Microbiology Flashcards Preview

2MB Ophthalmology > Microbiology > Flashcards

Flashcards in Microbiology Deck (29)
Loading flashcards...
1

List the main organisms that cause neonatal bacterial conjunctivitis

Staph. aureus
Neisseria gonorrhoea
Chlamydia trachomatis

2

All cases of neonatal bacterial conjunctivitis should be referred. True/False?

True

3

List the main organisms that cause bacterial conjunctivitis

Staph. aureus
Strep. pneumoniae
H. influenzae

4

List symptoms of bacterial conjunctivitis

Red, hot eyes
Hazy vision
Sticky discharge
Eyelids stick together

5

Bacterial swabs should be taken prior to prescribing antibiotics for bacterial conjunctivitis. True/False?

True

6

What is the main topical antibiotic for bacterial conjunctivitis?

Chloramphenicol

7

When must chloramphenicol be avoided?

History of aplastic anaemia
Allergy

8

How does discharge in bacterial conjunctivitis differ from adenoviral conjunctivitis?

Bacterial: sticky
Adenoviral: watery

9

List the 3 main organisms that cause viral conjunctivitis

Herpes simplex
Adenovirus
Herpes zoster

10

When should chlamydial conjunctivitis be suspected?

Unresponsive to treatment/chronic
Bilateral conjunctivitis in young adults
Less discharge + less irritating
Lymphocyte follicles

11

What is hypopyon?

Inflammatory cells in the anterior chamber of the eye
Appears as exudate over the eye

12

What type of ulcer can result from viral herpetic keratitis?

Dendritic ulcer

13

Bacterial keratitis usually occurs in association with other corneal disease. True/False?

True
Also contact lens wear

14

Herpetic keratitis should be treated with steroids. True/False?

FALSE
Steroids can cause corneal melt + perforation

15

List symptoms of orbital cellulitis

Painful eye movements
Proptosis
Pyrexia
Swelling
Sight-threatening

16

List the main organisms that cause orbital cellulitis

Staph.
Strep.
Coliforms
H. influenzae
Anaerobes

17

IV antibiotics may be started before culture results in orbital cellulitis. True/False?

True
Broad-spec

18

What is endophthalmitis and how is it usually caused?

Devastating infection inside the eye
Trauma, nail guns, surgery, injections

19

What is the most common organism cause of endophthalmitis?

Staph. epidermidis

20

Outline treatment of endophthalmitis

Intravitreal amikacin + vancomycin
Topical antibiotics

21

List the main causes of chorioretinitis

CMV in AIDS
Toxoplasma gondii
Toxocara canis

22

What type of infection is toxoplasmosis?

Protozoan

23

What is toxocara?

Roundworm infection that affects cats/dogs but can spread to humans

24

What is the danger of toxocara?

Can form granules to cause irreversible visual loss

25

What are the 3 main types of eye swabs?

Bacterial
Viral
Chlamydial

26

What investigation may be done for bacterial keratitis?

Corneal scrape

27

What investigation may be done for endophthalmitis?

Vitreous/aqueous culture

28

When might antivirals be used for eye disease?

Dendritic ulcers of the cornea

29

What is the main treatment for chlamydial conjunctivitis?

Topical oxytetracycline