RESUMO
Objective To explore the contamination of sewage from hotels and restaurants by Salmonella typhi. Methods 327 sewage samples collected from hotels and restaurants and 176 sewage samples collected from some residential area were detected for Salmonella typhi based on the national standard methods. Results The positive rate of Salmonella typhi in the sewage samples from hotels and restaurants (3.67%) was significantly higher than that from residential area(0.57%), P=0.04(exact probability test).12 strains of Salmonella typhi belonging to 4 sero-groups and 9 serotypes were found in 12 sewage samples collected from hotels and restaurants.One strain of Salmonella typhimurium was only found in one sewage sample collected from residential area. The positive rate of Salmonella typhi in the sewage samples collected during January-March (5.47%) was significantly higher than that during April-June(0.79%) among total 327 sewage samples collected from hotels and restaurants, P=0.033(exact probability test). Conclusion The contamination of sewage from hotels and restaurants by Salmonella typhi and its potential risk to human health should be paid more attention to.