To get the dirt on dining out, ABC News Consumer Correspondent Elisabeth Leamy went undercover at 10 restaurants in three states. She took swab samples from 10 surfaces you come typically in contact with at a restaurant. Then Dr. Philip Tierno and his team at the New York University Microbiology Department lab tested the samples.
What's dirtiest? The condiments? Do bacteria pull up a chair and join you at the table?
Read on -- the results may surprise you. Visible goop didn't always translate into bad bugs, and some spotless surfaces harbored major microbes.