microbiology ch 12 ( lactobacilli, cornybacteria, and propionibacteria) Flashcards Preview

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Flashcards in microbiology ch 12 ( lactobacilli, cornybacteria, and propionibacteria) Deck (8)
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1
Q

Lactobacilli

A

love low ph ( aciduric), oral cavity and human vagina, alpha or non haemolytic, ferment carbohydrates to make acid, grow at ph 6,

2
Q

2 main groups of lactobacilli

A

homofermentors- produce lactiv acid

heterofermentors- produce lactic acid, acetate, ethanol and CO2

3
Q

Corynebacteria diptheria

A

human throat, nose, sometimes skin, cell wall contains mycolic acid, Divide via snapping fission,

4
Q

corynebacteria diptheria’s tox gene

A

subunit A- adenosine diphosphate ribosylating function

subunit B- binds toxin to cell surface receptors

5
Q

c. diptherias toxins

A

exotoxin which results in grey psuedomembrane that may obstruct airway. It affects motor nerves of myocardium and nervous system

6
Q

what converts the toxin to a toxoid?

A

formaldehyde , a toxoid is non toxic but still antigentic

7
Q

what test is ran to see if the diptheria has the exotoxin?

A

elek plate test

8
Q

propionibacteria

A

is a diptheroid ( like diptheria)