Tests Strains Lactobacillus delbrueckii subsps. bulgaricus
Gram +
Catalase -
Growth à 15°C -
Growth 37°C +
Growth 45°C +
Growth pH 9.6 -
Growth at pH 3.4 +
Growth 4% Nacl +
Growth 6.5% Nacl -
Growth pH 9.6 +
Resistance at 60°C +
Resistance at 65°C +
Blue milk of Sherman +
Arginine deiminase -
Esculin +
Fermentative type Homofermentative
Levulose -
Glucose +
lactose +
Arabinose -
Sucrose -
• (+): positive response
• (-): negative reaction
Table 2 : Physiological and biochemical tests results of Lactobacillus bulgaricus.