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 2 Antibiotics susceptibility profile for selected Gram-positive bacteria as read in mean diameter of zones of inhibition (mm) after exposure to acoustic treatment of 5000 Hz/90 dB compared with control

Bacteria	PEF	CN	APX	Z	AM	R	CPX	S	SXT	E
B. subtilis ATCC6633	a) 14 ± 1.4 b) 26 ± 1.4 c) 16 ± 1.4 d) 16 ± 0.7	a) 16 ± 1.4 b) 20 ± 2.8 c) 16 ± 2.1 d) 12 ± 2.1	a) 12 ± 2.8 b) 27 ± 3.5 c) R d) R	a) 12 ± 1.4 b) 21 ± 0.7 c) R d) R	a) 12 ± 1.4 b) 22 ± 3.5 c) 16 ± 2.1 d) R	a) 16 ± 2.1 b) 15 ± 2.8 c) 14 ± 1.4 d) 14 ± 0	a) 18 ± 1.4 b) 28 ± 2.1 c) 19 ± 1.4 d) 19 ± 0	a) 20 ± 2.8 b) 30 ± 0.7 c) 14 ± 5.7 d) 16 ± 2.1	a) 12 ± 1.4 b) 21 ± 2.1 c) 16 ± 0 d) R	a) 14 ± 2.8 b) 30 ± 3.5 c) 17 ± 0.7 d) R
S. pyogenes ATCC19613	a) 14 ± 2.8 b) 20 ± 1.4 c) 18 ± 1.4 d) 16 ± 0	a) 16 ± 2.1 b) 17 ± 2.8 c) 15 ± 2.1 d) 19 ± 2.8	a) 12 ± 2.1 b) 18 ± 2.1 c) R d) 17 ± 2.8	a) 14 ± 1.4 b) 17 ± 1.4 c) 12 ± 0.7 d) 19 ± 0.7	a) 16 ± 1.4 b) 17 ± 2.1 c) 16 ± 0 d) 17 ± 1.4	a) 18 ± 4.2 b) 15 ± 1.4 c) 18 ± 2.1 d) 16 ± 2.8	a) 18 ± 1.4 b) 19 ± 1.4 c) 18 ± 2.1 d) 19 ± 2.1	a) 18 ± 1.4 b) 19 ± 2.1 c) 15 ± 0 d) 16 ± 2.8	a) 18 ± 1.4 b) 21 ± 0.7 c) R d) R	a) 12 ± 2.8 b) 23 ± 2.1 c) 14 ± 1.4 d) 13 ± 0.7
S. aureus ATCC25923	a) 12 ± 1.4 b) 12 ± 5.7 c) 12 ± 0.7 d) R	a) 14 ± 1.4 b) 14 ± 4.9 c) 12 ± 2.1 d) 15 ± 1.4	a) 12 ± 2.8 b) R c) R d) R	a) R b) R c) R d) R	a) 16 ± 2.1 b) ) R c) R d) ) R	a) ) ) ) ) 16 ± 1.4 b) 15 ± 1.4 c) 17 ± 2.1 d) 15 ± 0.7	a) 20 ± 1.4 b) ) 19 ± 0.7 c) 19 ± 1.4 d) 18 ± 3.5	a) 18 ± 1.4 b) R c) R d) R	a) 14 ± 2.8 b) R c) R d) R	a) 14 ± 1.4 b) R c) R d) R

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