In Trichinela spiralis, the infective stage is the ___ larva.
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In Strongyloides stercoralis, the infective stage is ___ larva
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The organism is a parasite, has direct life cycle and does not need an intermediate host. The adult lives in the lumen of the small intestine of man and usually only feed on the semi-digested contents of the gut, although there is some evidence that they can bite the intestinal mucous membrane and feed on blood and tissue fluids. Which organism is so described?
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Soil-transmitted helminth (STH) infection is not highly endemic in ___.
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The alimentary canal of nematodes is
A. complete, opening with the mouth and terminating at the anus
B. complete, opening with the lips and terminating at the cloaca
C. incomplete, opening with the mouth and terminating at the anus
D. incomplete, opening with the vulva and terminating at the anus
Answer: A
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Which of the following is a parasite that causes Elephantiasis?
A. Wuchereria bancrofti
B. Trichinella spiralis
C. Dracuncula medinensis
D. Haycocknema perplexum
Answer: A
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The vector for Brugia malayi filariasis are
A. flies from two species of the genus Chrysops.
B. aves
C. bovines
D. mosquito species from the genera Mansonia and Aedes
Answer: D
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The vectors for Loa loa filariasis are
A. two species of flies; Chrysops silacea and C. dimidiata.
B. molluscs
C. spieces
D. mosquito species from the genera Mansonia and Aedes
Answer: A
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It is the third most common round worm of humans. It is distributed worldwide, with infections more frequent in areas with tropical weather and poor sanitation practices, and among children. This infection is endemic in southern United States. Which organism does this refer to?
A. Intestinal parasite
B. Trichuris trichiura
C. Wuchereria bancrofti
D. Trichinella spiralis
Answer: B
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A major difference between Ancylostoma duodenale and Necator americanus is that
A. A. duodenale's vulva is positioned towards the tail region while in N. americanus the vulva is positioned at the anterior region
B. A. duodenale has caudal spine while N. americanus does not have
C. A. duodenale has two pairs of copulatory spicules while N. americanus has one pair
D. A. duodenale has one pair ventral teeth while N. americanus has one pair of ventral cutting plates
Answer: B
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