title: How far do bacteria travel from the exhalation valve of IPPB equipment?
mesh_terms: D000391:Air Microbiology; D001419:Bacteria / Q000254:growth & development*; D002452:Cell Count; D003470:Culture Media; D008397:Masks; D008851:Micropore Filters; D011175:Positive-Pressure Respiration; D011481:Protective Clothing; D012706:Serratia marcescens / Q000254:growth & development; D013210:Staphylococcus / Q000302:isolation & purification; D013242:Sterilization; D012122:Ventilators, Mechanical
chemical_list: D003470:Culture Media