Microbiology

Question 1

why does gram positive stain purple, and gram negative stain pink?

Answer 1

gram positive have a thicker cell wall, gram negative have a thinner cell wall so picks up less of the stain.

Question 2

bacterial conjunctivitis organisms in neonates

Answer 2

staph aureus
neisseria gonorrhoeae
chlamydia trachomatis

Question 3

bacterial conjunctivitis causative organisms

Answer 3

Staph aureus
Strep pneumoniae
Haemophilus influenzae (especially in children)

Question 4

treatment for bacterial conjunctivitis

Answer 4

topical antibiotic, usually chloramphenicol

Question 5

viral conjunctivitis organisms

Answer 5

adenovirus (most common)
herpes simplex
herpes zoster

Question 6

which type of conjunctivitis causes little vesicles around the eyelid

Answer 6

herpes simplex

Question 7

what is a hypopyon

Answer 7

the accumulation of white blood cells that form a whitish layer of fluid in the lower portion of the eye’s anterior chamber