A contagious disease is an infectious disease that is readily spread (that is, communicated) by transmission of a pathogen through contact (direct or indirect) with an infected person.[1]
A disease is often known to be contagious before medical science discovers its causative agent. Koch's postulates, which were published at the end of the 19th century, were the standard for the next 100 years or more, especially with diseases caused by bacteria. Microbial pathogenesis attempts to account for diseases caused by a virus.
The disease itself can also be called a contagion.
Originally, the term referred to a contagion (a derivative of 'contact') or disease transmissible only by direct physical contact. In the modern-day, the term has sometimes been broadened to encompass any communicable or infectious disease. Often the word can only be understood in context, where it is used to emphasize very infectious, easily transmitted, or especially severe communicable diseases.
In 1849, John Snow first proposed that cholera was a contagious disease.
Most epidemics are caused by contagious diseases, with occasional exceptions, such as yellow fever. The spread of non-contagious communicable diseases is changed either very little or not at all by medical isolation of ill persons or medical quarantine for exposed persons. Thus, a "contagious disease" is sometimes defined in practical terms, as a disease for which isolation or quarantine are useful public health responses.[2][failed verification]
Some locations are better suited for the research into the contagious pathogens due to the reduced risk of transmission afforded by a remote or isolated location.
^"Merriam-Webster dictionary definition of contagious disease". www.thefreedictionary.com. Retrieved 2009-11-27.
^"How To Prepare For Emergencies". www.redcross.org. Retrieved 2009-11-27. A primer from the CDC on quarantine and its uses against contagious disease spread
February 16, 2024
contagious, disease, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, septem. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Contagious disease news newspapers books scholar JSTOR September 2020 Learn how and when to remove this template message A contagious disease is an infectious disease that is readily spread that is communicated by transmission of a pathogen through contact direct or indirect with an infected person 1 A disease is often known to be contagious before medical science discovers its causative agent Koch s postulates which were published at the end of the 19th century were the standard for the next 100 years or more especially with diseases caused by bacteria Microbial pathogenesis attempts to account for diseases caused by a virus The disease itself can also be called a contagion Contents 1 Historical meaning 2 Effect on public health response 3 See also 4 ReferencesHistorical meaning editOriginally the term referred to a contagion a derivative of contact or disease transmissible only by direct physical contact In the modern day the term has sometimes been broadened to encompass any communicable or infectious disease Often the word can only be understood in context where it is used to emphasize very infectious easily transmitted or especially severe communicable diseases In 1849 John Snow first proposed that cholera was a contagious disease See also Epidemic and Diseases and epidemics of the 19th centuryEffect on public health response edit nbsp This clinic uses negative room pressure to prevent disease transmissionMost epidemics are caused by contagious diseases with occasional exceptions such as yellow fever The spread of non contagious communicable diseases is changed either very little or not at all by medical isolation of ill persons or medical quarantine for exposed persons Thus a contagious disease is sometimes defined in practical terms as a disease for which isolation or quarantine are useful public health responses 2 failed verification Some locations are better suited for the research into the contagious pathogens due to the reduced risk of transmission afforded by a remote or isolated location Negative room pressure is a technique in health care facilities based on aerobiological designs See also editGerm theory of disease Herd immunity Notifiable diseaseReferences edit Merriam Webster dictionary definition of contagious disease www thefreedictionary com Retrieved 2009 11 27 How To Prepare For Emergencies www redcross org Retrieved 2009 11 27 A primer from the CDC on quarantine and its uses against contagious disease spread Retrieved from https en wikipedia org w index php title Contagious disease amp oldid 1198724163, wikipedia, wiki, book, books, library,
