| Microbial isolates | 
        Frequency of occurrence in 
          leafy spinach samples | 
          | 
       
      
        | Bacteria | 
        Basella alba | 
        Basella rubra | 
       
      
        | Staphylocossus aureus | 
        + | 
        + | 
       
      
        | Bacillus Subtilis | 
        + | 
        + | 
       
      
        | Lactobacillus sp | 
        + | 
        + | 
       
      
        | Serratia marcescens | 
        + | 
        + | 
       
      
        | Proteus mirabilis | 
        + | 
        + | 
       
      
        | Fungi | 
        + | 
        + | 
       
      
        | Aspergillus niger | 
        + | 
        + | 
       
      
        | Mucor mucedo | 
        + | 
        + | 
       
      
        | Aspergillus flavus | 
        + | 
        + | 
       
      
        | Fusarium oxysporum | 
        + | 
        + | 
       
      
        | Penicillium sp | 
        + | 
        + | 
       
     
      + = Present 
    - = Absent |