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The Growth of Microorganisms in Total Parenteral Nutrition Admixtures

Department of Pharmacy Services, Department of Pathology, Department of Medicine, Hartford Hospital, Hartford, University of Connecticut School of Pharmacy, Storrs, and School of Medicine, Farmington, Connecticut

Robert A. Quercia, M.S.

Department of Pharmacy Services, Department of Pathology, Department of Medicine, Hartford Hospital, Hartford, University of Connecticut School of Pharmacy, Storrs, and School of Medicine, Farmington, Connecticut

Nancy K. Treiber, M.H.S.

Department of Pharmacy Services, Department of Pathology, Department of Medicine, Hartford Hospital, Hartford, University of Connecticut School of Pharmacy, Storrs, and School of Medicine, Farmington, Connecticut

James C. McLaughlin, PH.D.

Department of Pharmacy Services, Department of Pathology, Department of Medicine, Hartford Hospital, Hartford, University of Connecticut School of Pharmacy, Storrs, and School of Medicine, Farmington, Connecticut

Joseph J. Klimek, M.D.

Department of Pharmacy Services, Department of Pathology, Department of Medicine, Hartford Hospital, Hartford, University of Connecticut School of Pharmacy, Storrs, and School of Medicine, Farmington, Connecticut

Total nutrient admixtures (TNAs) containing glucose, amino acids, and lipid emulsion in one container and amino acid/dextrose solutions [conventional total parenteral nutrition (TPN) formulations] were studied in a controlled laboratory experiment for their ability to support the growth of microorganisms. Both TNA and conventional TPN formulations for peripheral and central venous administration with standard additives were inoculated with microorganisms to provide 10¹-10² colony-forming units/ml (CFU/ml) of Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, Klebsiella penumoniae, and Candida albicans. The admixtures were stored at room temperature and samples for quantitative microbiology were taken at time 0, 6, 12, 24, 48, 72, and 96 hr. K. pneumoniae, E. coli, and P. aeruginosa were able to proliferate in central TNAs, but the growth of these organisms was retarded in conventional TPN solutions. In the peripheral formulations, K. pneumoniae and E. coli proliferated in both the TNA and conventional TPN systems, whereas P. aeruginosa grew well only in the peripheral TNA. S. epidermidis was not able to grow in any admixtures tested; however, C. albicans grew well in all admixtures, but growth was slower in the conventional central TPN. In conclusion, peripheral and central TNAs supported the growth of microorganisms significantly better than conventional TPN solutions. (Journal of Parenteral and Enteral Nutrition 11:394-397, 1987)

Journal of Parenteral and Enteral Nutrition, Vol. 11, No. 4, 394-397 (1987)
DOI: 10.1177/0148607187011004394


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