The study found that the occurrence of difficult-to-treat infections in U.S. hospitals mirrored the rate of antibiotic prescribing in communities served by those hospitals, generally rising during flu season and subsiding in the spring and summer months.
"Operations Director Carlos Murrieta pointed out that we have reduced the occurrence of accidents in recent years, " Pemex said on its Twitter page, adding that its accident rate was below international standards for similar companies.