- Also called:
- ancylostomiasis or uncinariasis
hookworm disease
-
What is hookworm disease?
Hookworm disease is a parasitic infestation caused by blood-sucking worms in the small intestine, often leading to anemia. Necator americanus and Ancylostoma duodenale are common culprits, with larvae penetrating human skin, typically through bare feet.
The larvae travel through the bloodstream to the lungs and then to the small intestine, where they mature and feed on blood. Heavy infestations can cause symptoms such as fatigue, abdominal pain, and appetite changes. Diagnosis involves identifying hookworm eggs in feces.
Treatment includes medications to eliminate the worms and iron supplements to combat anemia. Prevention focuses on proper sanitation and wearing shoes to avoid contact with contaminated soil.
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How do people get hookworm disease?
Hookworm disease is a parasitic illness caused by hookworms that reside in the small intestine and suck blood, sometimes resulting in anemia.
People get hookworm disease through contact with soil contaminated by hookworm eggs. The eggs hatch into larvae, which can penetrate human skin, typically through the feet. The larvae then travel through the bloodstream to the lungs and up the respiratory tract to the mouth, where they are swallowed. Once in the small intestine, they mature into adult worms and begin a new reproductive cycle.
Walking barefoot on contaminated soil, poor sanitation, and improper disposal of human waste contribute to the spread of hookworm disease.
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What are the main symptoms of hookworm disease?
Hookworm disease symptoms start with ground itch, an irritation from larvae penetrating the skin, often between toes. As the larvae move through the lungs, they can cause coughing and fever. Mature worms in the intestine feed on blood, which can lead to anemia. Heavy infestations can result in pallor, fluid retention, constipation, diarrhea, abdominal tenderness, and increased appetite for unusual substances. Additional symptoms include delayed puberty, stunted growth, fatigue, apathy, and dullness.
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How do hookworms affect the body?
Hookworm disease is a parasitic infestation caused by bloodsucking worms in the small intestine that can result in secondary anemia. Hookworm larvae typically penetrate the skin, often through the feet, and migrate through the bloodstream to the lungs. They then travel up the respiratory tract to the mouth, are swallowed, and eventually reach the small intestine, where they mature and start a new reproductive cycle.
Adult hookworms attach to the intestinal lining and feed on blood, which can lead to anemia. Heavy infestations can cause symptoms such as pallor, fatigue, abdominal tenderness, and appetite changes.
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How can hookworm disease be prevented?
Hookworm disease, a parasitic infestation caused by bloodsucking worms in the small intestine, can be prevented by ensuring proper disposal of human excreta. Since hookworm infections are typically transmitted via contact with contaminated soil, wearing shoes can help prevent the larvae from penetrating the skin. Other measures include health education promoting sanitation principles, establishing local health services, and continuous observation to prevent conditions conducive to infection. Periodic mass treatment of populations has been used in some hookworm control programs.
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What treatments are available for hookworm disease?
Hookworm disease, a parasitic infestation caused by bloodsucking worms in the small intestine, leads to anemia. Treatment includes removing the worms and reducing anemia. For severe cases, a blood transfusion, dietary adjustments, and iron therapy may be needed before administering a vermifuge.
Several vermifuges can be used. Tetrachlorethylene is a safe drug that can remove 90% or more of the worms with a single treatment. Bephenium hydroxynaphthoate is effective against Ancylostoma. Other drugs, like albendazole and mebendazole, interfere with glucose uptake, which impacts energy production in the worms. Iron supplements and a high-protein diet can also speed recovery.
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hookworm disease, parasitic infestation of humans, dogs, or cats caused by bloodsucking worms living in the small intestine—sometimes associated with secondary anemia.
Several species of hookworms can cause the disease. Necator americanus, which ranges in size from 5 to 11 mm (0.2 to 0.4 inch), is responsible for about 90 percent of human hookworm infections that occur in tropical and subtropical regions of the world. Ancylostoma duodenale, 8 to 13 mm long, is found on all continents but is most prevalent in warm regions. A. braziliense, 8 to 11 mm long, is normally parasitic in dogs and cats; humans, however, are sometimes infected by this species in the southern United States, South America, and Asia. A. ceylanicum, normally parasitic in dogs, is sometimes found in humans in South America and Asia. A. duodenale possesses four hooklike teeth in its adult stage, and N. americanus has plates in its mouth rather than teeth.
Species of hookworms have similar life cycles. The adult worm attaches itself to the mucosal tissue lining the small intestine, where the female may produce several thousands eggs a day, which are passed in the feces. If the fecal matter reaches suitable soil, the eggs are hatched, and the infective threadlike larvae may penetrate human skin, usually that of the foot, by way of the sweat glands and hair follicles. They then invade the lymph and blood vessels, reach the lungs, and pass up the respiratory tree to reach the mouth, where they are swallowed and sent to the small intestine; there they mature and start a new reproductive cycle. The intestinal parasites are reputedly long-lived, with a lifetime that may span some 10 years.
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The symptoms of hookworm disease ordinarily begin with ground itch, an itchy skin irritation caused by the larvae when they penetrate the skin and marked by papules and vesicles that are often located between the toes. In passing through the lungs, the larvae may produce coughing and fever. In the intestine, the mature worm sustains its life by bloodsucking, and persistent feeding by many worms over many years results in secondary anemia. In heavy infestations (which may involve more than 500 larvae), the general symptoms include pallor of the skin and mucous membranes, fluid retention in the face and extremities, constipation alternating with diarrhea, abdominal tenderness, increased appetite for bulky or strange substances (e.g., clay), delayed puberty and stunted growth, fatigue, dullness, and apathy.
Hookworm infestation tends to be constantly widespread in tropical and subtropical regions of the world; moisture, warmth, loose soil, and absence of shoes are the chief factors responsible for infection. One single oral dose of tetrachlorethylene on an empty stomach will remove about 90 percent of the Necator. Bephenium hydroxynaphthoate is especially effective against Ancylostoma. Iron supplements and a diet high in protein will speed recovery. Immediate prognosis is good, but the likelihood of reinfection constitutes a major health problem. Periodic mass treatment of the population has been used in some hookworm control programs. The prevention of hookworm disease consists of ensuring the sanitary disposal of human excreta.