Hookworms in humans are parasitic worms that infect the intestines, usually after larvae in soil penetrate the skin, most often through bare feet in warm, humid climates. While many infections are mild or even silent, they can cause significant anemia, malnutrition, and complications, especially in children and pregnant people.

What hookworms are

Hookworms are intestinal roundworms (nematodes), mainly Necator americanus and Ancylostoma duodenale, that live attached to the small bowel lining and feed on blood. They are a major cause of soil‑transmitted helminth infections worldwide, particularly in tropical and subtropical regions with poor sanitation.

How people get infected

  • Larvae in contaminated soil penetrate bare skin, often the feet (“ground itch”).
  • They travel via the bloodstream to the lungs, are coughed up, swallowed, and mature into adult worms in the small intestine.
  • Human infection is sustained where people defecate in open environments and where feces contaminate soil.

Symptoms and health effects

  • Early skin phase: itchy, red rash or blisters at the entry site.
  • Lung phase: cough, wheeze, mild fever in heavier infections.
  • Intestinal phase: abdominal pain, diarrhea or constipation, nausea, reduced appetite, and weight loss.
  • Chronic effects: iron‑deficiency anemia and protein deficiency, leading to fatigue, pallor, reduced exercise tolerance, and in severe cases heart failure or edema, especially in children and pregnant women.

Diagnosis and treatment

  • Diagnosis is usually by finding hookworm eggs in a stool sample under a microscope.
  • Standard treatment is a short course of oral anthelmintic drugs such as albendazole or mebendazole; iron supplements and nutrition support are given if anemia is present.
  • In many endemic areas, periodic mass drug administration programs reduce community worm burden and improve child growth and school performance.

Prevention and current context

  • Key prevention steps:
    • Use toilets/latrines and avoid open defecation.
    • Wear shoes in areas where soil may be contaminated.
    • Wash hands and clean vegetables that may contact soil.
    • Improve water, sanitation, and hygiene (WASH) infrastructure.
  • Hookworm remains a significant global health issue in low‑resource tropical regions, but coordinated deworming and WASH programs in the 21st century have reduced prevalence in some countries.

Information gathered from public forums or data available on the internet and portrayed here.