| Extracts | Microorganism (Diameter of inhibition zone (mm) ) | 
      
        | Bacillus    subtiles
          (Gr +ve bacteria) | Escherichia    coli (Gr –ve bacteria) | Candida    albicans
          (yeast) | Aspergillus    niger
          (fungi) | 
      
        | SPS extracted with hot water from Spirulina grown    on medium containing 45 ppm nitrogen | -- | -- | -- | -- | 
      
        | SPS extracted with hot water from Spirulina grown    on medium containing 128 ppm nitrogen | -- | -- | -- | -- | 
      
        | SPS extracted with hot water from Spirulina grown    on medium containing 293 ppm nitrogen | -- | -- | -- | -- | 
      
        | SPS extracted with ethanol from Spirulina grown    on medium containing 45 ppm nitrogen | -- | -- | -- | -- | 
      
        | SPS extracted with ethanol from Spirulina grown    on medium containing 128 ppm nitrogen | -- | -- | 8 | 10 |