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Unusual dissemination of pseudomonads by ventilators

Three patients acquired Pseudomonas pneumonia while they received mechanical ventilation. Detailed microbiological studies on these cases showed direct surface spread of pseudomonads from ventilator tubing into the airways. The ventilator tubing was not sterilised properly by liquid disinfectant due to air‐trapping and inadequate drying. Proper cold sterilisation not only of nebulisers and humidifiers, but also of ventilator tubings, is emphasised.