Medical Parasitology 7th Edition Leventhal Test Bank Chapter 1. Introduction
- In a general nematode parasite’s life cycle, the host may ingest a fertile egg. This stage of the
life cycle is referred to as the:
- Definitive host phase
- Diagnostic stage
- Infective stage
- Method of infection
2. A parasite that lives inside a host is referred to as a(n):
- Accidental parasite
- Ectoparasite
- Endoparasite
- Facultative parasite
3. Zoonosis is a term used to describe humans’ relationship with a(n):
- Accidental parasite
- Ectoparasite
- Endoparasite
- Facultative parasite
- An animal that harbors a parasite that can also infect humans is referred to as a(n):
- Definitive host
- Intermediate host
- Reservoir host
- Transport host
- The host in which the parasite reaches sexual or reproductive maturity is referred to as a(n):
- Definitive host
- Intermediate host 1 / 4
- Reservoir host
- Transport host
Answer Key for Chapter 1. Introduction
- In a general nematode parasite’s life cycle, the host may ingest a fertile egg. This stage of the
life cycle is referred to as the:
- Definitive host phase
- Diagnostic stage
- Infective stage
- Method of infection
ANS: C
RATIONALE: This is the stage of the life cycle at which the parasite is capable of entering and developing within the host. It is a required part of the life cycle of that parasite.KEY: Introduction: parasite definitions/life cycles | Cognitive level: recall
2. A parasite that lives inside a host is referred to as a(n):
- Accidental parasite
- Ectoparasite
- Endoparasite
- Facultative parasite
- / 4
ANS: C
RATIONALE: Endoparasites live inside the host. Ectoparasites live on the outside of the host.Facultative parasites can live as well outside the host as inside the host; host infection usually occurs accidentally. Other accidental parasites may include parasites that usually infect other animals.KEY: Introduction: parasite definitions/life cycles | Cognitive level: recall
3. Zoonosis is a term used to describe humans’ relationship with a(n):
- Accidental parasite
- Ectoparasite
- Endoparasite
- Facultative parasite
ANS: A
RATIONALE: Zoonosis is an accidental infection with a parasite that usually parasitizes animals. Endoparasites live inside the host. Ectoparasites live outside the host. Facultative parasites can live as well outside the host as inside the host; host infection usually occurs accidentally.KEY: Introduction: parasite definitions/life cycles | Cognitive level: recall
- An animal that harbors a parasite that can also infect humans is referred to as a(n):
- Definitive host
- Intermediate host
- Reservoir host
- Transport host
ANS: C
RATIONALE: Reservoir hosts harbor parasites that are also infective for humans. Infections occur when humans encounter infected animals or infective forms related to that parasite’s life cycle.KEY: Introduction: parasite-host relationships | Cognitive level: recall
- The host in which the parasiteTreEaSchTeBs AseNxKuaSl EorLrLepEroRd.uCctOivMe maturity is referred to as a(n):
- Definitive host
- Intermediate host 3 / 4
- Reservoir host
- Transport host
ANS: A
RATIONALE: The definitive host harbors the parasite in its complete form, which promotes continuance of the parasite’s life cycle. A reservoir host also serves as a definitive host.KEY: Introduction: parasite-host relationships | Cognitive level: recall
- / 4