The nation’s largest multi-state outbreak of cyclosporiasis linked to shredded iceberg lettuce has expanded to nine states, the Centers for Disease Control and Prevention said Friday. The four newly linked states – Illinois, Kansas, Oklahoma and Pennsylvania – join Indiana, Kentucky, Ohio, West Virginia and hard-hit Michigan. Cyclospora is a microscopic parasite that typically infects people through contaminated food or water and causes cyclosporiasis, a gastrointestinal illness that can result