Rock·y Moun·tain spot·ted fe·ver/ˈräkē ˈmount(ə)n spädəd ˈfēvər/
- 1. a rickettsial disease transmitted by ticks.
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- Medically reviewed by Judith Marcin, MD on April 13, 2017 — Written by Jacquelyn Cafasso. 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, and muscle aches.
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5 days ago · Rocky Mountain spotted fever 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. Other symptoms may include muscle pains and vomiting. Long-term complications following recovery may include hearing loss or loss of part of an arm or leg. The disease is caused by Rickettsia rickettsii, a type of bacterium
- What Is Rocky Mountain Spotted Fever?
- Where Is Rocky Mountain Spotted Fever Prevalent?
Rocky Mountain spotted fever (RMSF) is the most serious tick-borne disease in the United States and is caused by Rickettsia rickettsii, a type of bacteria known as rickettsia. These bacteria are transmitted to humans by the bite of certain hard ticks. The two most important species of ticks that can transmit R. rickettsii in the United States are Dermacentor variabilis (the American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick). A third species, Rhipicephalus sanguineus (brow...
Although first recognized in the late 19th century in the Rocky Mountain region, by 1930s this disease was found to be present in the eastern portion of the country as well. The wood tick (Dermacentor andersoni), one of the main tick vectors is found in the Rocky Mountain states and southwestern Canada. The second major vector is the American dog tick (Dermacentor variabilis). This tick is distributed east of the Rocky Mountains and in some regions along the Pacific Coast. The cayenne tick (A...
Symptoms of Rocky Mountain spotted fever usually appear 2 to 14 days (average of 7 days) after being bitten by the infected tick. Fever is often the first symptom experienced by patients. The classic triad of fever, rash and tick bite is present among many but not all cases at the initial visit to the physician. Nausea, vomiting, severe headache, muscle pain and lack of appetite are also sometimes reported by patients in the early stage of disease. Other clinical symptoms include abnormal pla...
Clinical diagnosis of RMSF is based on serological tests including detection of antibody titers via IFA, detection of the bacterial agent via culture or immunohistochemical staining of biopsies, and by detection of bacterial DNA in a clinical specimen via PCR. However, treatment decisions should not be delayed while waiting for confirmation with laboratory results. Patients with a relevant history and symptomology should be treated with the appropriate antibiotic regimen immediately. Since th...
Upon suspicion of Rocky Mountain spotted fever, treatment should begin immediately. Delay of treatment has been associated with fatal outcomes. Treatment with tetracycline or chloramphenicol antibiotics can be used to treat RMSF. Doxycycline (a tetrycycline) antibiotic is the treatment of choice for both adults and children. However doxycycline is not recommended for use by pregnant women. Current recommendations from the Centers for Disease Control and Prevention (CDC) include doxycycline th...
3 days ago · Rocky Mountain spotted fever (RMSF) is a disease caused by a type of bacteria carried by ticks. Alternative Names. Spotted fever. Causes. RMSF is caused by the bacterium Rickettsia rickettsii (R Rickettsii), which is carried by ticks. The bacteria spread to humans through a tick bite. In the western United States, the bacteria are carried by ...
- What Is Colorado Tick Fever?
- Where Is Colorado Tick Fever Prevalent?
Colorado tick fever (CTF), also known as Mountain tick fever or American mountain fever, is a viral disease caused by infection with the Colorado tick fever virus (CTFV), a member of the Coltivirus genera. CTF is transmitted to humans most commonly by the bite of an infected adult wood tick, and while there is no evidence of natural person-to-person transmission, rare cases of transmission by blood transfusion have been reported. The diagnosis of persons with CTF is complicated by non-specifi...
Colorado tick fever occurs primarily in the Rocky Mountain region of the western United States as well as the Canadian provinces of British Columbia and Alberta. More than 90% of all CTF cases in the United States are reported from Colorado, Utah and Montana. The disease is most prevalent during the summer months between April and August, and is usually limited to mountainous elevations between 1,200 and 3,000 meters. Patients with CTF are most often campers and young men, who have been expos...
Clinical manifestations of CTF can range from mild to life-threatening depending on the patient’s age and general health. The first symptoms of CTF usually occur 3-7 days after a tick bite, although the incubation period can be as long as 20 days. The initial symptoms of the disease often include fever, chills, headache, muscular and skeletal pain, and malaise. Other symptoms may include nausea, vomiting, stomach pain, light sensitivity and sore throat. About half of all patients experience a...
An initial diagnosis is based on the patient’s signs and symptoms and confirmation depends on laboratory testing. The appearance of a saddleback fever and the absence of a hemorrhagic rash common to Rocky Mountain spotted fever are clinical indicators of CTF. Leukopenia, a decrease in the number of circulating white blood cells, is the most common laboratory finding in CTF. The immunoflourescent staining of blood smears may be used to identify CTFV antigens, however a confirmed diagnosis can...
No specific treatment for CTF is available. Management of CTF includes treatment of fever and pain with analgesics and acetaminophen, along with standard infection control procedures. Patients infected with CTF should advise blood collection agencies of their illness prior to donation, due to the risk of transmitting CTF through blood transfusion.
3 days ago · Rocky mountain spotted fever takes two hours. Tick-borne relapsing fever takes less than half an hour. To protect yourself against these diseases, use environmental protection agency insect ...
- Nancy Werteen
- What Is Tularemia?
- Where Is Tularemia Prevalent?
Tularemia (also known as rabbit fever) is caused by oval-shaped bacteria (coccobacilli) called Francisella tularensis. F. tularensis is transmitted to humans by the bite of infected ticks, deer flies, contact with infected animals or infected carcasses, inhalation of air-borne bacteria, and ingestion of infected food or water. In the summer, most cases come from infected tick bites. In the winter, cases are reported by hunters who trap and skin infected animals. Person-to-person transmission...
Cases of tularemia have been reported across the United States with a concentration of reports in Missouri, Arkansas, and Oklahoma. From 1990 to 2000, there were 1,368 cases reported in the United States. On average, 124 cases per year were reported during this period of time. A cluster of cases were reported at Martha’s Vineyard (Massachusetts) in 2000. A study published by the journal Emerging Infectious Diseases showed that these cases were associated with landscaping work. Landscape worke...
Symptoms often appear abruptly three to five days after infection, but can take as long as two weeks to appear. A fever of 38°C to 40°C (100.4°F to 104°F) is the most common symptom. Other symptoms include joint pain, swelling of lymph nodes, headache, chills, dry cough, sore throat, ulcers at the site of infection, sore eyes, weakness, and diarrhea.There are several forms of tularemia, each specific to a particular route of entry by F. tularensis into the body. Ulceroglandular tularemia is t...
According to the CDC, a clinical diagnosis of F. tularensis can be confirmed by examining stained secretions, exudates, and biopsy specimens. The definitive confirmation of F. tularensis infection is growth of the bacteria in culture.
The CDC recommends intramuscular and intravenous antibiotic therapy for treatment of tularemia. A more detailed description of dosages recommended by the CDC can be found here. In summary, streptomycin is the recommended drug, with gentamicin serving as an alternative. The CDC recommends that these drugs be administered for 10 days. Both can be used in children and pregnant women.
- What Is Tick-Borne Relapsing Fever?
- Where Is Tick-Borne Relapsing Fever Prevalent?
- Prevention & Control
Tick-borne Relapsing Fever (TBRF) is caused by bacterial spirochete species including Borelliahermsii, Borelliaparkerii, or Borelliaturicatae, with Borelliahermsii being the most common causative agent. The bacteria are transmitted by the bite of soft tick Ornithodoros species. These ticks feed primarily at night. The bite of the tick is usually painless and they feed for only 15 to 30 minutes before dropping off. This makes it difficult to detect the ticks on one’s body. The Ornithodoros sof...
TBRF can occur in most of the western portion of the US (west of the Mississippi River) with most cases occurring west of the Rocky Mountains. Travelers to these endemic states commonly get the disease as well. A high percentage of cases occur among people vacationing in rodent-infested cabins in wooded and mountainous areas.
Tick-borne relapsing fever is characterized by recurring episodes of fever accompanied by other non-specific symptoms including headaches, muscle pain, joint pain, chills, vomiting, and abdominal pain. Bacterial presence tends to be greater among pregnant women, and may sometimes result in more severe infection. Symptoms tend to develop within 7 days after the tick bite. The symptoms last an average of 3 days (range of 3-7 days) and are then followed by an asymptomatic period (no symptoms pre...
A definitive diagnosis of TBRF is made by detecting Borrelia spirochetes in the patient’s smears of blood, bone marrow or cerebrospinal fluid. The best time to detect spirochetes in patient blood samples is when the patient is febrile (feverish).
Symptoms of TBRF often resolve on their own, but treatment with antibiotics can help them resolve much faster. Antibiotics used to treat TBRF include erythromycin, tetracycline, chloramphenicol, and penicillin. The current recommended duration of antibiotic therapy is 7 days. Erythromycin or penicillin antibiotics are recommended for use by young children or pregnant women.
The best way to protect oneself from TBRF is to avoid exposure to rodent and tick-infested dwellings. Homes and vacation cabins should be rodent-proofed and any rodent nesting materials should be removed. Tick exposure can be avoided by fumigating homes with compounds containing permethrins or pyrethrins and using insecticides containing DEET on skin and clothing.
3 days ago · Typhus, also known as typhus fever, is a group of infectious diseases that include epidemic typhus, scrub typhus, and murine typhus. Common symptoms include fever, headache, and a rash. Typically these begin one to two weeks after exposure. The diseases are caused by specific types of bacterial infection.
3 days ago · Fever, also referred to as pyrexia, is defined as having a temperature above the normal range due to an increase in the body's temperature set point. There is not a single agreed-upon upper limit for normal temperature with sources using values between 37.2 and 38.3 °C (99.0 and 100.9 °F) in humans.
2 days ago · Besides fever, this oil can relieve sinus pain, cough, bronchitis, nasal congestion, etc. Just add 2-3 drops to almond, olive or avocado oil and massage on your child's chest. 2. Eucalyptus and Lavender Oil. Also known as "fever oil", eucalyptus oil is one of the most popular essential oils for fever.