Healthy populations represent the largest reservoir of bacteria resistant to antibiotics. We investigated the resistance of @entity526 to 12 antibiotics in fecal samples from untreated healthy populations in Shanghai, China by using Kirby-Bauer (K-B) method. The results showed that: (i) All subjects carried resistant strains of @entity526 . (ii) The carriage rates of @entity526 resistant to various antibiotics were different, less than 10% to @entity4509 and 30% to 100% to others. (iii) In the elder @entity1 group aged 10-11 years, the percentages of strains resistant to @entity801 , @entity3639 , @entity2755 , @entity803 , @entity206 , and @entity207 were significantly lower than those in the younger group aged 5-6 years. In the adult group, the percentages of strains resistant to @entity869 , @entity3400 , @entity4509 , @entity3639 , @entity2755 , @entity803 , @entity206 , and @entity207 were significantly lower than those in the elder @entity1 group. (iv) The number of strains resistant to five or more antibiotics accounted for 31.8% in the younger @entity1 group, 23.7% in the elder @entity1 group, and 12.1% in the adult group. These findings suggest that all healthy @entity1 in Shanghai carry resistant strains of @entity526 in the intestine. The younger the populations, the higher the level of resistance of fecal @entity526 coli to antibiotics. Improvement of health behaviors and environmental sanitation and rational use of antibiotics could remarkedly decrease the resistant level of bacteria.

The carriage of XXXX resistant to antibiotics in healthy populations in Shanghai.

@entity1 :: ('9606', 'Species') :: ['children', 'people'] @entity801 :: ('MESH:D005839', 'Chemical') :: ['gentamicin'] @entity4509 :: ('MESH:D000583', 'Chemical') :: ['amikacin'] @entity3639 :: ('MESH:D013307', 'Chemical') :: ['streptomycin'] @entity206 :: ('MESH:D014295', 'Chemical') :: ['trimethoprim'] @entity803 :: ('MESH:D013752', 'Chemical') :: ['tetracycline'] @entity869 :: ('MESH:D000667', 'Chemical') :: ['ampicillin'] @entity3400 :: ('MESH:D010878', 'Chemical') :: ['piperacillin'] @entity207 :: ('MESH:D013420', 'Chemical') :: ['sulfamethoxazole'] @entity2755 :: ('MESH:D002701', 'Chemical') :: ['chloramphenicol'] @entity526 :: ('562', 'Species') :: ['Escherichia', 'Escherichia coli']
@entity526 :: (562,Species) :: ['Escherichia coli']
