Table 2 CINAHL search strategy

1

TI ('clostridium difficile' OR 'c difficile' OR 'c-difficile' OR 'c. difficile' OR c diff' OR 'c-diff' OR 'c. diff' OR clostrid* Carbape* OR "hospital acquired" OR "Cross infection" or nosocomial* OR iatrog*) OR AB ('clostridium difficile' OR 'c difficile' OR 'c-difficile' OR 'c. difficile' OR c diff' OR 'c-diff' OR 'c. diff' OR clostrid* OR Carbap* OR "hospital acquired" OR "Cross infection" OR nosocomial* OR iatrog*)

2

TI ('Urinary-Tract Infections' OR 'Urinary-Tract Infection' OR 'Blood-Borne Pathogens' OR 'acquired pneumonia' OR pneumonia OR 'associated pneumonia' OR flu OR cold) OR AB ('Urinary-Tract Infections' OR 'Urinary-Tract Infection' OR 'Blood-Borne Pathogens' OR 'acquired pneumonia' OR pneumonia OR 'acquired pneumonia' OR 'associated pneumonia' OR flu OR cold)

3

(MM "Urinary Tract Infections, Catheter-Related") OR (MM "Urinary Tract Infections+") 

(MM "Bloodborne Pathogens") OR (MM "Pneumonia, Pneumocystis") OR (MM "Pneumonia, Viral") OR (MM "Pneumonia, Aspiration") OR (MM "Community-Acquired Pneumonia") OR (MM "Pneumonia, Bacterial+") OR (MM "Healthcare-Associated Pneumonia") OR (MM "Pneumonia+") 

4

TI (Gastrointestinalis OR Gastrointestinal OR gastroenteritis) OR AB (Gastrointestinalis OR Gastrointestinal OR gastroenteritis)

5

TI ('Haemophilus influenzae' OR 'Respiratory viruses' OR 'Influenza viruses' OR 'Parainfluenza viruses' OR Adenoviruses OR 'Escherichia coli' OR Shigella OR Rotaviruses OR Noroviruses OR Salmonella OR Rhinoviruses OR Chlamydia pneumoniae OR Enterovirus) OR AB ('Haemophilus influenzae' OR 'Respiratory viruses' OR 'Influenza viruses' OR 'Parainfluenza viruses' OR Adenoviruses OR 'Escherichia coli' OR Shigella OR Rotaviruses OR Noroviruses OR Salmonella OR Rhinoviruses OR Chlamydia pneumoniae OR Enterovirus)

6

(MM "Gastroenteritis+") OR (MM "Haemophilus Influenzae") OR (MM "Haemophilus Infections+")

(MM "Respiratory Syncytial Viruses") OR (MM "Respiratory Syncytial Virus Infections") OR (MM "SARS Virus") OR (MM "Escherichia Coli") OR (MM "Escherichia Coli Infections") OR (MM "Shigella") OR (MM "Dysentery, Bacillary") OR (MM "Rotaviruses") OR (MM "Rotavirus Infections") 

(MM "Chlamydophila Pneumoniae") OR (MH "Salmonella Infections") OR (MM "Caliciviridae Infections")

(MM "Legionella") OR (MM "Enterovirus Infections+") 

7

TI ('COVID 19' OR 'corona virus' OR 'Respiratory syncytial virus' OR 'Respiratory infection' OR 'Respiratory infections') OR AB ('COVID 19' OR 'corona virus' OR 'Respiratory syncytial virus' OR 'Respiratory infection' OR 'Respiratory infections')

8

(MH "Carbapenem-Resistant Enterobacteriaceae") 

9

(MH "Clostridium Infections+") 

10

(MM "Iatrogenic Disease")

11

(MH "Cross Infection+") 

12

(MH "Cross Infection+") OR (MM "Iatrogenic Disease") OR (MH "Clostridium Infections+") OR (MH "Carbapenem-Resistant Enterobacteriaceae") 

13

#1 OR #2 OR #3 OR #4 OR #5 OR #6 OR #7 OR #8

14

(TI Staphylococcus aureus OR AB Staphylococcus aureus) AND (TI methicillin OR AB methicillin)

15

TI VRE OR AB VRE OR TI ERV OR AB ERV

16

(MH "Methicillin-Resistant Staphylococcus Aureus") 

17

(TI Enteroc* OR AB Enteroc*) AND (TI vancomycin OR AB vancomycin)

18

(MH "Vancomycin Resistant Enterococci") 

19

(TI Bacil* OR AB Bacil*) AND (TI Gram OR AB Gram) AND (TI Neg* OR AB Neg*)

20

(TI Bacil* OR AB Bacil*) AND (TI Gram OR AB Gram) AND (TI Neg* OR AB Neg* ) OR (MH "Vancomycin Resistant Enterococci") OR (TI Enteroc* OR AB Enteroc*) AND (TI vancomycin OR AB vancomycin ) OR (MH "Methicillin-Resistant Staphylococcus Aureus") OR TI ERV OR AB ERV OR (TI Staphylococcus aureus OR AB Staphylococcus aureus) AND (TI methicillin OR AB methicillin)

21

#10 OR #11 OR #12 OR #11 OR #12

22

#09 OR #16

23

TI ( Cost* OR econom* OR 'econom* analysis' OR efficienc* OR 'cost effect*' OR 'cost util*' OR 'cost benefit' OR 'cost consequenc*' OR 'cost effic*' ) OR AB ( Cost* OR 'econom* analysis' OR econom* OR efficienc* OR 'cost effect*' OR 'cost util*' OR 'cost benefit' OR 'cost consequenc*' OR 'cost effic*' )

24

(MH "Economics+") 

25

#14 OR #15

26

TI ( controlled clinical trial* OR Randomized controlled trial* OR RCT OR blind OR case control* OR Case* OR cohort* OR longitudinal* ) OR AB ( controlled clinical trial* OR Randomized controlled trial* OR RCT OR blind OR case control* OR Case* OR cohort* OR longitudinal* )

27

(MH "Randomized Controlled Trials+") OR (MH "Clinical Trials+") 

28

(MM "Case Studies") OR (MH "Case Control Studies+") OR (MH "Matched Case Control") 

29

(MH "Prospective Studies+")

30

(MH "Prospective Studies+") OR (MM "Case Studies") OR (MH "Case Control Studies+") OR (MH "Matched Case Control") OR (MH "Randomized Controlled Trials+") OR (MH "Clinical Trials+") 

31

#21 OR #22 OR #23 OR #24

32

TI (Hand* OR Aseptic* OR intervent* OR Program* OR Strateg* OR hygiene* OR Clean* OR control OR prevention OR screen* OR wash OR protect* OR isolation OR sanitation ) OR AB ( Hand* OR Aseptic* OR intervent* OR Program* OR Strateg* OR hygiene* OR Clean* OR control OR prevention OR screen* OR wash OR protect* OR isolation OR sanitation)

33

(MH "Handwashing+") OR (MM "Infection Control") OR (MM "Hygiene") OR (MH "Patient Isolation+")

34

(MH "Handwashing+") OR (MM "Infection Control")

35

(MM "Hygiene") 

36

(MH "Patient Isolation+")

37

#17 OR #20 OR #25 OR #29

38

TI ('Long-Term Care' OR 'Assisted-Living Facilities' OR 'long-term-care facility' OR 'Homes for the Aged' OR 'Nursing Homes' OR 'nursing home' OR 'long-term care' OR retirement home) OR AB ('Long-Term Care' OR 'Assisted-Living Facilities' OR  'long-term-care facility' OR 'Homes for the Aged' OR 'Nursing Homes' OR 'nursing home' OR 'long-term care')