Tetracycline
Tetracyclines
are
a
group
of
antibiotics
originally
found
in
Streptomyces
bacteria.
Tetracyclines
can
be
used
against
respiratory-tract
infections,
syphilis,
and
acne.
Among
the
tetracyclines,
there
are
chlortetracycline,
doxycycline,
oxytetracycline,
and
the
original
tetracycline.
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