1.
The three main groups of helminth important to human are ________, _________ and ___________.
Correct Answer
B. Cestoda, Digenea and Nematoda
Explanation
Helminth is a term for all groups parasitic worms. The three main groups important to human are: The tapeworms (Cestoda), the flukes (Trematoda or Digenea) and the roundworms (Nematoda).
2.
One of these statements is true regarding Cestode (tapeworms):
Correct Answer
D. long flat ribbon-like bodies with a single anterior holdfast organ (scolex)
Explanation
Nematodes (roundworm) are long thin unsegmented tube-like bodies with anterior mouths and longitudinal digestive tracts.
Trematodes (flukes) are small flat leaf-like bodies.
all Cestodes (tapeworms) are hermaphroditic and are long flat ribbon-like bodies with a single anterior holdfast organ (scolex)
3.
Nematodes (roundworms) have a fluid-filled internal body cavity called ___________ which acts as a hydrostatic skeleton providing rigidity.
Correct Answer
C. Pseudocoelum
Explanation
Cestodes and Trematoda do not have a body cavity (acoelomate)
4.
Helminths infection can occur by one of these process:
Correct Answer
D. All of the above.
Explanation
Blood sucking insects can also infect human with helminths.
5.
Most often laboratory test perform for helminths infection is __________
Correct Answer
B. Examination of the stool for ova and parasites (O&P)
Explanation
The most common laboratory test performed for helminths infection is the examination of the stool for ova and parasites (O&P). This test involves analyzing a stool sample under a microscope to look for the presence of eggs or larvae of helminths, which are parasitic worms. This test helps in diagnosing various types of helminths infections, such as roundworms, tapeworms, and hookworms. By identifying the presence of these parasites, appropriate treatment can be initiated to eliminate the infection.
6.
In Helminth's life cycle, a definitive host is one in which the ____________ occurs or the _________ is present.
Correct Answer
A. Sexual cycle; adult
Explanation
In Helminth's life cycle, a definitive host is one in which the sexual cycle occurs or the adult is present.
In Helminth's life cycle, an intermediate host is one in which the asexual cycle occurs or the larva is present.
7.
One of the folllowing is true about Taeniasis?
Correct Answer
D. Taeniasis refers specifically to infection with the adult tapeworm in the gut of the definitive host.
Explanation
Taeniasis is asymptomatic, and only occurs in humans. Taeniasis refers specifically to infection with the adult tapeworm in the gut of the definitive host.
8.
Human acquired schistosomiasis by ________
Correct Answer
C. Penetration of skin by larva stages from snails
Explanation
Schistosomiasis is caused by schistomes and are acquired by penetration of skin by larva stages from snails.
Three types of schistomes are:
Schistosoma haematobium (infects blood vessel of bladder)
Schistosoma japonicum (infects blood vessel of intestine)
Schistosoma mansoni. (infects blood vessel of intestine)
9.
Trichinella does not require intermediate hosts.
Correct Answer
A. True
Explanation
It is capable of completing its life cycle in a single species of either its primary hosts, such as rodents, pigs, or wild games, or incidental hosts, such as humans.
10.
Platyhelminths are the cestoda and the nematoda.
Correct Answer
B. False
Explanation
Platyhelminths are the Cestoda (the tapeworms) and Trematoda (the flukes). The Nematodes are the roundworms (Nematoda).