There are 4 calories in 1 ounce of Iceberg Lettuce (Includes Crisphead Types). Calorie breakdown: 8% fat, 76% carbs, 16% protein.
Cryptosporidium (crip-toe-spor-ID-ee-um) is a protozoan, a single-celled parasite that lives in the intestines of animals and people.
Related Issues. 1  Cryptosporidium: Infection - Immunocompromised Persons (Centers for Disease Control and Prevention) 2  Parasites and Foodborne Illness (Department of Agriculture, Food Safety and Inspection Service) Also in Spanish. 3  Travelers' Health: Cryptosporidiosis (Centers for Disease Control and Prevention)