The United States <i>Trypanosoma cruzi</i> Infection Study: evidence for vector‐borne transmission of the parasite that causes Chagas disease among United States blood donors

This report adds 16 cases, including one from the Mississippi investigation, of chronic T. cruzi infection presumably acquired via vector-borne transmission in the United States to the previously reported seven cases. The estimated prevalence of autochthonous infections based on this study is 1 in 354,000 donors. Determining US foci of vector-borne transmission is needed to better assess risk for infection.