Could a parasitic illness be the reason an
entire population was thought of as lazy?
That may in part be what rampant hookworm
infections did to the rural poor in the American
South for over a century.
I’m Anna Rothschild and this is Gross Science.
Human hookworms are nematodes that live in
warm, moist climates throughout most of the
world.
You get them by coming in contact with contaminated
soil, say by running around barefoot.
That’s when tiny hookworm larvae, under
a millimeter long, can wriggle into your skin.
This isn’t painful, but it might cause a
little itchiness at the point of entry, called
“ground itch.”
Meanwhile, the larvae begin a grand tour of
your body.
They enter your bloodstream and pass through
your heart en route to your lungs.
Then, they migrate up your windpipe into your
throat and you swallow them, at which point
they make the long journey down your digestive
tract.
Finally, they end up in your small intestines
where the larvae mature, mate, and bite into
the lining of your gut to drink your blood,
often for years at a time.
The females release thousands of eggs per
day, which you poop out, starting the cycle
again.
People have been known to have hundreds of
worms in their guts at a time.
And the more worms you have, the worse your
symptoms can be.
A hookworm infection rarely kills you on its
own, but it can cause anemia, protein deficiency,
gastrointestinal problems, weight loss, and
fatigue.
Basically, it makes you weak and tired.
And if you have a bad case of it as a child,
the severe anemia can lead to stunted growth
and cognitive development.
And that’s where the stigma of the lazy,
slow Southerner comes in.
Now, I’m not sure how prevalent this prejudice
is in America today—it wasn’t something
I ever heard growing up.
But when you recognize that in the early 20th
century (when that stigma was quite strong)
up to 40% of people in certain parts of that
region had hookworm, that stereotype, while
deeply unjust, starts to make a bit of sense.
It’s no wonder that workers were weak and
children had trouble in school.
So, why did so many Southerners have hookworm?
Well, both the climate, and the sandy soil
of some parts of the South were ideal for
the parasite’s lifecycle.
But on top of that, it largely affected poor
communities where kids may have run around
without shoes, and effective sanitation and
plumbing were not common.
It was one of a few diseases in the American
South that thrived because of widespread poverty,
and likely also perpetuated that poverty.
In the early 1900s there was a huge campaign
to eradicate the disease and educate people
about the parasite.
It’s totally treatable with medications,
but preventing reinfection requires some pretty
fundamental lifestyle changes.
It ended up taking decades to get it under
control, and today very few people in the
US actually get hookworm.
Many other places in the world, however, are
not so lucky.
Right now, according to the CDC, up to 740
million people are infected with hookworm.
It’s just one of many neglected diseases
that sap people’s vitality worldwide, and
may trap them in poverty.
And if that’s not gross, I don’t know
what is.
Ew.
This video was inspired by Rachel Nuwer’s
excellent article for NOVA Next on hookworms
in the American South.
She goes into way more detail about the history
of the disease, the impact of it on the region,
how it was first identified, the eradication
efforts and how the public responded to them,
and finally, about new approaches to treating
it worldwide today.
She even talks about a potential new vaccine.
Anyway, I’ll include a link to the piece
below.
It’s definitely worth reading.
