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Surveillance Case Definitions for Current and Historical Conditions Recommend on Facebook Tweet Share Compartir A surveillance case definition is a set of uniform criteria used to define a disease for public health surveillance.
R. rickettsii, the etiologic agent of Rocky Mountain spotted fever (RMSF), is distributed broadly, albeit at a low frequency, in hard ticks throughout the Western Hemisphere . In North and Central America, confirmed cases of RMSF have been documented in Canada, the United States, Mexico, Panama, and Costa Rica (46–51) (Fig. 3 and and4). 4
But as Americans moved westward and became more mobile, epidemics were more widespread. Indian tribes, lacking the immunity some Europeans had, died in great numbers. These are major US epidemics and their geographic areas of concentration; you’ll find full lists at BJ’s Genealogy Site and on Wikipedia.
The case–fatality rate is up to 40% in the absence of specific treatment. Louse-borne typhus fever is the only rickettsial disease that can cause explosive epidemics. Geographical distribution. Typhus fever occurs in colder (i.e. mountainous) regions of central and eastern Africa, central and South America, and Asia.
Scott Michael Rank, Ph.D., is the editor of History on the Net and host of the History Unplugged podcast. A historian of the Ottoman Empire and modern Turkey, he is a publisher of popular history, a podcaster, and online course creator. Read Scott’s Full Bio.
The history of the world, in common parlance, is the history of humanity (or human history), as determined from archaeology, anthropology, genetics, linguistics, and other disciplines; and, for periods since the invention of writing, from recorded history and from secondary sources and studies.
Yellow fever is caused by yellow fever virus, an enveloped RNA virus 40–50 nm in width, the type species and namesake of the family Flaviviridae. It was the first illness shown to be transmissible by filtered human serum and transmitted by mosquitoes, by Walter Reed around 1900.
LDA has compiled maps, graphics, and tables based on the Centers for Disease Control and Prevention (CDC) numbers which are based on CDC’s surveillance criteria. The CDC reported numbers for Lyme disease are said to represent about 10% of actual cases that occur each year. The CDC surveillance criteria are meant for SURVEILLANCE, not DIAGNOSIS, …
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