Q fever is a zoonosis caused by the strictly intracellular, gram negative bacterium Coxiella burnetii which proceeds asymptomatic and self-limiting in 60% of the cases. The infectious organism is commonly found in cattle, sheep, goats and other domestic mammals. The infection results from inhalation of contaminated particles in the air. The incubation time is 9-40 days. It is considered possibly the most infectious disease in the world, as a human being can be infected by a single bacterium.
It was first described by Edward Holbroock Derrick in abattoir workers in Brisbane, Queensland, Australia as a disease of unknown origin and therefore “query fever”. In 1937 the bacterium was isolated by Frank MacFarlane Burnet and Freeman from one of Derrick’s patients for the first time and identified as Rickettsia-species. H.R. Cox and Davis isolated the pathogen from ticks in Montana, USA in 1938, described the transmission and it was officially named Coxiella burnetii the same year. Meanwhile Coxiella burnetii is no longer regarded as closely related to Rickettsiae.
More on [ Q fever ]

CDC: Q Fever Caused by Coxiella burnetii - Includes cause, symptoms, diagnosis, prevention, treatment, and significance in bioterrorism.
MedlinePlus Medical Encyclopedia: Q fever - Features cause, symptoms, risk factors, diagnosis, treatment, prognosis, complications, and prevention.
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Q Fever - Information about the disease, the Q-Vax vaccine, and the Victoria, Australia Q Fever Management Program. Includes information and implementation documents for immunization providers and targeted workplaces.
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Q Fever - Factsheet from Australia on the disease.
Meta Description: [ Hunter Area Pathology Service, Australia, The Hunter Region's quality pathology provider ]
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