Many types of bacteria can be fatal to humans
and it is hard to say which one is the deadliest.
But before I tell you more about fatal bacteria
let me first tell you that the vast majority
(over 99%) of bacteria is not only harmless but
is actually considered helpful.
>For those bacteria that are fatal the
"deadliest" can be considered in two ways. If
"deadliest" means that one dies quickly then the
bacteria that cause meningitis (this is an
inflammation of linings in the brain and nerves)
are most fatal (within 24 hours if not treated).
Other bacteria can be deadly to many people like
the bubonic plague or cholera. They are
fatal within an few days if they are not treated
with antibiotics. Most of the bacterial infections
can be treated with antibiotics but we are seeing
more and more strains that are resistant due to
overuse of antibiotics. In poor countries people
often can not afford medication.
The last group of bacteria I want to mention
are the ones that make and secrete toxins.
The bacteria themselves are not the problem but
their toxin can be fatal. One example are species
of the bacteria Clostridium. They secrete
toxins causing paralyses and the decease is called
tetanus. In that case killing the bacteria
after it has secreted the toxin does nothing to
reverse the effect of the toxin. That is why you
need to make sure you get your tetanus shots every
ten years. I hope this answers your question. Stay
curious ... and healthy!
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