Isolates Gelatinase Methyl red Urease Catalase Indole production Starch utilization H2S production After 48 hrs. After 120 hrs. A-1 + + + + - - - A-2 + + + + - - - A-3 + + - + - - - A-4 + + - + - - - A-5 + + - + - - - A-6 + + + + + - - A-7 + + + + + - - A-8 + + + + + - - A-9 + + + + + - - A-10 + + + + + - -

Table 4: Tests for specific breakdown products of isolates.