| 
      • (+): positive response
        | 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 | - |  • (-): negative reaction
 |