Chapter 2. Nematoda
1. A clinical sign that may suggest the presence of a filarial nematode infection is:
a. Diarrhea
b. Eosinophilia
c. Jaundice
d. Microcytic anemia
2. The nematode infection that may become more
...
Chapter 2. Nematoda
1. A clinical sign that may suggest the presence of a filarial nematode infection is:
a. Diarrhea
b. Eosinophilia
c. Jaundice
d. Microcytic anemia
2. The nematode infection that may become more severe through ingestion of infective eggs,
especially in infected infants, is:
a. Ancylostoma duodenale
b. Enterobius vermicularis
c. Strongyloides stercoralis
d. Trichinella spiralis
3. In the Ascaris lumbricoides life cycle, after eggs are ingested, the next stage in the life cycle
that must occur before a mature adult can live in the host’s intestine is called the:
a. Diagnostic stage
b. Infective stage
c. Liver-lung migration
d. Method of infection
Answer Key for Chapter 2. Nematoda
1. A clinical sign that may suggest the presence of a filarial nematode infection is:
a. Diarrhea
b. Eosinophilia
c. Jaundice
d. Microcytic anemia
ANS: B
RATIONALE: Migrating nematodes, especially filarial parasites, are usually associated with
blood or tissue eosinophilia.
KEY: Nematoda: life cycle/clinical symptoms | Cognitive level: correlation
2. The nematode infection that may become more severe through ingestion of infective eggs,
especially in infected infants, is:
a. Ancylostoma duodenale
b. Enterobius vermicularis
c. Strongyloides stercoralis
d. Trichinella spiralis
ANS: B
RATIONALE: Enterobius vermicularis infections become more severe due to the pruritus
caused by new eggs released by dying females, which leads to autoreinfection through ingestion
of these new eggs.
KEY: Nematoda: life cycle | Cognitive level: correlation
3. In the Ascaris lumbricoides life cycle, after eggs are ingested, the next stage in the life cycle
that must occur before a mature adult can live in the host’s intestine is called the:
a. Diagnostic stage
b. Infective stage
c. Liver-lung migration
d. Method of infection
ANS: C
RATIONALE: The liver-lung migration phase of the Ascaris lumbricoides life cycle occurs as
the larva form migrates from the intestine to the lungs before returning to the intestine to become
a mature adult worm. See life cycle, p. 17.
[Show More]
