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

Table 2 Mean minimum inhibitory concentrations (MIC) ± standard deviation (SD) of species present in the different orders against the Gram-positive bacteria

Order	n (≥9)	MIC (mg/ml) (±SD)
Order	n (≥9)	E. faecalis	S. aureus	Mean of Gram-positive bacteria
Celastrales	19	0.23 ± 0.41	0.37 ± 0.69	0.30 ± 0.47^a
Rosales	28	0.21 ± 0.35	0.41 ± 1.04	0.30 ± 0.66^a
Myrtales	25	0.28 ± 0.74	0.31 ± 0.52	0.30 ± 0.53^a
Fabales	57	0.38 ± 0.79	0.41 ± 0.92	0.40 ± 0.81^ab
Ericales	30	0.28 ± 0.47	0.56 ± 1.10	0.40 ± 0.72^ab
Sapindales	64	0.34 ± 0.88	0.52 ± 1.04	0.42 ± 0.92^ab
Malpighiales	71	0.38 ± 0.84	0.53 ± 1.03	0.45 ± 0.86^ab
Malvales	26	0.34 ± 0.57	0.65 ± 0.93	0.47 ± 0.67^abc
Apiales	9	0.44 ± 0.71	0.59 ± 1.04	0.51 ± 0.75^abc
Proteales	28	0.38 ± 0.49	0.71 ± 1.05	0.52 ± 0.73^bc
Lamiales	35	0.44 ± 0.62	0.63 ± 1.00	0.53 ± 0.72^bc
Gentianales	64	0.41 ± 0.67	0.69 ± 1.03	0.53 ± 0.80^bc
Magnoliales	9	0.64 ± 1.40	0.63 ± 1.22	0.63 ± 1.26^bc
Asterales	11	0.58 ± 0.42	1.11 ± 0.78	0.80 ± 0.60^c
Degrees of freedom (DF)				13
F value				2.14
Pr > F				0.0114

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).

ISSN: 2662-7671