Mexico Issues Medium-Risk Travel Advisory for United States After Cyclosporiasis Cases Rise to 1,645

The Mexican Ministry of Health issued a preventive travel advisory for its citizens visiting the United States, citing a rise in Cyclosporiasis cases. Newsweek reported that the National Committee for Epidemiological Surveillance raised the risk level to medium. U.S.

Public health agencies recorded a sharp increase in cases beginning in May 2026. Newsweek reported 1,645 confirmed infections across 34 states, with more than 400 clustered in Michigan, Ohio, Kentucky, and West Virginia. Health authorities have not identified the specific food or water source of the contamination, according to the Mexican Ministry of Health.

Newsweek reported that the parasite Cyclospora cayetanensis is transmitted through contaminated food or water and can survive in the environment for up to two weeks. Cyclosporiasis causes an intestinal infection. Symptoms include severe watery diarrhea, abdominal cramps, nausea, and fatigue, with onset between two days and more than two weeks after exposure.