title: Resistance of disposable drapes to bacterial penetration.
abstract: OBJECTIVE
  To test the bacterial penetrability of disposable non-woven drapes used specifically for total hip arthroplasty.
  
  
  METHODS
  12 round agar plates were inoculated with 107 colony-forming units/ml of coagulase-negative staphylococci (CNS) and incubated in air at 37 degrees Celsius for 18 hours to obtain a semi-confluent growth of organisms. Six brands of disposable drapes were tested; each was assigned to 2 plates. Each disposable drape was placed between a round agar plate and an inverted square agar plate filled with blood agar. After 30 and 90 minutes, the square agar plates were removed and incubated for 48 hours and inspected for growth of CNS.
  
  
  RESULTS
  Bacterial penetration was time dependant. Certain brands of drapes were more impenetrable than others; none was impenetrable at all time points, but most remained so or allowed passage of fewer than 100 colony-forming units at 90 minutes.
  
  
  CONCLUSIONS
  It is recommended that drapes be rigorously tested with regard to their resistance to bacterial penetration.
authors.affiliation: Department of Orthopaedic Surgery, University of Bristol, Bristol, United Kingdom. ashley.blom@nbt.nhs.uk
authors.forename: A W
authors.initials: AW
authors.lastname: Blom
authors.forename: A
authors.initials: A
authors.lastname: Barnett
authors.forename: P
authors.initials: P
authors.lastname: Ajitsaria
authors.forename: A
authors.initials: A
authors.lastname: Noel
authors.forename: C M
authors.initials: CM
authors.lastname: Estela
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D001419:Bacteria / Q000254:growth & development*; D015169:Colony Count, Microbial; D004866:Equipment Contamination; D017053:Infection Control / Q000379:methods; D008422:Materials Testing / Q000379:methods; D011481:Protective Clothing; D013530:Surgical Wound Infection / Q000382:microbiology* / Q000517:prevention & control*; D013997:Time Factors