Feeds

How much damage does a tapeworm do to the human body?

Less than you'd think

5 things you didn’t know about cloud backup

Also in this week's column:

How much damage does a tapeworm do to the human body?

Asked by George Gomez of Concord, California, USA

Tapeworms produce surprisingly few physical problems for the human body in infected individuals. But it is still to be avoided.

In The Odd Body 3 (2007), it is pointed out that the subject of tapeworms is an often-asked Odd Body Question even though tapeworm infestation is less of a problem in modern industrial societies as the quality of our food is higher. Thank the inventor of the refrigerator for much of this.

Tapeworms come into the body via contaminated food. Many organisms live on and in the human body. A tapeworm can easily survive and thrive indefinitely inside us. A tapeworm in a human can range in length from 1/250 of an inch (.0063 cm) to an incredible 50 feet (15.23 meters)!

Tapeworms have no digestive tract so they must eat food already digested by another animal. That is precisely what they do as a parasite inside our intestines. Tapeworms absorb nutrients directly across their skin (cuticle). They also reproduce inside us. There are many species of tapeworms, not all can infest humans.

Tapeworms are simple in design, but ruthless in action. They consist of two organs. The first organ (scolex) anchors the beastie to the wall of the intestine with suckers and hooks. The second organ (proglottid) is really a series of organs that grow out from the scolex with each having full reproductive capability. Proglottids form a chain of varying length. The last segment of the chain eventually breaks off and is passed out with feces.

Tapeworms resist being destroyed by the body's immune system or digestive juices. Tapeworms cause health problems around the world and can even kill since they rob us of nutrients, block our intestines, and take up space in organs that stop them from functioning normally. A tapeworm cyst can settle in the brain, eye, liver, and elsewhere.

Although little is known about the origins of tapeworms in humans, it is well known that some tapeworms live in both animals and humans. Some tapeworms have such a complex life that they are required to live first in an herbivore (such as a cow) and then in a carnivore (such as a human) where it only then can reproduce [Source: Arnold, J. (2001) Scientific sleuths track the origins of tapeworms in humans. ARS U.S. Department of Agriculture, 23 October, p. 1.]

Stephen Juan, Ph.D. is an anthropologist at the University of Sydney. Email your Odd Body questions to s.juan@edfac.usyd.edu.au

Build a business case: developing custom apps

More from The Register

next story
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
TRIANGULAR orbits will help Rosetta to get up close with Comet 67P
Probe will be just 10km from Space Duck in October
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
ANU boffins demo 'tractor beam' in water
The current state of the art, apparently
China to test recoverable moon orbiter
I'll have some rocks and a moon cheese pizza please, home delivery
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
Why your mum was WRONG about whiffy tattooed people
They're a future source of RENEWABLE ENERGY
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.