Which route is primarily associated with Hepatitis A transmission?

Hepatitis A is primarily transmitted through the fecal-oral route, which means that the virus is shed in the stool of an infected person and can contaminate food or water. This can occur when proper hand hygiene is not followed, particularly after using the restroom, and can also arise from consuming food or water that has been contaminated by fecal matter. This mode of transmission is particularly relevant in areas with inadequate sanitation and hygiene practices.

The fecal-oral route is distinct from the other methods listed. Blood transfusion, airborne particles, and needle exposure are associated with different types of hepatitis or other infections, but not with Hepatitis A specifically. Hepatitis B and C can be transmitted through blood, while diseases like influenza are typically transmitted through airborne particles. This highlights the importance of recognizing how various infectious agents spread and implementing appropriate public health measures to prevent outbreaks, particularly in settings where sanitation may be compromised.