Medical Parasitology Examination
Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Medical parasitology is the study of:
A. Bacteria causing disease
B. Viruses infecting humans
C. Parasites that affect humans
D. Fungi causing infections
Answer: C. Parasites that affect humans
Rationale: Medical parasitology focuses on organisms that live in or on humans
and cause disease.
2. A parasite is an organism that:
A. Produces its own food
B. Lives in or on another organism and obtains benefits
C. Cannot reproduce
D. Always kills its host
Answer: B. Lives in or on another organism and obtains benefits
Rationale: Parasites depend on hosts for nutrients, shelter, or reproduction.
3. The organism that harbors a parasite is called the:
A. Vector
B. Reservoir
,C. Host
D. Intermediate organism
Answer: C. Host
Rationale: A host provides resources required for parasite survival.
4. A parasite that lives inside the host is called an:
A. Ectoparasite
B. Endoparasite
C. Vector
D. Predator
Answer: B. Endoparasite
Rationale: Endoparasites inhabit internal tissues, organs, or body fluids.
5. A parasite that lives on the surface of a host is called a:
A. Protozoan
B. Endoparasite
C. Ectoparasite
D. Helminth
Answer: C. Ectoparasite
Rationale: Ectoparasites live externally on the host.
6. Protozoa are:
A. Multicellular worms
B. Arthropods
C. Single-celled eukaryotic organisms
D. Viruses
Answer: C. Single-celled eukaryotic organisms
,Rationale: Protozoa are unicellular organisms with a true nucleus.
7. Helminths are:
A. Bacteria
B. Viruses
C. Parasitic worms
D. Fungi
Answer: C. Parasitic worms
Rationale: Helminths include parasitic nematodes, cestodes, and trematodes.
8. The three major groups of helminths are:
A. Protozoa, fungi, bacteria
B. Nematodes, cestodes, and trematodes
C. Viruses, bacteria, fungi
D. Arthropods, protozoa, algae
Answer: B. Nematodes, cestodes, and trematodes
Rationale: These are the major medically important worm groups.
9. Nematodes are also known as:
A. Tapeworms
B. Flukes
C. Roundworms
D. Protozoa
Answer: C. Roundworms
Rationale: Nematodes are cylindrical worms commonly called roundworms.
10. Cestodes are also known as:
, A. Roundworms
B. Flukes
C. Tapeworms
D. Protozoa
Answer: C. Tapeworms
Rationale: Cestodes are flat, segmented tapeworms.
11. Trematodes are also known as:
A. Roundworms
B. Tapeworms
C. Flukes
D. Mites
Answer: C. Flukes
Rationale: Trematodes are leaf-shaped parasitic flatworms.
12. The definitive host is the host where parasites:
A. Are destroyed
B. Reach sexual maturity
C. Enter through the skin
D. Are transmitted by insects
Answer: B. Reach sexual maturity
Rationale: Adult sexual reproduction occurs in the definitive host.
13. The intermediate host usually contains:
A. Adult parasites only
B. Immature or larval stages
C. No parasites
D. Bacterial infections
Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Medical parasitology is the study of:
A. Bacteria causing disease
B. Viruses infecting humans
C. Parasites that affect humans
D. Fungi causing infections
Answer: C. Parasites that affect humans
Rationale: Medical parasitology focuses on organisms that live in or on humans
and cause disease.
2. A parasite is an organism that:
A. Produces its own food
B. Lives in or on another organism and obtains benefits
C. Cannot reproduce
D. Always kills its host
Answer: B. Lives in or on another organism and obtains benefits
Rationale: Parasites depend on hosts for nutrients, shelter, or reproduction.
3. The organism that harbors a parasite is called the:
A. Vector
B. Reservoir
,C. Host
D. Intermediate organism
Answer: C. Host
Rationale: A host provides resources required for parasite survival.
4. A parasite that lives inside the host is called an:
A. Ectoparasite
B. Endoparasite
C. Vector
D. Predator
Answer: B. Endoparasite
Rationale: Endoparasites inhabit internal tissues, organs, or body fluids.
5. A parasite that lives on the surface of a host is called a:
A. Protozoan
B. Endoparasite
C. Ectoparasite
D. Helminth
Answer: C. Ectoparasite
Rationale: Ectoparasites live externally on the host.
6. Protozoa are:
A. Multicellular worms
B. Arthropods
C. Single-celled eukaryotic organisms
D. Viruses
Answer: C. Single-celled eukaryotic organisms
,Rationale: Protozoa are unicellular organisms with a true nucleus.
7. Helminths are:
A. Bacteria
B. Viruses
C. Parasitic worms
D. Fungi
Answer: C. Parasitic worms
Rationale: Helminths include parasitic nematodes, cestodes, and trematodes.
8. The three major groups of helminths are:
A. Protozoa, fungi, bacteria
B. Nematodes, cestodes, and trematodes
C. Viruses, bacteria, fungi
D. Arthropods, protozoa, algae
Answer: B. Nematodes, cestodes, and trematodes
Rationale: These are the major medically important worm groups.
9. Nematodes are also known as:
A. Tapeworms
B. Flukes
C. Roundworms
D. Protozoa
Answer: C. Roundworms
Rationale: Nematodes are cylindrical worms commonly called roundworms.
10. Cestodes are also known as:
, A. Roundworms
B. Flukes
C. Tapeworms
D. Protozoa
Answer: C. Tapeworms
Rationale: Cestodes are flat, segmented tapeworms.
11. Trematodes are also known as:
A. Roundworms
B. Tapeworms
C. Flukes
D. Mites
Answer: C. Flukes
Rationale: Trematodes are leaf-shaped parasitic flatworms.
12. The definitive host is the host where parasites:
A. Are destroyed
B. Reach sexual maturity
C. Enter through the skin
D. Are transmitted by insects
Answer: B. Reach sexual maturity
Rationale: Adult sexual reproduction occurs in the definitive host.
13. The intermediate host usually contains:
A. Adult parasites only
B. Immature or larval stages
C. No parasites
D. Bacterial infections
