Hepatitis A is an infection of the liver caused by the hepatitis A virus. Small children usually have no or mild symptoms. Older children and adults experience fever, a general feeling of unwell, nausea, loss of appetite and/or pain in the stomach area followed within a few days by jaundice. Hepatitis A is spread by consuming contaminated food or water, or close or sexual contact with an infected person. This disease is more common in countries with poor sanitation and overcrowding. For more information, see the health unit's fact sheet on hepatitis A.
The following graph shows the number of hepatitis A cases in Simcoe Muskoka between 2000 and 2015. There have been between zero and six hepatitis A cases in Simcoe Muskoka every year since 2000. In 2015, there were no cases of hepatitis A reported in Simcoe Muskoka.
The following graph shows the incidence rate of hepatitis A in Simcoe Muskoka and Ontario between 2000 and 2015. Both rates have remained low during this time period. In 2015, the incidence rate for Hepatitis A in Simcoe Muskoka was 0.0 cases per 100,000 population and Ontario’s incidence rate was 0.51 cases per 100,000 population.
There are many factors that influence how many cases are reported to the health unit, as explained on the Infectious Diseases page.
Provincial definitions classify cases as confirmed, probable or suspect based on clinical and/or laboratory diagnostic criteria. The provincial case definition for Hepatitis A changed in April 2009 to include a definition for probable cases whereas before there was no such classification. The definitions of confirmed and probable cases from 2009 onwards are comparable to confirmed cases before 2009.