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Microbial Contamination of Enteral Feeding Tubes Occurring During Nutritional Treatment

From Institut Jean-Godinot, Laboratoire de Microbiologie Médicale, Reims Cedex

François Marechal, MD

Hôpital Général, Département de Médecine Interne, Unité d'Oncologie Médicale, Macon Cedex

Salvador Nasca, MD

Institut Jean-Godinot, Département d'Oncologie Médicale, Reims Cedex, France

Enteral nutrition is an effective treatment for catabolic patients with normal intestinal absorption. However, tube-fed patients are at risk from superinfection. Our study is the first to evaluate in vivo the microbial contamination of solutions staying in the nasogastric tube of cancer patients receiving nutritional preparations. After daily feeding, the tube was rinsed with nonsterile tap water. Tap water staying overnight in the tube was considered as tube-rinsing solution. Microbial burden of nutritional preparations was determined on the fifth day of enteral nutrition, from opening the first container and throughout feeding. The next day, a sample of the tube-rinsing solution was cultured. All bacterial species were identified and antibiotic susceptibility pattern was assessed. Thirty-one cancer patients were included, 12 on the hospital's preparations and 19 on commercial feeding. Seven of the hospital—and none of the commercial—preparations were contaminated. Among the 48 samples collected during feeding, 16 were contaminated, including 10 hospital and 6 commercial preparations. All the 31 tube-rinsing solutions were contaminated and 102 strains cultured. Their median concentration was 10⁶ colony-forming units/mL (range 10-10¹⁰). The strains were 48 Enterobacteriaceae, 20 group D streptococci, 9 Candida albicans, 9 Pseudomonas aeruginosa, and 16 others. Multiple antibiotic resistance was present in 12 of the 102 strains. Lower resistance was present in 33. The predominant microorganism of the tube-rinsing solution caused a bacterial colonization for three febrile patients. In conclusion, the feeding tube is an important reservoir for multiple antibiotic-resistant bacteria. (Journal of Parenteral and Enteral Nutrition 16:552-557, 1992)

Journal of Parenteral and Enteral Nutrition, Vol. 16, No. 6, 552-557 (1992)
DOI: 10.1177/0148607192016006552


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