From: Clara cell protein in bronchoalveolar lavage fluid: a predictor of ventilator-associated pneumonia?
Criteria |
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I. At least three positive results of the following four criteria |
   1. Rectal temperature > 38°C or < 35.5°C |
   2. Blood leucocytosis (> 10 × 10³/mm³) and/or left shift of blood leucopenia (< 3 × 10³/mm³) |
   3. > 10 leukocytes per high-power magnification field in Gram stain of tracheal aspirate |
   4. Positive culture from tracheal aspirate |
II. New, persistent progressive infiltrate visualised on chest radiograph |