hookworm

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hookworm,

any of a number of bloodsucking nematodes in the phylum NematodaNematoda
, phylum consisting of about 12,000 known species, and many more predicted species, of worms (commonly known as roundworms or threadworms). Nematodes live in the soil and other terrestrial habitats as well as in freshwater and marine environments; some live on the deep
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, order Strongiloidae that live as parasites in humans and other mammals and attach themselves to the host's intestines by means of hooks. Hookworm infection in humans is caused by infestation with Ancylostoma duodenale (the European species) or with Necator americanus (the American species). It is found in tropical and subtropical climates, especially where the inhabitants do not wear shoes or stockings and where the soil is contaminated by human excrement. The larva of the hookworm, living in moist soil or mud, easily penetrates the exposed skin, usually the sole of the foot, and is then carried by the blood to the lungs. An early sign of hookworm infestation is a dermatitis at the site of entry, known as ground itch. As the larva passes through the lungs, it causes episodes of coughing with bloody sputum. Raised with the mucus into the mouth, the larva is then swallowed. It may also be swallowed with polluted drinking water or with unclean vegetables eaten raw. By means of its hooks the larva attaches itself to the upper portion of the small intestine, where it nourishes itself on the blood of its host. The larva matures and the female produces eggs, as many as 30,000 per day, that are passed from the intestine with the feces, usually to contaminate the soil still further. The drain on the blood of the host results in anemia. This, together with the resulting abdominal pain and diarrhea, causes general debility. Hookworm is treated with drugs, notably tetrachloroethylene, that loosen and destroy the parasite, as well as with specifics for the anemia and abdominal symptoms. Incidence of this disease, which was once seriously prevalent, has been much reduced by improved sanitation and the wearing of shoes.
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hookworm

[′hu̇k‚wərm]
(invertebrate zoology)
The common name for parasitic roundworms composing the family Ancylostomidae.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

hookworm

any parasitic blood-sucking nematode worm of the family Ancylostomatidae, esp Ancylostoma duodenale or Necator americanus, both of which cause disease. They have hooked mouthparts and enter their hosts by boring through the skin
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Molecular identification of hookworms in stray and shelter dogs from Guangzhou City, China using ITS sequences.
ceylanicum (n = 24) hookworm monoinfections; participants co-infected with both hookworms or other soil-transmitted helminths (i.e., S.
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She also said that at first they thought it was sand flea bites, however, they later discovered that their legs were, in fact, infected with hookworms.
Moreover, soil transmitted helminthiasis like Ascaris lumbricoides and hookworm can undergo heart to lung migration during their life cycle and this result in symptoms that maybe confused with PTB [9,10].
It is caused by migration of hookworm larvae into the human skin.
Additionally, while stool DR remains a commonly used diagnostic modality for hookworm infection, incidence of false negatives on a single stool sample is high, especially in early infection, and thus a negative stool DR cannot be relied on completely.3,9 Furthermore, higher summer temperatures, moisture and soil characteristics10 in most of Punjab and neighboring agricultural areas of the country provide favorable weather for survival and transmission of hookworms.
The hazards targeted and identified included Ascaris lumbricoides, hookworms, Taenia, E.
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A 2014 study estimated nearly 439 million people worldwide were infected with hookworms, small creatures that can live for years in the bodies of hosts.
Triple Wormer offers full protection for dogs and puppies from seven strains roundworms, hookworms and tapeworms.