00:00
Mycoplasma, a bacteria.
00:03
Mycoplasma have distinction of being the smallest free living bacteria
that we know about in Medical Science.
00:11
They are so small that they can pass through a 0.45 µm filter
which actually gets pretty much all other living material
including other small bacteria.
00:22
The mycoplasma are very special
because they lack a peptidoglycan-containing cell wall.
00:29
Remember again that most, in fact all, beta-lactam antibiotics,
the penicillins, the cephalosporins, could only work
by binding to a peptidoglycan, a penicillin-binding protein.
00:42
But mycoplasma would not be able to be treated
by a beta-lactam antibiotic because they lack that wall.
00:49
These organisms are pleomorphic in shape
and you can see several different images of mycoplasma pneumoniae,
one of the types we'll talk about on the slide right now.
00:59
They are not visualized with gram-stain to begin,
because there's not much in their cell wall to be even stained
and they require special growth materials including sterols to be isolated.
01:11
The two human pathogens that we'll talk about in this session
are mycoplasma pneumoniae and mycoplasma hominis.
01:19
Mycoplasma pneumoniae is reflected in the image on the left,
mycoplasma hominis on the right.
The lecture Mycoplasma by Sean Elliott, MD is from the course Bacteria.
Which of the following features best describe Mycoplasma species?
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