Q Fever Pneumonia in Southwest Germany: Radiographic and Clinical Findings

Area of Science:

• Infectious Diseases
• Radiology
• Public Health

Background:

• Q fever is a global zoonotic disease with a spectrum of clinical presentations, from mild flu-like symptoms to severe pneumonia and hepatitis.
• Accurate diagnosis of Q fever pneumonia can be challenging, necessitating a clear understanding of its radiographic and clinical manifestations.

Purpose of the Study:

• To characterize the radiographic and clinical features of acute Q fever pneumonia in Southwest Germany.
• To identify key diagnostic indicators for Q fever pneumonia in a retrospective patient cohort.

Main Methods:

• Retrospective analysis of 40 patients diagnosed with IgM-positive Q fever pneumonia between 2006 and 2016.
• Review of clinical, laboratory, and chest radiographic data.
• Standardized interpretation of chest radiographs by two radiologists.

Main Results:

• The predominant radiographic finding was unilateral, segmental air space opacification (82% of patients).
• Common clinical symptoms included fever, cough, and dyspnea, with elevated CRP levels.
• Q fever-related hepatitis was observed in 63% of cases.

Conclusions:

• Unilobar, unilateral, segmental opacities are characteristic radiographic findings of Q fever pneumonia.
• While chest radiography alone cannot definitively differentiate Q fever pneumonia from other community-acquired pneumonias, it should be considered in endemic areas.
• The study highlights the importance of considering Q fever in middle-aged patients presenting with segmental opacities and relevant clinical symptoms.