Antimicrobial Potential of Extract from a Pseudomonas aeruginosa Isolate

Table 1

Biochemical tests performed.

Biochemical test	Inference	Reference
Catalase production	Evolution of oxygen gas which indicated the presence of catalase enzyme which converts H2O2 to H2O and O2	[22]
Oxidase production	A colour change from purple to deep blue indicated the presence of oxidase enzyme	[22]
Hydrogen sulphide (H2S) production	Suspended lead acetate paper turns black	[22]
Potassium hydroxide reaction	Thickening slurry which is a characteristic of Gram-Negative bacteria	[22]
Indole production	Red ring colouration on the surface of the suspension	[22]
Methyl red Voges-Proskauer (MRVP)	Red colour in the medium was a positive reaction for MR; Strong red colouration indicated a positive VP test	[23]
Nitrate reduction	Red colouration in media	[22]
Citrate utilisation	Colour change from light blue to green	[23]
Urease production	Production of a pink colour	[23]
Motility	Diffused hazy growth extending out from the line of inoculation	[23]
Starch hydrolysis	Occurrence of a clear zone around the colony	[21]