The total bacteria and citrate-fermenting bacteria in 72 lactic cultures were enumerated. The numbers of citrate-fermenting bacteria varied from fewer than 10,000 to 2.1 billion per ml. The citrate-fermenting bacteria per ml expressed as per cent of each corresponding total count on Tomato Juice Agar (TJA) had a median of 13%. The mean percentages of citrate-fermenting bacteria were not significantly different among lactic cultures grouped according to their original source, time maintained in the dairy plant, or their particular use.

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