THE CESTODES Quick Quiz Flashcards
The cestode morphologic form characterized by a segmented appearance that houses male and female reproductive structures is referred to as a(an):
A. Scolex
B. Proglottid
C. Egg
D. Cyst
B. Proglottid
Characteristics of the cestodes include all the following except:
A. They are hermaphroditic.
B. They generally require intermediate host(s).
C. Their laboratory diagnosis consists of finding larvae in feces.
D. Their anatomic regions include the scolex, neck, and strobila.
C. Their laboratory diagnosis consists of finding larvae in feces.
A persistent cough, localized pain, and liver and lung involvement are associated with an infection with which of the following cestodes?
A. Diphyllobothrium latum
B. Echinococcus granulosus
C. Both A and B
D. Neither A nor B
B. Echinococcus granulosus
Which of the following are key distinguishing factors in differentiating an infection between T. saginata and T. solium?
A. Egg morphology and number of uterine branches in proglottid
B. Presence of hooklets on scolex and egg morphology
C. Presence of hooklets and number of uterine
branches in proglottid
D. Egg morphology and presence of suckers on
scolex
C. Presence of hooklets and number of uterine
branches in proglottid
The primary means of developing an intestinal infection with Taenia spp. is via which of the following?
A. Skin penetration of larvae
B. Ingestion of raw or poorly cooked meat
C. Egg consumption
D. Drinking contaminated water
B. Ingestion of raw or poorly cooked meat
Which is the preferred drug for treating intestinal infection by Taenia spp.?
A. Praziquantel
B. Penicillin
C. Nicolasamide
D. Pentamidine
A. Praziquantel
Which of the following is characteristic of an H. diminuta egg?
A. Spherical, with radial striations
B. Ellipsoid, with terminal polar plugs
C. Oval, with thin shell and polar filaments
D. Oval, with polar thickenings and no filaments
D. Oval, with polar thickenings and no filaments
The infective stage of H. diminuta for humans is which of the following?
A. Rhabditiform larva
B. Cysticeroid larva
C. Embryonated egg
D. Encysted form
B. Cysticeroid larva
Prevention and control measures against H. diminuta include all except which of the following?
A. Vaccination program
B. Effective rodent control
C. Inspection of food prior to consumption
D. Protection of food from rodents
A. Vaccination program
A primary differential feature between an H. nana egg and H. diminuta egg is which of the following?
A. A flattened side for H. diminuta egg
B. A thick shell for H. nana egg
C. Polar filaments in H. nana egg
D. Radial striations in H. diminuta egg
C. Polar filaments in H. nana egg
The characteristic of the life cycle of H. nana that differentiates it from the other cestodes is which of the following?
A. Lack of an intermediate host.
B. Infective larval stage.
C. Need for external environment
D. Larval passage through the lungs
A. Lack of an intermediate host.
Which of the following does not apply to H. nana?
A. Dwarf tapeworm
B. Steatorrhea
C. Proper hygiene and sanitation procedures
D. Praziquantel therapy
B. Steatorrhea
A unique characteristic of Dipylidium caninum is which of the following?
A. Lack of suckers on the scolex
B. Formation of egg packets
C. Proglottid resemblance to Taenia solium
D. Alternation of female and male proglottids
B. Formation of egg packets
A 2-year-old girl and her pet dog were diagnosed with D. caninum infection. This infection was acquired by which of the following?
A. Ingestion of the parasite’s egg
B. Penetration of soil larva
C. Ingestion of a flea
D. Consumption of poorly cooked beef
C. Ingestion of a flea
Prevention and control measures to prevent D. caninum infection include all except which of the following?
A. Treat dog and cat pets to prevent fleas.
B. Warn children against dog and cat licks. C. Deworm dog and cat pets, as needed.
D. Neuter dog and cat pets.
D. Neuter dog and cat pets.
