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Immunocytochemical detection of milk proteins in tracheal aspirates of ventilated infants: A pilot study

In this study, we evaluated immunocytochemical staining for milk proteins (α‐lactalbumin and β‐lactoglobulin) in tracheal aspirates of mechanically ventilated infants, and assessed whether this staining technique supported a clinical diagnosis of aspiration in infants receiving orogastric feedings. All newborns requiring mechanical ventilation in the neonatal intensive care unit of a major tertiary care hospital were potential subjects for this study. Tracheal aspirates were obtained prior to the introduction of enteral feeding and at various time points thereafter in newborns requiring mechanical ventilation. Cells were obtained and processed for immunocytochemical staining of α‐lactalbumin and β‐lactoglobulin.