We investigated the occurrence of drug-resistant Vibrio cholerae among patients in the Hospital Regional de la Seguridad Social in San Pedro, Sula, Honduras. 11 patients were studied; five children and six adults. Stool samples were collected in sterile containers and processed for V cholerae isolation. Colonies presumptively identified as V cholerae were tested for antibiotic resistance with standardised disk diffusion. All suspect V cholerae isolates were sent to the INCIENSA Reference Laboratory for Cholera (Tres Rios, Costa Rica) for confirmation and serotyping. They reported that all strains were V cholerae O1, biotype El Tor, serotype Ogawa. Results of antibiograms indicated that 27% (3/11) of the patients were infected with multidrug-resistant strains. These strains were resistant to tetracycline, trimethoprim-sulfamethoxazole, kanamycin, gentamicin, chloramphenicol, ampicillin, cephalothin, and doxycycline. Isolates were sensitive to all other antibiotics tested (table). All patients recovered after administration of intravenous rehydration fluid and antibiotic treatment consisting of either tetracycline, trimethoprim-sulfamethoxazole, or erythromycin. Patients infected with multidrug-resistant strains were treated with nalidixic acid. Antimicrobial-resistant strains of V cholerae have been previously documented from cholera endemic areas. Latin America, however, has not been host to endemic cholera for over a century. Honduras witnessed its first case of cholera from the new pandemic on Oct 13, 1991. The rapid appearance of multidrug-resistant strains in Latin America may be due to overuse of antibiotics in this area of the world or may indicate that strains of multidrug-resistant cholera are becoming more prevalent as the dominant infecting form of the organism. A report from Guatemala indicated that 47% (7/15) of cholera isolates obtained from patients in Guatemala City were resistant to furazolidone, sulfisoxazole, and streptomycin. Guatemalan and Honduran isolates differ from the Latin American epidemic strain, which has been generally susceptible to antibiotics. Two of the drugs against which the cholera strains developed resistance in our study, tetracycline and trimethoprim, are the two first-line drugs used in Honduras and many other developing countries because they are relatively inexpensive. The development of resistance to