Rocky Mountain spotted fever


Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Wikipedia.

Rocky Mountain spotted fever,

infectious disease caused by a rickettsiarickettsia
, any of an order (Rickettsiales) 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.
..... Click the link for more information.
. The bacterium is harbored by wild rodents and other animals and is carried by infected ticks of several species 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 antibiotic treatment (usually doxycycline) is administered promptly.

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 ?
Correlation of rickettsial titers, circulating endotoxin, and clinical features in Rocky Mountain spotted fever. Arch Intern Med.
"Physicians should be aware of the increase in Rocky Mountain spotted fever," he said.
The sensitivity of various serologic tests in the diagnosis of Rocky Mountain spotted fever. Am J Trop Med Hyg 1986; 35: 840-4.
However, laboratory analysis soon confirmed that some of the ticks carried Rickettsia rickettsii, the bacterium that causes Rocky Mountain spotted fever. Demma later learned that lab tests in 1933 had shown that such ticks could indeed be intentionally infected with R.
And because scientists have learned to identify a bewildering variety of previously unrecognized pathogens - hantavirus, Legionella pneumophila, the Rocky Mountain spotted fever Rickettsia - it sometimes seems as if dangerous diseases are cropping up everywhere.
The American pathologist Howard Taylor Ricketts (1871-1910) was investigating the serious disease of Rocky Mountain spotted fever. In 1906 he had shown that it was spread by cattle ticks.
However, the American dog tick and the lone star tick are proven carriers of Rocky Mountain spotted fever."
The symptoms of the disease resemble those of Lyme disease or Rocky Mountain spotted fever.
When the results came back, his dog was diagnosed with Rocky Mountain spotted fever.
Rocky mountain spotted fever in Brazil still has high mortality rates (20-30%) when compared to other countries.
However, other tickborne illnesses such as Rocky Mountain spotted fever, tularemia, babe- siosis, and ehrlichiosis also contribute to severe morbidity and more mortality each year.
The three fatalities observed in a retrospective analysis of six cases of Rocky Mountain spotted fever (RMSF) in children were associated with either a delayed diagnosis pending laboratory findings or delayed antirickettsia treatment.

Full browser ?