Intermittent common source spread
In some common-source outbreaks, case-patients may have been exposed over a period of days, weeks, or longer. The epidemic curve of an intermittent common-source outbreak often has a pattern reflecting the intermittent nature of the exposure.
common-source outbreak
A common-source outbreak is one in which a group of persons are all exposed to an infectious agent or a toxin from the same source.
continuous common-source outbreak
In a continuous common-source outbreak, the range of exposures and range of incubation periods tend to flatten and widen the peaks of the epidemic curve.
point-source outbreak
If the group is exposed over a relatively brief period, so that everyone who becomes ill does so within one incubation period, then the common-source outbreak is further classified as a point-source outbreak.
Examples
- The epidemic of leukemia cases in Hiroshima following the atomic bomb blast and the epidemic of hepatitis A among patrons of the Pennsylvania restaurant who ate green onions each had a point source of exposure.
- If the number of cases during an epidemic were plotted over time, the resulting graph, called an epidemic curve, would typically have a steep upslope and a more gradual downslope (a so-called “log-normal distribution”).
WikiMD needs you!
This WikiMD article Intermittent common source spread is a stub.
If you are a subject matter expert or authority on Intermittent common source spread, you can help us.
About | Mission | Paid editors welcome. WikiMD needs you!
<html><link rel="canonical" href="https://wikimd.com/wiki/Intermittent+common+source+spread"> <meta name=”viewport” content=”width=device-width, initial-scale=1″> </html>
| Occupational safety and health | ||||||||
|---|---|---|---|---|---|---|---|---|
|
Medical Disclaimer: WikiMD is for informational purposes only and is not a substitute for professional medical advice. Content may be inaccurate or outdated and should not be used for diagnosis or treatment. Always consult your healthcare provider for medical decisions. Verify information with trusted sources such as CDC.gov and NIH.gov. By using this site, you agree that WikiMD is not liable for any outcomes related to its content. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
