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Ascaris lumbricoides is a large parasitic roundworm of the genus Ascaris. It is the most common parasitic worm in humans. [1] An estimated 807 million–1.2 billion people are infected with Ascaris lumbricoides worldwide. [2] People living in tropical and subtropical countries are at greater risk of infection.
The diagnosis is usually incidental when the host passes a worm in the stool or vomit. The eggs can be seen in a smear of fresh feces examined on a glass slide under a microscope and there are various techniques to concentrate them first or increase their visibility, such as the ether sedimentation method or the Kato technique. The eggs have a ...
A. lumbricoides was originally called Lumbricus teres and was first described in detail by Edward Tyson in 1683. [8] The genus Ascaris was originally described as the genus for Ascaris lumbricoides by Carl Linnaeus in 1758. [9] The morphologically similar Ascaris suum was described from pigs by Johann August Ephraim Goeze in 1782. [9]
Hookworms attached to the intestinal mucosa Two pinworms Image showing life cycle inside and outside of the human body of one fairly typical and well described helminth: Ascaris lumbricoides. Helminths are a group of organisms which share a similar form but are not necessarily evolutionarily related. The term "helminth" is an artificial term.
Female Ascaris lumbricoides. Ascariasis of STH is caused by the large roundworm A. lumbricoides. It is estimated to be the most widespread STH, affecting approximately 1 billion people. The victims constitute about half of the populations in tropical and subtropical areas. Most conditions are mild and often show little or no symptoms. Heavy ...
By Keith Morrison Taking the phrase of "putting it under the microscope" quite literally, the Nikon Small World contest recently announced its winners for 2014. Now in its 40th year, the contest ...
Kodak Starmeter and Starmite Cameras, $74.37. In today's dollars: $762.72 These similar cameras had molded plastic bodies and were touted for their portability.Both used 127 film rolls, which ...
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