Rocky Mountain spotted fever


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Rocky Mountain spotted fever,

infectious disease caused by a rickettsiarickettsia
, any of a group of very small microorganisms, many disease-causing, that live in vertebrates and are transmitted by bloodsucking parasitic arthropods such as fleas, lice (see louse), and ticks.
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. The germ is harbored by wild rodents and other animals and is carried by infected ticks that attach themselves to humans. Despite its name, Rocky Mountain spotted fever is most prevalent in the S United States from Virgina, the Carolinas, and Georgia W to Oklahoma; it may be encountered in other tick-infested regions. Symptoms include chills and high fever; a rose-colored skin rash that appears first on the wrists and ankles and spreads to the trunk, the spots turning deep red and running together; headache; and pains in the back, muscles, and joints. In severe cases there may be delirium or coma. Spotted fever is a serious disease; however, it is not usually fatal if prompt antibiotic treatment is administered. Immunization with vaccine is effective.

Rocky Mountain Spotted Fever

 

an acute infectious disease of man, of the group of rickettsioses. A naturally endemic disease, it is encountered in the western hemisphere.

Rocky Mountain spotted fever is usually observed in spring and summer. The causative agent is transmitted by ticks from generation to generation; other reservoirs of the virus include rodents and dogs. The disease develops within two to 14 days after the tick bite. The causative agent may also reach the skin and mucosa when the tick is crushed. The disease is manifested by high fever (39° to 41 °C) and a spotty nodular rash that appears on the second to fifth day. Other symptoms are headache, nausea, vomiting, pains in the bones and muscles, restlessness, and insomnia.

Rocky Mountain spotted fever is treated with antibiotics and oxygen therapy. It is prevented by avoiding tick bites and by disinsectization and immunization.

Rocky Mountain spotted fever

[′räk·ē ′mau̇nt·ən ′späd·əd ′fē·vər]
(medicine)
An acute, infectious, typhuslike disease of man caused by the rickettsial organism Rickettsia rickettsi and transmitted by species of hard-shelled ticks; characterized by sudden onset of chills, headache, fever, and an exanthem on the extremities. Also known as American spotted fever; tick fever; tick typhus.
References in periodicals archive ?
The study noted that while children younger than 10 represent less than 6 percent of Rocky Mountain spotted fever cases, they represent 22 percent of deaths from the disease.
Rocky Mountain spotted fever in the United States, 1997-2002.
Therapeutic delay and mortality in cases of Rocky Mountain spotted fever.
scapularis were among the 1249 ticks submitted to Ball State as part of the Rocky Mountain Spotted Fever Tick Testing and Lyme Disease Surveillance Program.
In California, there have been about 20 dogs from 12 counties diagnosed with canine Rocky Mountain spotted fever from 2006 to summer 2007.
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Diagnostic tests for Rocky Mountain spotted fever and other rickettsial diseases.
Have travellers only got themselves to blame if they go braving the hazards of Rocky Mountain spotted fever, Rift Valley fever or West Nile Virus?
A color atlas shows the geographical distribution of patients with the signs of such conditions as Lyme disease, Rocky Mountain spotted fever, encephalitis, and tularemia.
A wide-ranging tick previously considered to be little more than a nuisance to people is responsible for at least 11 eases of Rocky Mountain spotted fever in eastern Arizona, researchers report.
John Bethell, the emergency room physician on duty, made a "probable" diagnosis of Rocky Mountain Spotted Fever and hospitalized Robin.
Ticks are not just unappealing insects--they can transmit diseases, including Ehrlichiosis, Lyme disease and even Rocky Mountain spotted fever.

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