Search results
Results From The WOW.Com Content Network
Common source outbreak of Hepatitis A in Nov-Dec 1978. This epidemic curve shows a presumed first case, known as the index case on November 6, 1978. 4 days later, there was a steep increase in cases, followed by the curve tapering down to zero. Some cases were food handlers, and some secondary cases.
In a common source outbreak epidemic, the affected individuals had an exposure to a common agent. If the exposure is singular and all of the affected individuals develop the disease over a single exposure and incubation course, it can be termed as a point source outbreak.
There are several outbreak patterns, which can be useful in identifying the transmission method or source, and predicting the future rate of infection. Each has a distinctive epidemic curve, or histogram of case infections and deaths. [6] Common source – All victims acquire the infection from the same source (e.g. a contaminated water supply ...
For a given epidemic or pandemic, the average of its estimated death toll range is used for ranking. If the death toll averages of two or more epidemics or pandemics are equal, then the smaller the range, the higher the rank. For the historical records of major changes in the world population, see world population. [3]
The 1993 Milwaukee cryptosporidiosis outbreak was a significant distribution of the Cryptosporidium protozoan in Milwaukee, Wisconsin, and the largest waterborne disease outbreak in documented United States history. It is suspected that The Howard Avenue Water Purification Plant, one of two water treatment plants in Milwaukee at the time, was ...
The Broad Street outbreak was an effect rather than a cause of the epidemic. Snow's conclusions were not predominantly based on the Broad Street outbreak, as he noted that he hesitated to come to a conclusion based on a population that had predominantly fled the neighbourhood and redistributed itself. He feared throwing off results of the study ...
The cases emanated from a major flu outbreak at the farm, which affected nearly 1.8 million chickens. The workers were in the process of destroying those chickens, a process known as culling.
The 1993 Four Corners hantavirus outbreak was an outbreak of hantavirus disease that occurred in the Four Corners region of the US states in Arizona, Colorado, and New Mexico. The outbreak marked the discovery of hantaviruses in the Western Hemisphere that could cause disease and revealed the existence of a novel type of disease caused by ...