Swinburne TAFE

 

 

Medical Microbiology II

 

 

 

Semester 2, Term 4, 2007-11-06

 

Theory Test 4

 

 

 

Name:……………………………………………

 

 

Student Number:……………………………….

 

 

Time Allowed:  1 hour 30 minutes

 

 

Results and answers to questions must be clearly.

Responses not clearly written may be marked incorrect.

 

A mark of 50% is required to pass this test.

 

 

 

Marks:                    /50                      ……%                       PASS / FAIL

 

 

 

 

Questions

 

 

1.     What are the factors called that enable bacteria to cause disease?

 

(1)

2.     What must occur for a bacterium to establish an infection

 

 

(2)

3.     Do all infections cause disease? Explain.

 

 

 

(2)

4.     Can an infection be beneficial to the host? If so. How?

 

(2)

5.     What are two virulence factors that aid invasiveness?

 

 

(2)

6.     What are two effects of endotoxin?

 

 

(2)

7.     What is common about all  bacteria that produce endotoxin

 

(1)

8.     Identify three types of exotoxin

 

 

(3)

9.     How can antigens cause disease symptoms

 

 

(2)

10.  Identify three virulence factors that assist invasiveness.

 

 

 

 

 

 

 

 

11    Name two  genera of bacteria can cause both sexually transmitted disease (STD) as well as eye infections

 

 

(2)

 

 

12.    Complete the following table:

 

Organism

Disease

Organism type

Site of infection

••Chlamydia trachomatis.

 

trachoma

Bacteria

conjuctiva

••Salmonella.

 

 

 

 

•

cellulitis

 

 

 

SSSS

 

 

•

Conjental cateracts

 

 

•

 

bactria

uretha

•

scabies

 

 

•• Bacteroides fragilis

. 

 

 

 

blood:

 

• Clostridium perfringens

 

 

wounds

Clostridium difficile:

 

 

 

 

 

                                                                                                (12)

13.  Identify two bacteria that can cause otitis media

 

                                                                                                (2)

14.  Identify two bacteria that can cause otitis externna

 

                                                                                                (2)

15. Which of the above (13 or 14) is sometime called “swimmers ear”

 

                                                                                                (1)

16. Which of the above (13 or 14) may involve the tympanic membrane

 

                                                                                                (1)

 

 

 

17 What is the most likely route for bacteria to enter the middle ear?

 

                                                                                                (2)

 

18    Why do infants get more middle ear infections than adults?

 

(2)

19. What organism is likely to cause conjunctivitis in the new borne?

 

                                                                                                (2)

20. What part of the eye is damaged with keratitis?

 

                                                                                                (1)

21.  What are two vectors can cause damage resulting in keratitis?

 

                                                                                                (2)

22.  What is a common cause of endophthalmitis?

                                                                                                (1)

 

23. Keratitis can sometime be caused by dead bacteria. What kind of toxin might cause this kind of inflammation?

 

                                                                                                (1)

24 How can lipopolysaccharide (LPS) be tested for?

 

                                                                                                (1)

 

25.    What is the meant by the term “pathogenicity”?

 

 

26.    What are 4 major virulence factors?

(4)

 

27.     What is the most common cause of UTIs?

 

 

28.     What is the normal success on bacterial goups in an infected wound?

 

29 Give an example of symbiosis between groups of bacteria infecting a wound.

 

In  which part of the body are the following bacteria found as normal flora?

 

Propionibacterium acnes

 

Clostridium perfringens

 

Bacteroides fragilis

 

Staphylococcus areus

 

 

 

 

 

 

(1)