NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JULY 2018 EXAMINATION

COURSE CODE:      BIO 310

COURSE TITLE:     PROTOZOOLOGY

TIME ALLOWED: 2 HOURS

CREDIT HOUR--- 2

INSTRUCTION: ANSWER QUESTION 1 (COMPULSORY) AND ANY OTHER THREE QUESTIONS

Q1a. Define the following terms:

1. Host (1mark);
2. Definitive host (1mark);
3. Intermediate host (1mark);
4. Reservoir host (1mark);
5. Vector (1mark).

b. Outline five general characteristics of the phylum Apicomplexa(10marks)

c. Mention two apicomplexan parasites that are of medical importance (4marks)

d. Mention six organelles found in the structure of protozoans (6marks)

Q2a. Name five species of Entamoeba that infect man and their location in the body of man or of other vertebrates (5marks)

b. i. State the major parasite responsible for amebic dysentery; (1mark)

ii. What are the acute symptoms of  amoebic dysentery? (1mark)

iii. What are the treatments for amoebic dysentery? (1mark)

c. Name the disease caused  by Giardia; its symptoms; pathology and treatment (7marks)

Q3a. Briefly, describe the epidemiology, morphology and the life cycle of Trichomonas vaginalis. (9marks)

b. Mention the disease caused by Trichomonas vaginalis. (2marks)

c. What are the symptoms and treatments of the disease caused by Trichomonas vaginalis? (4marks)

Q4a. Name five blood protozoan  that are of major biological/medical significance (5marks).

b. Describe the morphology and life cycle of a trypanosome (10marks). Put diagrams where necessary.

Q5a. Describe the characteristics of the following Plasmodium species:

i. Plasmodium falciparum (5marks)

ii. Plasmodium vivax (5marks)

b. State five characteristics of Mosquito that makes it an efficient vector of the human malaria parasite (5marks)