Hookworm causes pathology at three stages of infection (the first two caused by larval hookworms usually seen only in expatriates who receive a primary .
What are the stages of hookworm?
Hookworms are large, multicellular organisms which infect their host as an immature larva by penetrating the skin. They then migrate via the bloodstream to the lungs, break through the alveoli and migrate up the trachea to be swallowed, finally residing in the small intestine as adult worms.
What is the diagnostic stage of hookworm?
Laboratory Diagnosis Microscopic identification of eggs in the stool is the most common method for diagnosing hookworm infection. The recommended procedure is as follows: Collect a stool specimen.
Which is the infective stage of hookworm infection?
Life Cycle (intestinal hookworm infection): The released rhabditiform larvae grow in the feces and/or the soil , and after 5 to 10 days (and two molts) they become filariform (third-stage) larvae that are infective . These infective larvae can survive 3 to 4 weeks in favorable environmental conditions.
What is the feeding stage of hookworm?
Hookworm eggs gain nutrition via the host feces. After penetrating the skin, juveniles attach to blood vessels and begin to feed. The larval stage is free-living where there is independent existence in the soil. They then penetrate the host's skin by the secretion of digestive enzymes that dissolve the skin.
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