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Journal of Clinical Microbiology, June 1999, p. 1693-1698, Vol. 37, No. 6
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Use of a Murine O-Antigen-Specific Monoclonal Antibody To Identify Acinetobacter Strains of Unnamed Genomic Species 13 Sensu Tjernberg and Ursing

Ralph Pantophlet, Lore Brade, and Helmut Brade*

Division of Medical and Biochemical Microbiology, Research Center Borstel, Center for Medicine and Biosciences, D-23845 Borstel, Germany

Received 10 December 1998/Returned for modification 28 January 1999/Accepted 22 February 1999

A monoclonal antibody against the O-antigenic polysaccharide chain of the lipopolysaccharide (LPS) of Acinetobacter strains belonging to the unnamed genomic species 13 Sensu Tjernberg and Ursing (13TU) was obtained after immunization of BALB/c mice with heat-killed bacteria and was characterized by enzyme immunoassay and Western blot analysis, by use of LPS and proteinase K-treated bacterial lysates, analyses in which the antibody was shown to be highly specific for the homologous antigen. In addition, when tested in dot and Western blots, reactivity was observed with 9 of 18 Acinetobacter strains of genomic species 13TU which had been isolated in Germany and Denmark; no reactivity was observed with strains of other genomic species, including the closely related genomic groups 1 (A. calcoaceticus), 2 (A. baumannii), and 3 (unnamed), or with other gram-negative bacteria. The antibody described here represents a convenient reagent for the simple, economical, and accurate differentiation of clinical isolates of genomic species 13TU from other Acinetobacter strains. Although the antibody does not identify all isolates of this genomic group, it is evident that it will be a useful reagent in the development of a serotyping scheme for clinical laboratories.

* Corresponding author. Mailing address: Division of Medical and Biochemical Microbiology, Research Center Borstel, Center for Medicine and Biosciences, Parkallee 22, D-23845 Borstel, Germany. Phone: 49-4537-188474. Fax: 49-4537-188419. E-mail: hbrade{at}fzborstel.de.

Journal of Clinical Microbiology, June 1999, p. 1693-1698, Vol. 37, No. 6
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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