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  1. Maps - Pennsylvania Historical & Museum Commission

    www.phmc.pa.gov/.../Research-Online/Pages/Maps.aspx

    Historical Maps of Pennsylvania - A website containing many maps not found at the State Archives. Incorporation Dates of PA Municipalities, 1965; Maps of Pennsylvania's Historic Suburbs; Mine Map Atlas - A website of the PA Department of Environmental Protection and Penn State University covering anthracite and bituminous coal fields.

  2. Pennsylvania Historical Maps and Atlases - Historic Map Works

    www.historicmapworks.com/Browse/United_States/State.php?...

    Pennsylvania Historical Maps and Atlases. The state of Pennsylvania collection contains 654 atlases spanning 326 years of growth and development (1681 through 2007).Within the atlases are 24,371 historical maps, illustrations, and histories many of which contain family names ideal for genealogical research.

  3. Historical Topographic Maps - Preserving the Past

    www.usgs.gov/core-science-systems/ngp/topo-maps/...

    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.

    • at A Glance
    • Historical Trends
    • Seasonality
    • Geography
    • People at Risk
    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...
  4. Rocky Mountain spotted fever | Britannica

    www.britannica.com/.../Rocky-Mountain-spotted-fever

    Rocky Mountain spotted fever, form of tick-borne typhus first described in the Rocky Mountain section of the United States, caused by a specific microorganism (Rickettsia rickettsii). Discovery of the microbe of Rocky Mountain spotted fever in 1906 by H.T. Ricketts led to the understanding of other

  5. Rocky Mountain spotted fever - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org/diseases-conditions/rocky...
    • Overview
    • Symptoms
    • Causes
    • Risk Factors
    • Complications
    • Prevention

    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...

  6. Rocky Mountain Spotted Fever Fact Sheet

    www.health.pa.gov/topics/Documents/Diseases and...

    What is Rocky Mountain Spotted fever (RMSF)? - RMSF is a severe disease resulting from infection by Rickettsia rickettsii, a bacterium that is transmitted vertically from the female tick to her offspring. 2. Where does RMSF infection occur in Pennsylvania? - Rocky Mountain spotted fever is found throughout the continental United States with ...

  7. Discover the past of Pennsylvania through State maps in our online collection of old historical maps that span over 250 years of growth. View Pennsylvania Maps such such as historical county boundaries changes, old vintage maps, as well as road / highway maps for all 67 counties in Pennsylvania.

  8. Google Maps

    maps.google.com

    Find local businesses, view maps and get driving directions in Google Maps.

  9. County Type 10 Maps (Historic) - PennDOT Home

    www.penndot.gov/ProjectAndPrograms/Planning/Maps/...

    Government that Works. Rebuild public infrastructure to meet 21st century challenges and needs.