Microbiology Flashcards Preview

STEP > Microbiology > Flashcards

Flashcards in Microbiology Deck (20):
1

hyaluronic acid significance

component of group A strep extracellular capsule; believed to play a role in virulence.

2

Only gram-positive that produces LPS

listeria

3

Periodic acid schiff stain use in microbio

Stains fungi

4

What does gram staining detect?

peptidoglycan, which is present in a thick layer in Gram-positive bacteria. The membrane is being stained.

5

How do Gram-negative bacteria appear?

Gram-negative stain with the counterstain (safranin or fuschine), giving Gram-negatives a RED or PINK coloring.

6

What do gram-positive retain?

Crystal violet dye.

7

What happens if you stain acid-fast bacteria?

Show up as if they are gram-positive, mostly because of thick cell wall.

8

How do gram positives appear on gram stain?

purplish-blue

9

What causes skin presentation in scarlet fever?

erythrogenic toxin

10

respiratory tract epithelia?

Everything is ciliated columnar except for the vocal folds (squamous) and epiglottis (squamous)

11

Respiratory papillomatosis

- caused by HPV types 6 and 11.
- warts form on the larynx or other areas of the respiratory tract causing dyspnea.

12

Respiratory papillomatosis histology

finger-shaped lesions with benign vascular core lined with BENIGN squamous epithelium

13

hemochromatosis gene

6

14

dysthymia

Mood disorder similar to depression but with less severe but *longer-lasting symptoms.

15

schizoaffective

Greater than 2 weeks of hallucinations or delusions WITHOUT major mood episodes + periods of concurrent major mood episodes with schizophrenic symptoms.

16

genetics of panic disorder

strong genetic component

17

alpha-amanitin inhibits

RNA pol II

18

cryptococcus on a slide

Looks like RBCs

19

cryptococcus stain

Periodic-acid-schiff (PAS)

20

Which are hardier naked or enveloped viruses?

Naked viruses are hardier and can survive gastric acid in the stomach.