Intestinal Immunoglobulin A Response to Naturally Acquired Enterotoxigenic Escherichia coli in US Travelers to an Endemic Area of Mexico.

Studies several students in the U.S. for fecal immunoglobulin A response to their homologous infecting enterotoxigenic Escherichia coli (ETEC) and to heat-labile (LT) toxin of ETEC. Information on ETEC; Methods used; Frequency of local antibody responses to homologous ETEC bacteria and to LT toxin in several travelers with ETEC diarrhea.