A hepatitis A infection exposure explanation: which is most likely?

A hepatitis A infection exposure explanation: which is most likely?

• A. Did you have any sexual encounters when you were on vacation?
• B. Because of the air circulation in planes, it is likely you got the virus on the flight.
• C. Hepatitis A is endemic to tropical countries.
• D. You most likely ingested contaminated food or water.

Answer: (D)

Hepatitis A is spread primarily through the fecal-oral route, most often by ingesting food or water that has been contaminated with the virus. This route explains why the most likely exposure is contaminated food or drink, especially in settings with questionable sanitation or when consuming shellfish or street food in areas with higher HAV prevalence. The other ideas aren’t as probable explanations. Sexual transmission can occur with hepatitis A but is less common than ingestion of contaminated food or water. Plane air circulation isn’t a typical mode of transmission for HAV. Saying the virus is endemic to tropical countries isn’t precise enough to pinpoint the exposure and doesn’t address how people commonly contract the virus. So, ingesting contaminated food or water best accounts for a typical hepatitis A exposure.

Hepatitis A is spread primarily through the fecal-oral route, most often by ingesting food or water that has been contaminated with the virus. This route explains why the most likely exposure is contaminated food or drink, especially in settings with questionable sanitation or when consuming shellfish or street food in areas with higher HAV prevalence.

The other ideas aren’t as probable explanations. Sexual transmission can occur with hepatitis A but is less common than ingestion of contaminated food or water. Plane air circulation isn’t a typical mode of transmission for HAV. Saying the virus is endemic to tropical countries isn’t precise enough to pinpoint the exposure and doesn’t address how people commonly contract the virus.

So, ingesting contaminated food or water best accounts for a typical hepatitis A exposure.