Strategies to Prevent Bacterial Adhesion on Biomaterials - Biomimetics: Advancing Nanobiomaterials and Tissue Engineering - page 188

Type of Bacteria and
Exposure Time

Biological Effects

Magnetic Field Strength Comments

100 mT Static Magnetic
Field

E.coli, S.epidermidis
(4 hours)

Reduction in CFU and
bacterial membrane
was ruptured

Bactericidal effect of SMF
was higher for gram
positive and it was
observed to increase
with increasing exposure
duration [110].

E. coli and Proteus vulgaris
Photobacterium
(7 to 16 hours)

The results support the
concept that bacteria
are quite resistant to
electromagnetic fi elds,
probably because of
compensation and self
regulation.

• The experiments sug-
gest the inability of ELF
(extremely low frequency)
magnetic fi elds on the
viability of bacteria.
• E. coli may be able to toler-
ate even higher tempera-
tures without a change in
protein pattern [116].

1 − 10 mT at 2 − 50 Hz

10 T Secondary structures of

protein in E. coli and
Staphylococcus aureus
(5,10,20,30,40,50 and 60
min.)

The ultra strong static
magnetic fi eld has a
great impact on the
secondary structures
of protein in E. coli and
has little impact on
those of protein in
S. aureus.

The reason might be
related to the shape and
wall structure of the pro-
tein cell, the E coli has a
very thin wall thickness
of 10 nm the magnetic
fi eld force is therefore
easy to penetrate the cell
wall [118].