Chapter 19 : Q Fever

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Q fever is a bacterial zoonosis caused by infection with . Mammals, birds, and ticks are natural hosts of the agent, which they persistently shed into the environment in their secretions, wastes, and products of parturition. Humans most often become infected by inhaling contaminated aerosols, especially those associated with the birth of domesticated animals and with dried tick feces. Although tick transmission of to various species of mammals is well documented, there are no confirmed occurrences of direct transmission to humans by feeding ticks. The organism is prevalent in a wide diversity of wild and domesticated animals, including sheep, goats, cattle, cats, dogs, and birds, and in the ticks that parasitize them. Several researchers have proposed that the continued maintenance of infections in domestic animals might depend upon introductions by tick species that act as bridging vectors from wild animal cycles. Much of the data on the occurrence of in ticks and vertebrate hosts, and on transmission between them, dates to descriptions of the ecology of Q fever published in the mid-20th century. This chapter discusses microbiology, ecology, epidemiology, clinical findings, and laboratory diagnosis of Q fever. It also presents treatment, prophylaxis, prevention, and decontamination of Q fever.

Citation: Thompson H, Dasch G, Dennis D. 2005. Q Fever, p 328-342. In Goodman J, Dennis D, Sonenshine D, Tick-Borne Diseases of Humans. ASM Press, Washington, DC. doi: 10.1128/9781555816490.ch19
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