As cyclosporiasis spreads across US, what goes into a disease outbreak investigation?

Health officials are continuing to investigate as cases of cyclosporiasis spread across the U.S. But what exactly goes into investigating a foodborne outbreak?

Pennsylvania among 9 states included in cyclosporiasis outbreak linked to shredded iceberg lettuce

The CDC expanded the outbreak of cyclosporiasis linked to shredded iceberg lettuce to an additional four states, a CDC official told ABC News on Friday.

US health officials are investigating a new outbreak of a diarrhea-causing parasite

Delaware confirms first case of cyclosporiasis

Delaware recorded its first case of cyclosporiasis this week as the parasitic infection spreads across the country.

What we still don't know about the cyclosporiasis outbreak as cases rise

There may be other potential sources behind the outbreak.