Biofilm formation on enteral feeding tubes by Cronobacter sakazakii, Salmonella serovars and other Enterobacteriaceae

Hurrell, E, Kucerova, E, Loughlin, M, Caubilla-Barron, J and Forsythe, SJ ORCID: 0000-0002-6709-0712, 2009. Biofilm formation on enteral feeding tubes by Cronobacter sakazakii, Salmonella serovars and other Enterobacteriaceae. International Journal of Food Microbiology, 136 (2), pp. 227-231. ISSN 0168-1605

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Abstract

WHO (2007) recommended that to reduce microbial risks, powdered infant formula should be reconstituted with water at temperatures >70 °C, and that such feeds should be used within 2 h of preparation. However, this recommendation does not consider the use of enteral feeding tubes which can be in place for more than 48 h and can be loci for bacterial attachment. This study determined the extent to which 29 strains of Cronobacter sakazakii, Salmonella serovars, other Enterobacteriaceae and Acinetobacter spp. can adhere and grow on enteral feeding tubes composed of polyvinyl chloride and polyurethane. The study also included silver-impregnated tubing which was expected to have antibacterial activity. Bacterial biofilm formation by members of the Enterobacteriaceae was ca. 105-106 cfu/cm after 24 h. Negligible biofilm was detected for Acinetobacter gensp. 13; ca. 10 cfu/cm, whereas Cr. sakazakii strain ATCC 12868 had the highest biofilm cell density of 107 cfu/cm. Biofilm formation did not correlate with capsule production, and was not inhibited on silver-impregnated tubing. Bacteria grew in the tube lumen to cell densities of 107 cfu/ml within 8 h, and 109 cfu/ml within 24 h. It is plausible that in vivo the biofilm will both inoculate subsequent routine feeds and as the biofilm ages, clumps of cells will be shed which may survive passage through the neonate's stomach. Therefore biofilm formation on enteral feeding tubes constitutes a risk factor for susceptible neonates.

Item Type: Journal article
Publication Title: International Journal of Food Microbiology
Creators: Hurrell, E., Kucerova, E., Loughlin, M., Caubilla-Barron, J. and Forsythe, S.J.
Publisher: Elsevier
Date: 2009
Volume: 136
Number: 2
ISSN: 0168-1605
Identifiers:
NumberType
10.1016/j.ijfoodmicro.2009.08.007DOI
Rights: Copyright © 2009 Elsevier B.V. All rights reserved.
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:20
Last Modified: 09 Jun 2017 13:26
URI: http://irep.ntu.ac.uk/id/eprint/11284

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