Abstract
Quality control procedures were monitored in a number of Czech breweries. All Gram positive bacterial contaminants found in the beer were collected and isolated. The occurrence of this contamination was recorded. Gram positive bacteria obtained from the breweries were isolated and identified by API 50 CHL. This method is generally used as a comparative method for identification of lactic acid bacteria. Pasteurised beer was inoculated with all identified bacteria in the absence of oxygen. Haze formation was checked over three months. The results show that different beer spoilage was observed on inoculating beer with isolates identified as identical.
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