Q fever is a bacterial infection caused by Coxiella burnetii. It is a zoonotic disease primarily affecting livestock like sheep, goats, and cattle, but can spread to humans. Humans usually acquire it through inhaling contaminated aerosols, leading to flu-like symptoms or more severe conditions like pneumonia or hepatitis.
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Q fever was first identified in Queensland, Australia, in 1935 by E.H. Derrick, who initially termed it 'query fever' due to its unknown origin. The causative bacterium, *Coxiella burnetii*, was isolated by Herald R. Cox in 1937. It has since been recognized globally as an important public health concern.
The primary route of transmission to humans is the inhalation of aerosolized bacteria, which are shed in high concentrations by infected animals, especially during birthing. These aerosols can come from contaminated dust, urine, feces, milk, and birth products. Less common routes include consumption of unpasteurized dairy and rarely, tick bites.
Contagious Period: Varies by disease
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Our AI-powered surveillance hasn't detected significant Q fever, Total activity in the past 30 days.
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Currently, Q fever, Total case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.
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Trusted information from leading health organizations
Official guidance from the U.S. Centers for Disease Control and Prevention
View CDC Resources →Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-07-18
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