Bacterial Habitat Aerobic, Anaerobes, Microaerophilic, Facultative Infectious Disease Ch1 P6


hello and welcome back to another future
doc house production my producer has asked me to smile and be more likeable
so here it is alright we are continuing our journey on this book that I wrote
with this manuscript that I wrote check it out
download it or actually uh find me on social media and I will send you a link
to it alright yeah bacteria bacteria lives in certain in different many
different environments okay some environments have oxygen some
environments don’t have oxygen now usually I would want to talk about how
oxygen radicals or oxygen products affect bacteria but I decided to talk
about where bacterias live and how they and and and go from there and in the
next video I’ll talk about how bacteria fights against oxygen products all right
um so there are four environments that bacteria is living obligate there some
of them are obligate aerobes and they live in oxygen they use oxygen and needs
oxygen okay they just like us go through the Krebs cycle or tries to click tri
cyclic acid cycle and TCA cycle and performing like glycolysis and respiration
and you know you should know all this stuff um but because they live in an
oxygen environment they need catalase peroxidases and superoxide dismutase now
I will explain on those long medical words later okay
they also can live in areas environments where there’s no oxygen like they are
obligate anaerobes and they hate oxygen and they don’t have or need any enzymes
against oxygen products so because they basically oxygen would be toxic for them
so even bother surviving let alone needing
these enzymes to fight against oxygen products products so those are obligate anaerobes
we also have microaerophilic types of bacteria these bacterias live in
anaerobic environments but they are aerotolerant they can survive with areas
with oxygen okay so they use fermentation predominantly and they have
since they can live in oxygenated environments they’re gonna need some
enzymes to fight against the oxygen products but these do not have catalase
do not have catalase and and we’ll talk about that later
facultative anaerobes again opposite of microaerophilic they prefer an
oxygen-rich environment but they can also grow without oxygen by fermentation
so let’s talk about some examples shall we first of all the obligate aerobes there’s dozens to list so we’re not
going to talk about those let’s talk about the ones that we can memorize or
we can at least group and figure out how to understand the bacterias that would
fit into these groups and help you in your board exams okay all right let’s
talk about obligate anaerobes now these are a group of bacterias that would
would have to live in an environment absent of oxygen and these bacterias
causes a handful of diseases mainly there they they cause diseases that
smell bad okay these bacterias smell bad they also cause necrotizing fascitis I can’t even pronounce it give me two seconds while I look it up
basically flesh-eating bacteria okay and it’s a group A streptococcus (GAS) group A
streptococcus and some flesh-eating bacteria
also known as necro necrotizing fasciitis necrotizing
fasciitis I need to learn English alright and that’s the group A streptococcus predominantly now the foul-smelling
bacterias are Actinomyces Bacteroides and Clostridium now these
bacterias we won’t get into details have a very unique foul smell and when you
think of thousand million bacteria stink obligate anaerobes okay and and it will
help you choose the right answer when diagnosing a patient facultative anaerobes the famous one there’s there’s lots but let’s talk about only
the famous one that one that you will probably get a question on is E. coli
or E. coli and E. coli is found the gut and so but they also survive outside the gut
so you will learn that that they prefer an oxygen environment but they can also
grow without oxygen in the gut by fermentation and finally let’s talk
about microaerophilic bacterias these are Vibrio Campylobacter Legionella
Neisseria and Helicobacter Helicobacter bacteria is the one that is Helicobacter pylorus found in the stomach and it causes a lot of problems and we will get
into details about the Helicobacter but you know in the stomach there is still
oxygen so it’s microaerophilic it is aerotolerant but again also
predominately uses fermentation okay so that’s that we’re gonna discuss
the the enzymes that will break down the oxygen product in the next video again
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