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Table 3 Mean minimum inhibitory concentrations (MIC) ± standard deviation (SD) of the species present in the different orders against the Gram-negative bacteria

From: Which tree orders in southern Africa have the highest antimicrobial activity and selectivity against bacterial and fungal pathogens of animals?

Order n (≥9) Mean MIC (mg/ml)
P. aeruginosa E. coli Mean (Gram-negative bacteria)
Myrtales 25 0.28 ± 0.56 0.30 ± 0.59 0.29 ± 0.56a
Fabales 57 0.26 ± 0.55 0.34 ± 0.60 0.30 ± 0.51ab
Malvales 26 0.38 ± 0.73 0.31 ± 0.59 0.34 ± 0.64abc
Ericales 30 0.33 ± 0.77 0.36 ± 0.79 0.34 ± 0.75abc
Apiales 9 0.49 ± 0.66 0.26 ± 0.59 0.36 ± 0.53abcd
Rosales 28 0.37 ± 0.58 0.39 ± 0.58 0.38 ± 0.51abcd
Malpighiales 71 0.43 ± 0.66 0.37 ± 0.71 0.40 ± 0.62acd
Celastrales 19 0.39 ± 0.96 0.44 ± 0.48 0.41 ± 0.68abcd
Sapindales 64 0.45 ± 0.82 0.41 ± 0.84 0.43 ± 0.78cd
Gentianales 64 0.46 ± 0.75 0.43 ± 0.68 0.45 ± 0.67cd
Lamiales 35 0.52 ± 0.88 0.40 ± 0.36 0.46 ± 0.58cd
Magnoliales 9 0.58 ± 0.80 0.42 ± 0.43 0.49 ± 0.59cd
Asterales 11 0.44 ± 0.43 0.57 ± 0.82 0.50 ± 0.52cd
Proteales 28 0.46 ± 0.78 0.78 ± 0.67 0.60 ± 0.70d
Degrees of freedom (DF) 13
F value 2.27
PR > F 0.0065
  1. The orders are arranged from highest to lowest activity (n = the number of tree species analysed in each order; mean MIC values followed by the same superscript letter do not differ significantly at the 5% confidence level).