| human infection and risk of transmission of chagas disease in hidalgo state, mexico. | new zones with risk of infection for chagas disease were reported in san antonio tezoquipan, caltimacan, and el ahorcado in the hidalgo state of mexico. antibodies to trypanosoma cruzi were detected by enzyme-linked immunosorbent assay and indirect hemagglutination assay in human serum samples. study subjects were also given an electrocardiogram. trypanosoma cruzi was isolated from triatomines collected and its virulence was determined in balb/c mice. seropositive persons were found in the three ... | 2007 | 17297042 |