Final answer:
Hepatitis A and Hepatitis E are most commonly spread through consumption of contaminated food and water, or by fecal-oral transmission. Hepatitis A can be prevented through vaccination, while Hepatitis E is rarer in the U.S. but still poses risks through certain food sources.
Step-by-step explanation:
The types of hepatitis most commonly spread by consuming contaminated food and water, or by fecal contamination, are Hepatitis A and Hepatitis E. Both Hepatitis A (HAV) and Hepatitis E (HEV) can be contracted through the fecal-oral route, which involves ingestion of contaminated material. HAV is known for spreading through exposure to contaminated water or food and is prevented through vaccination. HEV, while rarer in the United States, is most commonly spread by the same route, especially through consumption of undercooked meat such as deer or pork, and shellfish, depending on the genotype of the virus. It is worth noting that Hepatitis D (HDV) can only infect an individual who is already infected with Hepatitis B (HBV).