- Risk Factors
Rocky Mountain spotted fever is a bacterial infection transmitted by a tick. Without prompt treatment, Rocky Mountain spotted fever can cause serious damage to internal organs, such as your kidneys and heart.Although it was first identified in the Rocky Mountains, Rocky Mountain spotted fever is most commonly found in the southeastern part of the United States. It also occurs in parts of Canada, Mexico, Central America and South America.Early signs and symptoms of Rocky Mountain spotted fever...
Although many people become ill within the first week after infection, signs and symptoms may not appear for up to 14 days. Initial signs and symptoms of Rocky Mountain spotted fever often are nonspecific and can mimic those of other illnesses: 1. High fever 2. Chills 3. Severe headache 4. Muscle aches 5. Nausea and vomiting 6. Confusion or other neurological changes
Rocky Mountain spotted fever is caused by infection with the organism Rickettsia rickettsii. Ticks carrying R. rickettsii are the most common source of infection.If an infected tick attaches itself to your skin and feeds on your blood for six to 10 hours, you may pick up the infection. But you may never see the tick on you.Rocky Mountain spotted fever primarily occurs when ticks are most active and during warm weather when people tend to spend more time outdoors. Rocky Mountain spotted fever...
Factors that may increase your risk of contracting Rocky Mountain spotted fever include: 1. Living in an area where the disease is common 2. The time of year — infections are more common in the spring and early summer 3. How much time you spend in grassy or wooded areas 4. Whether you have a dog or spend time with dogsIf an infected tick attaches to your skin, you can contract Rocky Mountain spotted fever when you remove it, as fluid from the tick can enter your body through an opening such a...
Rocky Mountain spotted fever damages the lining of your smallest blood vessels, causing the vessels to leak or form clots. This may cause: 1. Inflammation of the brain (encephalitis). In addition to severe headaches, Rocky Mountain spotted fever can cause inflammation of the brain, which can cause confusion, seizures and delirium. 2. Inflammation of the heart or lungs. Rocky Mountain spotted fever can cause inflammation in areas of the heart and lungs. This can lead to heart failure or lung f...
You can decrease your chances of contracting Rocky Mountain spotted fever by taking some simple precautions: 1. Wear long pants and sleeves. When walking in wooded or grassy areas, wear shoes, long pants tucked into socks and long-sleeved shirts. Try to stick to trails and avoid walking through low bushes and long grass. 2. Use insect repellents. Products containing DEET (Off! Deep Woods, Repel) often repel ticks. Be sure to follow the instructions on the label. Clothing that has permethrin i...
- What Is It?
- Expected Duration
- When to Call A Professional
- Further Information
Rocky Mountain spotted fever is a severe illness caused by tiny bacteria called Rickettsia rickettsii, which are transmitted through the bite of an infected tick. In the eastern United States and in California, the infected tick is usually Dermacentor variabilis, the American dog tick. In most of the western United States, the tick is more likely to be Dermacentor andersoni, the Rocky Mountain wood tick. Humans typically become infected in the spring and early summer. Once someone is bitten b...
Typically, symptoms begin 2 to 14 days after a tick bite, with an average of 1 week. During the first 3 days of symptoms, an infected person usually has a fever of more than 102 degrees Fahrenheit and a severe headache. Muscle aches, nausea and vomiting are common. Between the 3rd and 5th day of fever, most people develop a rash, which usually begins on the wrists and ankles, then spreads to the arms, legs and trunk. In about two-thirds of patients, the rash also involves the palms of the han...
The classic features that may lead your doctor to suspect Rocky Mountain spotted fever are high fever, rash, headache, and a history of tick exposure, such as walking in a tick-infested area, within 14 days of developing the symptoms of Rocky Mountain spotted fever. Only about 60% of patients recall being bitten by a tick. The early symptoms of Rocky Mountain spotted fever are not specific, and diagnostic tests often are negative early in the disease. Therefore, if your doctor suspects that y...
Symptoms of Rocky Mountain spotted fever begin 2 to 14 days after a bite by an infected tick. Most cases of Rocky Mountain spotted fever respond to appropriate antibiotic treatment within a week. Once symptoms develop, a person can die within 2 weeks without proper treatment.
Because there is no vaccine against Rocky Mountain spotted fever, the most effective way to prevent the illness is to avoid walking in wooded areas or fields where ticks are found. If you must walk in tick-infested areas, follow these precautions: 1. Wear light-colored clothing, which allows you to promptly identify a clinging tick. 2. Wear long-sleeved shirts and pants that are snug around the wrists and ankles. 3. While you are outdoors, check yourself for ticks every two hours. 4. Use an a...
Rocky Mountain spotted fever is treated with one of the tetracycline drugs, usually doxycycline (sold as a generic), in adults and children over age 9. In general, tetracyclines should not be prescribed for pregnant women and children under the age of 9 because these antibiotics can permanently stain the teeth. However, doxycycline is the best available antibiotic to treat this potentially life threatening infection and is preferred if Rocky Mountain spotted fever is the likely diagnosis, des...
Call your doctor immediately if you develop fever, headaches and nausea, with or without a rash, after you have been bitten by a tick. Even if you don't remember being bitten, call your doctor if you develop these symptoms and you have walked recently in tick-infested areas.
Before effective antibiotics were available, 20% to 25% of people with Rocky Mountain spotted fever died. Now, however, only about 5% of patients die from this illness. Older patients have a slightly higher risk of death than younger ones, and males have a higher risk than females.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.Medical Disclaimer
Rocky Mountain spotted fever (RMSF) is a bacterial disease spread by ticks. It typically begins with a fever and headache , which is followed a few days later with the development of a rash .  The rash is generally made up of small spots of bleeding and starts on the wrists and ankles. 
Apr 15, 2020 · Rocky Mountain spotted fever (RMSF) is a disease caused by the bacteria Rickettsia rickettsii (transmitted by tick bites to humans) that has nonspecific symptoms of fever, chills, headache, and muscle aches with progression to a rash about five to 10 days after an initial bite by an infected tick.
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How contagious is Rocky Mountain spotted fever?
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How does rocky mountain spotted fever start?
In Rocky Mountain spotted fever, the bacterium Rickettsia rickettsii lives and reproduces in the Ixodidae (ik-SAH-dih-day) family of hard-bodied ticks, such as the American dog tick and the Rocky Mountain wood tick, before it infects people. Once it does infect a person, it enters cells lining the blood vessels and can cause serious disease.
CLINICAL PRESENTATION. Rickettsial diseases are difficult to diagnose, even by health care providers experienced with these diseases. Most symptomatic rickettsial diseases cause moderate illness, but some Rocky Mountain and Brazilian spotted fevers, Mediterranean spotted fever, scrub typhus, and epidemic typhus may be fatal in 20%–60% of untreated cases.
Aug 28, 2018 · Rocky Mountain spotted fever (RMSF) is a bacterial infection spread by a bite from an infected tick. It causes vomiting, a sudden high fever around 102 or 103°F, headache, abdominal pain, rash ...
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What Causes Rocky Mountain Spotted Fever? Bacteria called Rickettsia rickettsia cause RMSF. Ticks spread the bacteria when they bite a person. Infections are most common in the southeastern part of the United States, but can happen in other states. Is Rocky Mountain Spotted Fever Contagious?
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