LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
THIRD SEMESTER – April 2009
VE 44
BT 3901 - MEDICAL MICROBIOLOGY
Date & Time: 29/04/2009 / 9:00 - 12:00 Dept. No.
Max. : 100 Marks
PART A
(20 marks)
Answer All questions
I Choose the Correct Answer
(5 x 1 = 5)
01. Silver Nitrate is associated with the treatment of
a. Gonorrhoea
b. Syphilis
c. TB
d. Cholera
02. Hyaluronidase is otherwise known as
a. Lecithinase
b. Coagulase
c. Hemolysis
d. Spreading factor
03. Streptomyces noursei is the source for the antibiotic:
a. Streptomycin b. Pencillin c. Nystatin
d. Bacitracin
04. Match A) BCG B) Mycoses C) Trophozoite D) Chancre with
i) Histoplasma ii) Mycobacterium iii) Syphilis iv) Entamoeba
a) A-ii, B-i, C-iv, D) iii
b) A-ii, B-iv, C-iii, D) i
c) A-ii, B-iii, C-iv, D) iii
d) A-ii, B-i, C-iv, D) iii
05. Statement A: Dermatophytoses are fungal infections of skin.
Statement B: They are commonly called as ringworm infection.
a) Statement A is correct, but B is incorrect
b) Statement A is incorrect, but B is correct
c) Both A and B are correct
d) Both A and B are incorrect
II State whether the following are True or False. If false, give reason
06. Bright field microscope is used to view spirochaetes.
07. Resident flora usually occurs as commensals.
08. Interferons are antiviral proteins, found in blood.
09. DPT refers to Diphtheria Polio Tetanus.
10. The causal organism of meningitis is Streptococcus.
(5 x 1 = 5)
III. Complete the following
(5 x 1 = 5)
11. _________ sterilization involves exposure to ___________ radiation to control microbes
12. ___________ flora are part of NMF which remain permanently in our body.
13. Widal test is a type of _____________ reaction to diagnose _______________.
14. ___________ __________ stool is the most prominent symptom of Cholera.
15. The causal organism of Typhus____________ is ___________ prowezekii.
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IV. Answer all, each in about 50 words
(5 x 1 = 5)
16. What is pasteurization?
17. Define the term: Communicability.
18. Name any two characteristics of antibiotics.
19. Write down the causal organism and one symptom of Tuberculosis.
20. Mention any two genera of Dermatophytic fungi.
PART B
(5 x 8 = 40)
Answer any five, each within 350 words only. Draw diagrams and flowcharts wherever necessary.
21. Classify pathogenic bacteria based on Gram staining.
22. Distinguish between exotoxins and endotoxins.
23. Write about any two antigen – antibody reactions.
24. Differentiate between Syphilis and Gonorrhoea based on the causal organism,
morphology and symptoms.
25. What are the different types of Anthrax based on site of entry? Add a note on its treatment.
26. Expand the following with a foot notes each:
a) HEPA
b) NMF
c) CFT
d) HBV
e) VZA
f) HTST
g) MNL
h) IFT
27. Write two points about each of the following
a) Portal of entry b) Chemotherapy c) Tertiary Syphilis
d) Trichomoniasis
28. What are transient flora? How do they differ from resident flora, given examples.
PART C
(2 x 20 = 40 marks)
Answer the following, each within 1500 words only. Draw diagrams and flowcharts wherever
necessary.
29. a) Enumerate the characteristics of an ideal chemical agent. (6)
Write about the following used in chemical control: Phenols and Gaseous
chemosterilizers (14)
or
b) Write notes on
i) Tissue affinity and interhost survival period (10) ii) Phagocytosis (10)
30. a) Give a detailed account of HIV/AIDS.
or
b) Comment on:
i) Morphology, staining, cultural and antigenic characteristics of Vibrio cholera (10)
ii) Outline of immunity (10)
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