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Diagnostic Micro Exam 1 > Gram Positive Rods > Flashcards

Gram Positive Rods Flashcards

0
Q

Aerobic Actinomycetes

A

Branch & break off to look like coccobacillus
Capnophilic - likes CO2
Acid fast - mycolic acid in cell walls
Kinyoun stain - weak decolorizer causing partial acid fast to fuschia color

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1
Q

Actinomycetes

A

Acts like a fungus
Bacteria - prokaryote
Fungus - eukaryote
Branchers

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2
Q

Nocardia species

A

N. asteroides

N. brasiliensis

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3
Q

N. asteroides

A 
Rarely a pathogen
Infection - pulmonary & cutaneous
Draining sinuses - pathway for something to drain out
Sulfur granules - bacteria in granules
Resistant to lysozyme
Substrates & sequencing 
-casein agar - milk agar
-clearing around it to use up = hydrolysis
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4
Q

N. brasiliensis

A

Uses casein & tyrosine

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5
Q

Gordona/Gordonia

A

Opportunistic pathogen

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6
Q

Actinomadura

A

brancher

heaped colony

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7
Q

Streptomyces

A

brancher
not partially acid fast
not resistant to lysozyme

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8
Q

Bacillus

A

Spore forming

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9
Q

Spores/endospores

A

withstand heat & chemicals
gram stain - spores don’t pick up stain
schaffer-fulton stain stains spores with malachite green

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10
Q

Anthrax types

A

Cutaneous
Inhalation
Gastrointestinal

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11
Q

Cutaneous anthrax

A

Eschar - black lesion

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12
Q

Gastrointestinal anthrax

A

identifies B. anthracis
nonmotile
non hemolytic

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13
Q

Penicillin disk test for anthrax

A

20mm+ = sensitive
zone of inhibition
string of pearls induced by presence of penicillin

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14
Q

Sodium bicarbonate

A

media that helps bacteria form capsule

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15
Q

India ink stain

A

helps identify capsule

16
Q

B. cereus

A

causes food poisoning
caused by grains - cereal, rice
emetic - vomiting

17
Q

PEA phenyl ethyl agar

A

selective

18
Q

B. anthracis

A 
hemolysis -
motility -
hydrolysis -
PEA -
penicillin -
lecithinase production +
catalase +
19
Q

B. cereus

A 
hemolysis +
motility +
hydrolysis +
PEA +
penicillin +
lecithinase production +
catalase +

Diagnostic Micro Exam 1 (6 decks)

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