Q fever differential diagnosis

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

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Ahmed Younes M.B.B.CH [2]

Overview

Q fever must be differentiated from other diseases that cause atypical pneumonia such as mycoplasma pneumonia and legionella pneumonia.

Q fever must be differentiated from other diseases that cause atypical pneumonia such as mycoplasma pneumonia and legionella pneumonia.

Disease	Prominent clinical features	Lab findings
Q fever
Mycoplasma pneumonia	Mycoplasma pneumonia can be asymptomatic Headache, nausea and malaise usually precede the onset of symptoms Cough which is intractable and nonproductive	Postitve coomb’s test Leukocytosis Thrombocytosis
Legionella pneumonia	Legionella pneumonia is characterized by cough that is slightly productive Constitutional symptoms such as chills, myalgia, arthralgia Gastrointestinal symptoms such as diarrhea, nausea and vomiting.	Labs are non specific for diagnosing legionella pneumonia Renal and hepatic dysfunction Thrombocytopenia and leucocytosis Hyponatraemia .
Chlamydia pneumonia	There are no specific clinical features for chlamydia pneumonia. Symptoms appear gradually. Chlamydia infection is usually associated with upper respiratory tract symptoms (pharyngitis, sinusitis, etc). It might be associated with extrapulmonary manifestaions as meningitis and guillain barre syndrome.	Chlamydia pneumonia is usually associated with normal WBC count. It's diagnosed with the presence of antichlamydial antibody (through complement fixation or direct immunofluoroscence) or direct antigen detection.