Abstract
The phagocytic, bactericidal, and metabolic activity of colostral leukocytes from mothers delivering preterm infants was compared with that of colostral leukocytes from mothers of term infants. In addition, the proliferative capacity of colostral lymphocytes was compared. Preterm adherent colostral leukocytes had a significantly higher phagocytic index than term colostral adherent leukocytes. Mean ± SEM values were 5.4 ± 0.5 versus 2.7 ± 0.2, respectively (p < 0.001). Bactericidal capacity against Escherichia coli and nitroblue tetrazolium reduction of preterm and term colostral leukocytes were comparable. Lymphocyte proliferative response was equivalent in preterm and term milk. We conclude that colostral leukocytes from preterm mothers are at least as functional in their antimicrobial activity and possibly phagocytose even better than the colostral cells of mothers of term infants.
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