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.
County Maps and Atlases: General - Covering the late 1850s through the 1870s. Land Office Map Collection - An index of Land Office maps found in Record Group 17, arranged alphabetically by county and then by township. Melish-Whiteside County Maps - Maps, created between 1816 and 1821, of forty-four counties, Record Group 17.
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
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.
Rocky Mountain Spotted Fever Fact Sheet 1. 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
Historic Pennsylvania County Maps These vintage Pennsylvania maps are provided to help locate the numerous small settlements within a county and to determine the historic boundaries of a county. These maps also show the location of railroad lines and major waterways which were important routes of travel in early days.
- Q Fever in The United States
- Seasonal Trends
- People at Risk
Q fever was made a nationally notifiable disease in the United States in 1999. CDC compiles the number of cases reported by state and local health departments and reports national trends. The number of Q fever cases reported to CDC increased, from 19 cases reported in 2000, to 173 cases reported in 2007. In 2008, the Q fever case definition was changed to allow for the reporting of chronic and acute Q fever separately. During 2008–2013 the number of reported cases decreased slightly, relative to 2007, returning to high levels in 2014. In 2017, 153 acute Q fever cases were reported, as well as 40 chronic Q fever cases. Top of Page
The number of cases of Q fever per million persons varies by state, with cases most frequently reported from western and plains states where ranching and rearing of livestock are common. More than one third of cases (38%) are reported from three states (California, Texas, and Iowa). Sporadic reports of cases may result when people travel to other states or countries and are infected with C. burnetii. Top of Page
Cases of Q fever can occur during any month of the year. Most cases of report illness begin in the spring and early summer months, peaking in April and May. This timeframe is also the peak of birthing season for cattle, sheep and goats. Top of Page
More cases of Q fever are reported in older people, especially men. However, men may be more likely to hold jobs with increased risk for Q fever exposure, such as ranching or livestock management. People who live or spend time near ranches and livestock facilities are at increased risk for Q fever infection. Studies have shown that people with a history of heart valve defects, endocarditis, or heart valve implants may have increased risk of chronic infection and severe disease. Top of Page
Allegheny County: 2017: Allegheny County Imagery 2017 3 inch - Tile Index: Allegheny County: 2017: Allegheny County Imagery 2017 9 inch - Tile Index: Allegheny County: 2017: Allegheny County LiDAR 2017 - DEM 6ft: Allegheny County: 2017: Allegheny County LiDAR 2017 - Hillshade 6ft: Allegheny County: 2017: Allegheny County LiDAR 2017 - las files ...
- Background Information
- Prevention and Control of Ticks on People
- Prevention and Control of Ticks on Animals
Ticks are parasitic arthropods that feed on the blood of vertebrates, particularly mammals (including humans) but also birds, reptiles and amphibians. Many species of ticks can transmit pathogens between animals and to humans, including various parasitic worms, viruses, and bacteria. The most important of these in Pennsylvania are the bacteria that cause Lyme disease and Rocky Mountain spotted fever. There are more than 900 species of ticks worldwide, at least 25 of which occur in Pennsylvania. Of these, two species account for more than 90 percent of identification requests submitted to Penn State: blacklegged tick (Ixodes scapularis) and American dog tick (Dermacentor variablis). Three other species that may be encountered are also covered herein: lone star tick (Amblyomma americanum), Asian longhorn tick (Haemaphysalis longicornis), and winter tick (Dermacentor albipictus).
Lyme Disease or Lyme borreliosis is an infection caused by the bacterial spirochete Borrelia burgdorferi, which is transmitted by ixodid ticks. Humans, dogs, and horses seem to be the most susceptible to the infection. It is a multisystem illness characterized initially by erythema migrans (bullseye rash) and a series of common nonspecific complaints and symptoms including headache, fever, sore throat, and nausea. Left untreated, it may progress to late phase symptoms including debilitating r...
Rocky Mountain Spotted Fever
RMSF is caused by the bacteria Rickettsia rickettsii. The disease was first recognized in the United States during the 1890s, but until the 1930s it was reported only in the Rocky Mountains. By 1963, over 90 percent of all cases were reported east of the Rockies. Rickettsia rickettsia is vectored by American dog ticks and lone star ticks in the eastern US, while it is vectored in the western US by Rocky Mountain wood ticks (Dermacentor andersoni). Symptoms of RMSF include a fever and often a...
Tularemia, which is also called rabbit fever, is caused by the bacterium Francisella tularensis. The bacterium can be vectored by lone star ticks, American dog ticks, Rocky Mountain wood ticks, rabbit ticks (Haemaphysalis leporispalustris), and deer flies, as well as exposure to rabbit blood (e.g., butchering a rabbit without gloves and other protection or via aerosolized blood after a rabbit is struck by a lawnmower). The number of cases in the United States has dropped considerably in the l...
The best way to avoid tick bites is to stay out of wooded or brushy areas. However, this option is not always realistic. Repellents such as DEET (N,N-Diethyl-meta-toluamide) offer considerable protection if applied to clothing and exposed skin. Another protective option is the application of Permanone™, an effective acaricide that contains the synthetic pyrethroid permethrin and is applied as a spray to clothing. It is not approved for use on skin. For more information, see the EPA Repellent Search Tool. Long-sleeved shirts and long pants tucked into socks also aid in preventing tick bites. Light-colored clothing helps to detect the dark-colored tick provided the wearer inspects for ticks intermittently. Hunters and hikers increase their risk of encountering ticks by following deer trails and by resting on the forest floor. However, deer do not carry the pathogen that causes Lyme disease. For other game, like turkey, cooking destroys the bacteria and eliminates any danger of getting...
Lyme disease and other tick-borne diseases also affect livestock and companion animals, in particular dogs and horses. For information on prevention and control in animals, please see the Penn State fact sheets on Protecting Companion Animals Against Ticks in Pennsylvania and Protecting Livestock Against Ticks in Pennsylvania.
View guidance, resources, recommendations, and tools to aid schools across Pennsylvania in preparing for and navigating the 2020-21 school year. Businesses in the Commonwealth that are permitted to conduct in-person operations during the disaster emergency must take precautions to protect their employees, their employees’ families, and their ...