Q fever

Q fever is an illness that causes acute or chronic phases in humans. The infectious agent, the Coxiella burnetii bacterium, is acquired after contact with infected animals, especially goats, sheep, and cattle, or exposure to environments contaminated with the urine, feces or amniotic fluid of infected animals. The acute symptoms usually develop within 2-3 weeks of exposure, although as many as half of humans infected with C. burnetii do not show symptoms. The combination of symptoms varies greatly from person to person, but often present as: high fevers (up to 104-105°F), severe headache, general malaise, myalgia, chills and/or sweats, non-productive cough, nausea, vomiting, diarrhea, abdominal pain, and chest pain. Complications with serious cases may include pneumonia, granulomatous hepatitis (inflammation of the liver), myocarditis (inflammation of the heart tissue), central nervous system complications, and pre-term delivery or miscarriage.

Chronic Q fever may present within 6 weeks after an acute infection or may manifest months or years later. The three groups at highest risk for chronic Q fever are pregnant women, immunosuppressed persons and patients with a pre-existing heart valve defects. Although the majority of people with acute Q fever recover completely, a post-Q fever fatigue syndrome (QFS) has been reported to occur in 10-25% of acute patients. This syndrome is characterized by constant or recurring fatigue, night sweats, severe headaches, photophobia (eye sensitivity to light), pain in muscles and joints, mood changes, and difficulty sleeping.

In a 2015 study, QFS patients were compared with CFS patients: "In all analyses QFS patients were as fatigued and distressed as CFS patients, but reported less additional symptoms. QFS patients had stronger somatic attributions, and higher levels of physical activity. No differences were found with regard to inflammatory markers and in other fatigue-related cognitive-behavioural variables."

Dr. Dragan Ledina writes about Q Fever and ME/CFS.

Netherlands Epidemic
In 2005, Q fever was diagnosed on two dairy goat farms in the rural farm land in the southern area of the Netherlands. By 2010, more than 4,000 human cases were diagnosed, overwhelming the hospital, health care and veterinary care systems. Development of chronic Q fever (QFS) in infected patients remains an important problem in the Netherlands to this day.

Notable Studies
Q Fever (coxiella burnetti) is a bacterium that causes disease in humans. Q Fever is known to trigger chronic fatigue in some patients, often referred to as Q Fever Fatigue Syndrome (QFS) or CFS.

Coxiella burnetii dormancy in a fatal ten-year multisystem dysfunctional illness: case report.

A 2016 literature review concluded that: "Long-term fatigue following acute Q-fever, generally referred to as QFS, has major health-related consequences. However, information on aetiology, prevention, treatment, and prognosis of QFS is underrepresented in the international literature."

In 2002, D. Raoult wrote an essay, "Q fever: still a mysterious disease" for QJM: An International Journal of Medicine and which he stated: "It has been reported following Q fever in Australia6 and in the UK.7 In contrast, few cases of post‐Q‐fever fatigue have been documented from France and Canada.1 Wildman et al., in this issue of the journal, found that in the follow‐up of patients with Q fever, fatigue and idiopathic chronic fatigue were found in nearly 65% of patients, twice as frequently as in controls. Whether this fatigue is psychological in origin, or directly caused by the bacterium, is unknown." Raoult, D. (2002). Q fever: Still a mysterious disease. Qjm, 95(8), 491-492. doi:10.1093/qjmed/95.8.491 Retreived http://dx.doi.org/10.1093/qjmed/95.8.491

http://qjmed.oxfordjournals.org/content/95/12/832.long