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Table 6 Comparative minimum inhibitory concentrations (mg/ml) of CEOs against bacterial and fungal isolates

From: Bioactivity of Citrus essential oils (CEOs) against microorganisms associated with spoilage of some fruits

Isolates A B C A + B A + C B + C A + B + C
Saccharomyces cerevisiae 75 75 100 50 75 100 50
Candida tropicalis 75 75 100 25 75 75 50
Candida krusei 50 50 50 25 50 50 25
Kluyveromyces marxianus 50 50 50 50 50 50 50
Torulopsis fragaria 0.0 0.0 0.0 100 100 100 100
Pichia kluyveri 12.5 25 50 12.5 25 25 25
Pichia fermentans 25 25 25 12.5 12.5 12.5 12.5
Pichia anomala 12.5 12.5 25 12.5 12.5 12.5 12.5
Geotrichum candidum 25 25 50 25 50 50 25
Zygosaccharomyces rouxii 75 100 100 75 75 100 75
Zygosaccharomyces bailii 100 100 100 100 100 100 100
Aspergillus niger 50 75 100 25 75 75 50
Aspergillus flavus 50 75 100 50 100 100 50
Aspergillus fumigatus 75 75 100 25 75 75 50
Aspergillus parasiticus 75 75 75 75 75 75 50
Mucor piriformis 12.5 25 12.5 25 12.5 12.5 12.5
Mucor racemosis 25 50 25 50 25 25 25
Fusarium oxysporum 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Fusarium avenaceum 100 100 0.0 75 100 0.0 75
Fusarium solani 100 100 100 50 50 50 25
Penicillium digitatum 12.5 12.5 25 12.5 25 25 12.5
Penicillium expansum 25 25 25 25 25 25 12.5
Rhizopus oryzae 75 75 100 50 100 100 50
Rhizopus stolonifer 75 75 100 50 100 100 50
Alternaria alternata 25 50 50 25 50 25 25
Lactobacillus plantarum 75 100 100 75 100 100 75
Bacillus cereus 25 25 50 25 25 25 25
Micrococcus luteus 25 50 50 50 50 50 50
Streptococcus uberis 25 25 50 25 25 25 25
Bacillus subtilis 12.5 12.5 25 6.25 12.5 12.5 12.5
Proteus vulgaris 25 25 25 25 25 25 12.5
Serratia marcescens 50 50 50 25 25 25 25
Streptococcus agalactiae 12.5 25 25 25 25 25 12.5
Pseudomonas aeruginosa 12.5 12.5 50 12.5 25 25 25
Erwinia cacticida 25 25 75 25 50 50 25
  1. A—lime oil, B—lemon oil, C—grapefruit oil, 0.0—no inhibition detected when ≥ 100 mg/ml was used