumonia and the test is positive then the patient is considered to have Legionnaires’ disease. Also the urine antigen test will not identify the specific subtyping so it cannot be used to match the patient with the environmental source of infection.
• Antibody test - compare antibody levels to Legionella in two blood samples obtained 3 to 6 weeks apart.
• Serum electrolytes - hyponatremia
• Liver function tests - elevated bilirubin levels
• Urinalysis - proteinuria