Pectinatus, Megasphaera and Zymophilus

  • Auli Haikara
  • Ilkka Helander


First described in the late 1970s (Lee et al., 1978; Weiss et al., 1979), Pectinatus and Megasphaera are both anaerobic, Gram-negative contaminants of unpasteurized beer. The anaerobic, Gram-negative Zymophilus, isolated from pitching yeast, was described in 1990 along with a new Selenomonas sp. (Schleifer et al., 1990). The new genus and species Pectinatus cerevisiiphilus (Lee et al., 1978) and new species Megasphaera cerevisiae (Engelmann and Weiss, 1985) were proposed on the basis of genetic and phenotypic differences existing between these new isolates and related genera or species described in [{}Bergey’s Manual of Systematic Bacteriology] (Rogosa, 1984). The new species Pectinatus frisingensis, although already isolated in 1978 and identified as P. cerevisiiphilus in 1981 (Haikara et al., 1981b), was finally established in 1990 (Schleifer et al., 1990) simultaneously with the description of a new genus comprising the two species Zymophilu...


Alcohol Content Dimethyl Trisulfide Spoilage Organism Brewery Waste Sodium Fusidate 
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Authors and Affiliations

  • Auli Haikara
  • Ilkka Helander

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