Hookworm: Causes and Distribution

Ancylostoma duodenale and Necator americanus

Hookworm disease

Small intestines, mostly in the jejunum

<p>Tropical and subtropical climate</p> Signup and view all the answers

<p>Relatively stout cylindroidal worms, pale pink or greyish white, curved body with the anterior end bent dorsally</p> Signup and view all the answers

<p>Cervical curvature of the anterior end</p> Signup and view all the answers

<p>To attach better to the intestines of their host and make wounds on the intestinal mucosa.</p> Signup and view all the answers

<p>They secrete a potent anticoagulant from their amphidial glands onto the wound.</p> Signup and view all the answers

<p>It is expanded into a copulatory bursa which consists of 3 lobes and helps in reproduction.</p> Signup and view all the answers

<p>Oval shaped, measures 60 μm long × 40μm wide, colorless, and surrounded by a thin, hyaline, translucent egg shell.</p> Signup and view all the answers

<p>About 25,000–30,000 eggs in a day.</p> Signup and view all the answers

<p>L1 to L4, with the L3 stage being the infective form to humans.</p> Signup and view all the answers

<p>In a single host.</p> Signup and view all the answers

<p>Adult worm inhabiting the small intestine of man attach themselves to the mucous membrane by means of their mouth parts.</p> Signup and view all the answers

<p>The L3 stage larva, also known as the filariform larva.</p> Signup and view all the answers

<p>No, they are not infective for humans when freshly passed in feces.</p> Signup and view all the answers