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BDS1 > Bacteria growth and identification > Flashcards

Bacteria growth and identification Flashcards

1
Q

What do prokaryotes and eukaryotes both have?

A

Cell membrane
Ribosomes

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2
Q

What are pilli?

A

Found on surface of bacteria cells and are used to adhere to bacteria and other structures

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3
Q

What type of salt agar is used for selective bacteria growth?

A

Mannitol salt agar

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4
Q

What does capnophilic bacteria mean?

A

Grows in presence of carbon dioxide

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5
Q

What does facultative mean?

A

Can grow with or without oxygen

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6
Q

What does microaerophilic mean?

A

Requires small amounts of oxygen

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7
Q

S aureus will turn the mannitol salt agar what colour?

A

Yellow

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8
Q

What colour do gram positive stain?

A

Purple due to peptidoglycan layer

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9
Q

What colour do gram negative bacteria stain?

A

Pink as Thin peptidoglycan layer

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10
Q

What toxins do gram negative bacteria produce?

A

Endotoxin

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10
Q

What toxins do gram negative bacteria produce?

A

Endotoxin

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11
Q

What is the gram negative endotoxin?

A

Lipopolysaccharide

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12
Q

What shape is coccus?

A

Circle round shape

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13
Q

What is meant by strepto?

A

Long chain

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14
Q

What is meant by staphyl?

A

Clumps

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15
Q

What is an example of gram positive cocci?

A

Dental caries caused by streptococcus mutans

16
Q

What is an example of gram positive bacilli?

A

Clostridium tetanii

17
Q

What is an example of gram negative cocci?

A

Neisseria meningitidis

18
Q

What is an example of gram negative bacilli?

A

Prevotella intermedia, chronic periodontitis

19
Q

What is meant by colonisation?

A

Presence of microorganisms in or on a host

20
Q

What are risk factors for S aureus colonisation?

A

Antibiotic use
Diabetic, renal dialysis, HIV, obesity
Hospitalisation
Colonised partner

21
Q

What is infection?

A

Invasion of the body by pathogenic microbes and the reaction of the tissues to their presence and to the toxins generated by them

22
Q

What is an example of a S aureus infecrtion?

A

Angular chellitis

BDS1 (43 decks)

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