A person can contract salmonellosis primarily through the following methods:
a) drinking a glass of contaminated water
b) eating a contaminated low-acid canned good
c) eating perishable unrefrigerated food
d) eating food prepared by an unwashed handler
All of these options can potentially lead to salmonellosis, but the most common methods of transmission are through consuming contaminated food or water, especially undercooked poultry, eggs, and unwashed fruits and vegetables. Eating food prepared by an unwashed handler (option d) is also a significant risk factor.