Indiana Hepatitis A Outbreak

Since November 2017, the Indiana State Department of Health (ISDH) has identified an increase of hepatitis A cases in southern Indiana, many of which are tied to a large outbreak in Louisville, Kentucky. Indiana has an average of 20 cases of hepatitis A per year.

Cases have been confirmed in several counties, with the majority being reported in Clark and Floyd counties. The genotype of two of these cases matches that of ongoing outbreaks in Arizona, Kentucky, California, Michigan and Utah. Transmission is presumed to occur person-to-person and through injection drug use; no commercial food product has been identified as being contaminated. Based on current information, populations who are homeless, transient or incarcerated or use illicit drugs are considered at increased risk of exposure to hepatitis A.

If you believe you have been exposed to hepatitis A or are homeless, use injection or non-injection drugs, were recently incarcerated, or had contact with someone who has hepatitis A, contact your health care provider about hepatitis A vaccine.

To reduce the risk of hepatitis A transmission, people who have not received two doses of hepatitis A vaccine may ask their healthcare provider for protection. Additionally, always wash your hands with soap and warm water after going to the bathroom, after changing diapers, and before preparing meals for yourself and others.

Indiana Hepatitis A Outbreak Cases as of June 21, 2018*

*Tables will be updated weekly by 2:00 p.m. each Friday





63 (43%)


Please note: Table does not include all reported hepatitis A cases, only those cases that are identified as outbreak-related. Data are provisional and subject to change.

Confirmed Cases Since November 1, 2017

Meeting the IN Hepatitis A Outbreak Case Definition*


Total Cases















*Outbreak case definition: Confirmed hepatitis A cases (hepatitis A IgM positive with acute symptom onset) with travel or an epidemiological link to any state experiencing an outbreak (Arizona, California, Kentucky, Michigan, Utah), Floyd or Clark Counties Indiana; OR a confirmed case who is homeless, uses illicit drugs, or is a close contact with someone who is homeless or uses illicit drugs.

Hepatitis A Outbreak Resources


Page last updated: June 22, 2018