matériau (1) infection (1) hôpital (1) épidémiologie (1) ligne (1) ordre (1) taux (1) densité (1) Mexique (1) Epidemiology (1) Density (1) Costs (1) Prevention (1) Programs (1) Patients (1) Order (1) Nosocomial infections (1) Infection (1) Hospitals (1) Epidemiology (1) Density (1) Cross infection (1) Age groups (1) Patients (1) Number (1) Hospitals (1) Infections (1)