Microbiological, Biochemical, and Electron Microscopic Characterization of a Pectinatus Strain

Author:

Haikara Auli1,Penttilä Liisa2,Enari T.-M.2,Lounatmaa K.2

Affiliation:

1. Biotechnical Laboratory, Technical Research Centre of Finland, Espoo

2. Department of Electron Microscopy, University of Helsinki, Helsinki, Finland

Abstract

A spoilage organism isolated from turbid beer is described. The bacterium was gram negative, catalase negative, strictly anaerobic, and rod shaped, having flagella only on one side of the cell. The main metabolic product was propionic acid. In addition acetic, succinic, and lactic acids and acetoin were formed. Malonate inhibited the production of propionic acid by the strain studied and by both Pectinatus and Propionibacterium strains. The guanine-plus-cytosine content of deoxyribonucleic acid was 36 mol%. Differences between this strain and Pectinatus strains were 2 to 5 percentage points. Immunofluorescent staining and gel diffusion precipitin tests revealed that the antigenic structure differed from those of Pectinatus strains. The isolated organism can, despite some differences, be regarded as belonging to the genus Pectinatus.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference21 articles.

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