The number of SFR cases has risen in the last two decades, from 495 cases in 2000, to a peak of 6,248 in 2017. However, cases reported in 2018 were slightly lower.Because of the inability to differentiate between spotted fever group Rickettsia species using commonly available serologic tests, it is unclear how many of those cases are RMSF, and how many resul...The number of SFR cases reported to CDC per year have generally increased over time with distinct increases since the mid-1990s.Notably, while the number of cases and incidence rose, the case fatality rate (i.e., the proportion of SFR patients that died as a result of infection) has declined since the 1940s when tetracyclin...The current case fatality rate for SFRs using surveillance data is still roughly 0.5% of cases.Although SFR cases can occur during any month of the year, most cases reported illness in May–August.This period coincides with the season when adult Dermacentorticks are most active.Seasonal trends may vary depending on the area of the country and tick species involved.SFR cases have been reported throughout the contiguous United States, although five states (Arkansas, Missouri, North Carolina, Tennessee, and Virginia) account for over 50% of SFR cases.In Arizona, RMSF cases have recently been identified in an area where the disease had not been previously seen. From 2003 to 2018, nearly 430 cases were reported with a case-fatality rate of about 5%.SFR cases are more frequently reported in men than in women.People over the age of 40 years account for the highest number of reported cases, however, children under 10 years old represent the highest number of reported deaths.Persons with glucose-6-phosphate dehydrogenase (G6PD) deficiency.Surveillance data shows higher risk for hospitalization in people with compromised immune systems (e.g., resulting from cancer treatments, advanced HIV infection, prior organ transplants, or some m...
- at A Glance
- Historical Trends
- People at Risk
Year Published: 2017 Historical Topographic Map Collection bookmark. The U.S. Geological Survey (USGS) National Geospatial Program is scanning published USGS 1:250,000-scale and larger topographic maps printed between 1884, the inception of the topographic mapping program, and 2006.
Rocky Mountain spotted fever is a serious tickborne illness which can be deadly if not treated early. It is spread by several species of ticks in the United States, including the American dog tick (Dermacentor variabilis) pdf icon [PDF – 1 page], Rocky Mountain wood tick (Dermacentor andersoni) pdf icon [PDF – 1 page], and, in parts of the southwestern United States and Mexico, the brown ...
1-Month, 3-Month, 6-Month, 12-Month, and Year-to-Date National, Divisional, Statewide, and Regional Temperature and Precipitation Maps
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Aug 26, 2017 · Directed by Hendrik Faller. With Julien Caplan, Anya Korzun, Julien Michel, Tom Miller. Hostage in his own home, an incompetent Englishman is forced to team up with his captor to fight off the survivors of a fatal flu epidemic.
Temperature readings come from weather stations in the Global Historical Climatology Network. Scientists collect the highest and lowest temperature of the day at each station for the entire month. After they check data quality, they calculate the station’s monthly average and plot it on a gridded map.
The most current maps are available from The National Map and US Topo quadrangles. TopoView shows the many and varied older maps of each area, and so is useful for historical purposes—for example, the names of some natural and cultural features have changed over time, and the 'old' names can be found on these historical topographic maps.
- 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...
As many as 900,000 deaths have been attributed to the typhus fever during the Crimean War in 1853-1856. In America, a typhus epidemic killed the son of Franklin Pierce in Concord, New Hampshire in 1843 and struck in Philadelphia in 1837. Several epidemics occurred in Baltimore, Memphis and Washington, D.C. between 1865 and 1873.