microbiology

Question 1

what type of bacteria is acitinomyces

A - gram positive anaerobic
B - gram negative anaerobic
c- gram positive aerobic
D- gram negative aerobic

Answer 1

A - gram positive anaerobic bacteria

Question 2

what is the main antibiotic class used to treat acitinomyces

A - Cephalosporins
B- Tetracyclines
C- Beta lactams
D- Quinolones

Answer 2

C- Beta lactams (amoxicillin or penicillin often first line)

Question 3

Which method of investigation is preferred to identify acitinomyces

A - culture
B - gram stain
c- gram stain of pus or biopsy
d- gram stain swab

Answer 3

c - gram stain of pus or biopsy sample

Question 4

culture growth of acitinomyces is very slow
True or false

Answer 4

true - often can be identified by day 5 but should wait up to 10 days before concluding the result of the test.

Question 5

acitinomyces is considered a commensal organism

True or False

Answer 5

True

Question 6

what procedure increases the risk of a patient developing acitinomyces pelvic infection

Answer 6

IUD insertion (no evidence that the risk of infection is associated with a certain type of IUD)

Question 7

Once acitinomyces have invaded the tissues they cause a chronic granulomatous infection. what is classically seen on histology?

Answer 7

sulphur granules (yellow colour)

Question 8

what is the following description describing:
- basophilic masses with eosinophilic terminal clubs with a yellow colour.

Answer 8

sulphur granules

Question 9

what is the most common species of acitinomyces that is associated with pelvic infection

Answer 9

acitinomyces Israeli