Table 1. The bibliographic search strategy.

Concept	Keywords	PubMed Search Builder
Hospital-acquired infection	Hospital-acquired infection, cross-infection	(“Cross Infection/drug therapy”[MeSH] OR “Cross Infection/etiology”[MeSH] OR “Cross Infection/microbiology”[MeSH] OR “Cross Infection/prevention and control”[MeSH] OR “Cross Infection/therapy”[MeSH] OR “Cross Infection/transmission”[MeSH])
Microbial drug resistance		(“Drug Resistance, Microbial/analysis”[MeSH] OR “Drug Resistance, Microbial/drug effects”[MeSH] OR “Drug Resistance, Microbial/epidemiology”[MeSH] OR “Drug Resistance, Microbial/etiology”[MeSH] OR “Drug Resistance, Microbial/prevention and control”[MeSH] OR “Drug Resistance, Microbial/statistics and numerical data”[MeSH] OR “Drug Resistance, Microbial/therapy”[MeSH] OR “Drug Resistance, Microbial/trends”[MeSH])