LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

VE 44

M.Sc. DEGREE EXAMINATION – ZOOLOGY

THIRD SEMESTER – April 2009

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)

1. Silver Nitrate is associated with the treatment of
2. Gonorrhoea b. Syphilis c. TB                           d. Cholera
3. Hyaluronidase is otherwise known as
4. Lecithinase b. Coagulase                c. Hemolysis                d. Spreading factor
5. Streptomyces noursei is the source for the antibiotic:
6. Streptomycin b. Pencillin      c. Nystatin       d. Bacitracin
7. Match A) BCG B) Mycoses    C) Trophozoite     D) Chancre with
8. i) Histoplasma ii) Mycobacterium     iii) Syphilis     iv) Entamoeba
9. a) A-ii, B-i, C-iv,   D) iii           b) A-ii,   B-iv,   C-iii,    D) i
10. c) A-ii, B-iii, C-iv,   D) iii           d) A-ii,   B-i,     C-iv,    D) iii
11. Statement A: Dermatophytoses are fungal infections of skin.

      Statement B: They are commonly called as ringworm infection.

1. Statement Ais correct, but B is incorrect
2. Statement A is incorrect, but B is correct
3. 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            (5 x 1 = 5)

6. Bright field microscope is used to view spirochaetes.
7. Resident flora usually occurs as commensals.
8. Interferons are antiviral proteins, found in blood.
9. DPT refers to Diphtheria Polio Tetanus.
10. The causal organism of meningitis is Streptococcus.

 

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.

 

 

 

1. Answer all, each in about 50 words      (5 x 1 = 5)
2. What is pasteurization?
3. Define the term: Communicability.
4. Name any two characteristics of antibiotics.
5. Write down the causal organism and one symptom of Tuberculosis.
6. 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:
27. a) HEPA b) NMF           c) CFT             d) HBV
28. e) VZA f) HTST           g) MNL           h) IFT
29. Write two points about each of the following
30. a) Portal of entry b) Chemotherapy     c) Tertiary Syphilis        d) Trichomoniasis
31. 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

1. b) Write notes on
2. i) Tissue affinity and interhost survival period (10)    ii) Phagocytosis (10)
3. a) Give a detailed account of HIV/AIDS.

or

1. b) Comment on:
2. i) Morphology, staining, cultural and antigenic characteristics of Vibrio cholera (10)
3. ii) Outline of immunity (10)

 

 

 

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