Assertion: pathogen's presence | /r/CapableOf | define the role of certain devices
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Source sentences:
text: demonstrate the presence of legionellae in aerosol droplets associated with suspected bacterial reservoirs define the role of certain devices [e.g., showers, faucets, decorative fountains, or evaporate condensers] in disease transmission; and quantitate and determine the size of the droplets containing legionellae.1436 Stringent controls and calibration are necessary when sampling is used to determine particle size and numbers of viable bacteria.1437 Samplers should be placed in locations where human exposure to aerosols is anticipated, and investigators should wear a NIOSH-approved respirator (e.g., N95 respirator) if sampling involves exposure to potentially infectious aerosols.