Volume 87, Issue 4 pp. 241-249

Influence of blood prestorage conditions and white blood cell filtration on the bacterial load of blood deliberately inoculated with Gram-positive and Gram-negative pathogens

L. Siblini

L. Siblini

Laboratoire de Bactériologie-Virologie, Faculté de Médecine Jacques Lisfranc, Saint-Etienne, France

Etablissement Français du Sang Auvergne-Loire, Saint-Etienne, France

Search for more papers by this author
B. Lafeuillade

B. Lafeuillade

Etablissement Français du Sang Auvergne-Loire, Saint-Etienne, France

Search for more papers by this author
A. Ros

A. Ros

Laboratoire de Bactériologie-Virologie, Faculté de Médecine Jacques Lisfranc, Saint-Etienne, France

Search for more papers by this author
O. Garraud

O. Garraud

Etablissement Français du Sang Auvergne-Loire, Saint-Etienne, France

Search for more papers by this author
B. Pozzetto

Corresponding Author

B. Pozzetto

Laboratoire de Bactériologie-Virologie, Faculté de Médecine Jacques Lisfranc, Saint-Etienne, France

Correspondence: Bruno Pozzetto, Laboratoire de Bactériologie-Virologie, Hôpital Nord, CHU de Saint-Etienne, 42055 Saint-Etienne cedex 02, France
E-mail: [email protected]Search for more papers by this author
First published: 07 December 2004
Citations: 16

Abstract

Background and Objectives Currently, the bacterial contamination of blood constitutes one of the major infectious risks of transfusion. The aim of this study was to evaluate the bactericidal effect of blood on various bacterial species and to determine the influence of prestorage conditions and white blood cell (WBC) filtration on the reduction of the bacterial load in isolated red blood cells (RBCs).

Materials and Methods The growth kinetics of eight different species of bacteria were studied at 20 °C in deliberately contaminated RBC units. Further experiments evaluated the effect of prestorage conditions and WBC filtration on the viability of two model bacteria (Klebsiella oxytoca and Staphylococcus epidermidis) in comparison to previous results obtained with Yersinia enterocolitica.

Results For bacteria susceptible to the bactericidal effect of blood (mainly Gram-negative rods), a reduction of the bacterial load was obtained within 2 h of prestorage at 20 °C. When the prestorage period was prolonged beyond 3 h at 20 °C, rapid growth was observed with some Enterobacteriaceae. Whereas WBC filtration reduced dramatically the viability of Y. enterocolitica, it had only a minimal effect on the viability of S. epidermidis and K. oxytoca. However, the two latter species of bacteria did not survive prolonged storage at 4 °C.

Conclusions Experiments conducted under realistic conditions are needed to determine whether it would be worthwhile recommending the rapid storage of RBCs at 4 °C after WBC reduction of the blood product.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.