Evaluation of the effects of sound exposure and low field electromagnetism on growth and antibiotics susceptibility of some microorganisms

Bulletin of the National Research Centre

Table 6 Antibiotics susceptibility profile for selected Gram-positive bacteria as read in mean diameter of zones of inhibition (mm) after treatment to electromagnetic flux at 15 mT intensity compared with control

Bacteria	PEF	CN	APX	Z	AM	R	CPX	S	SXT	E
B. subtilis ATCC6633	a) 14 ± 1.4 b) 17 ± 3.5	a) 16 ± 1.4 b) 12 ± 2.1	a) 12 ± 2.8 b) R	a) 12 ± 1.4 b) 13 ± 0.7	a) 12 ± 1.4 b) 13 ± 2.8	a) 16 ± 2.1 b) 19 ± 0.7	a) 18 ± 1.4 b) 21 ± 1.4	a) 20 ± 2.8 b) 22 ± 2.8	a) 12 ± 1.4 b) 20 ± 4.9	a) 14 ± 2.8 b) 21 ± 0.7
S. pyogenes ATCC19613	a) 14 ± 2.8 b) 20 ± 2.8	a) 16 ± 2.1 b) 17 ± 2.1	a) 12 ± 2.1 b) 13 ± 1.4	a) 14 ± 1.4 b) 14 ± 1.4	a) 16 ± 1.4 b) 16 ± 2.1	a) 18 ± 4.2 b) 19 ± 1.4	a) 18 ± 1.4 b) 23 ± 1.4	a) 18 ± 1.4 b) 23 ± 1.4	a) 18 ± 1.4 b) 24 ± 0	a) 12 ± 2.1 b) 24 ± 2.1
S. aureus ATCC25923	a) 12 ± 1.4 b) 16 ± 6.7	a) 14 ± 1.4 b) R	)12 ± 2.8 b) R	a) R b) R	a) 16 ± 2.1 b) R	a) 16 ± 1.4 b) 18 ± 3.5	a) 20 ± 1.4 b) 20 ± 0	a) 18 ± 1.4 b) 18 ± 2.8	a) 14 ± 2.8 b) 14 ± 0	a) 14 ± 1.4 b) 17 ± 4.2

a) —Control b) —24 h c) —48 h d) —72 h R—Resistance PEF—Pefloxacin, CN—Gentamycin, APX—Ampicillin + Cloxacillin, Z—Cefuroxime, AM—Amoxacillin, R—Ceftriaxone, CPX—Ciprofloxacin, S—Streptomycin, SXT—Cotrimoxazole, E—Erythromycin