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Medical microbiology > Microbiology > Flashcards

Microbiology Flashcards

1
Q

Main cause of wound infections

A

Staphylococcus aureus

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2
Q

SAU virulence factors

A

Coagulase positive and TSST

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3
Q

What is the group type for Streptococcus pyogenes

A

Gp A beta haemolytic streptococcus

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4
Q

Bacteria structure for Steptococci pyogenes

A

Gram positive cocci in pairs and chains

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5
Q

Disease for S.pyogenes

A

Pharyngitis; Non infectious sequelae; ARF, RHD, SSTI

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6
Q

Normal flora in mucosa

A

Anaerobes, multiple streptococci, staphylococci

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7
Q

Prophylactic abx prior GI surgery

A

Cephalosporins and metronidazole

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8
Q

Microorganisms in cat bites

A

Anaerobes & mixed oral flora, Pasteurella multocida

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9
Q

Contact lens bugs

A

Pseudomonas aeruginosa

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10
Q

Farm worker with black lesion

A

Bacilllus anthrax

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11
Q

Bacteria structure for streptococcus pneumoniae

A

Gram positive cocci in pairs and chains

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12
Q

Most common bacteria cause of pneumonia

A

Streptococcus pneumoniae (SPN)

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13
Q

Risk factors for SPN

A

Age, crowd, alcohol, capsule, splenectomy, haematological disorders

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14
Q

Bacteria structure for Haemophilus influenzae

A

Gram neg rod +/- polysaccharide capsule (type b is infamous, common in community)

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15
Q

What diseases Haemophilus influenzae can caused

A

Pneumonia, COPD exacerbations, epiglotitis, meningitis, cellulitis, osteomyelitis

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16
Q

Risk factors for Hi

A

Age< 5 y/o (Hib vaccine for children <5y/o and risk groups), asplenic, complement deficiency.

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17
Q

How Mycoplasma and Chlamydophila pneumoniae spread and diagnose

A

Person to person respiratory spread; diagnosed by serology, Nucleic acid test

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18
Q

Where legionella pneumophila usually found

A

From environment, water, air con units, hot water taps, shower heads, med equipment. Usually caused outbreaks for both CAI, HAI

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19
Q

Diagnostic test for legionella pneumophila

A

Urine antigen test

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20
Q

Which abx doesnt work for the atypical pneumonia

A

Beta lactams does not work! Use Quinolones and macrolides

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21
Q

Bacteria structure for Burkholderia pseudomallei

A

Gram ned rod

22
Q

How patient acquired Burkholderia pseudomallei

A

Acquired from soil, tropics through inhaled /wounds

23
Q

Risk groups for Burkholderia pseudomallei

A

DM, Alcohol, chronic lung disease

24
Q

Most common UTI pathogens

25
Common UTI pathogens in sexually active women
Staphylococcus saprophyticus (GPC)
26
CAI acquired UTI pathogens
S. Saprophyticus
27
HAI acquired UTI pathogens
KPN (GNR), Proteus (GNR), Enterococci (GPC)
28
What is the group type for STREPTOCOCCUS AGALACTIAE
Gp B beta haemolytic streptococcus
29
Meningitis pathogens
GBS, E coli, listeria, streptococcus pneumoniae*, neisseria meningidities, haemophilu infleunzae, Mycobacterium tuberculosis
30
Bacteria structure for Listeria monocytogenes
Gram positive rod
31
Which abx is resistant and sensitive to Listeria monocytogenes
Resistant to cephalosporins, sensitive to penicillin
32
How patient acquired listeria monocytogenes
Food: unpasteurised cheese, pate, vegetavles
33
Bacteria structure for Neisseria meningitidis
Gram neg coccus (10% of ppl carried in the nasopharnx)
34
Virulence factors for Neisseria meningitidis
Polysaccharide capsule (Gp A,B,C,Y, W135)
35
Who shall obtain Neisseria meningitidis vaccines
Hajj
36
Clostridium difficile bacteria structure
Anaerobic gram positive bacillus
37
Does abx selectively target pathogens?
No, it attack anywhere
38
The normal flora includes pathoges
Yes
39
Skin flora includes E coli
No
40
LPS is exotoxin
No, endotoxin
41
Is endotoxin found in the outer cell membrne
Yes
42
Peptidoglycan is part of the cell wall
Yes
43
The streptococcus pneumoniae capsule is a component of the conjugated vaccine
Yes
44
Is S.aureus has coagulase?
Yes
45
Mortality rate for S. aureus
30%
46
Is debridement a vital part for wound management?
Yes
47
Does streptococcus (GAS) causes impetigo?
Yes
48
Is necrotising fasciitis responds well to abx?
No
49
Is bite infections polymicrobial
Yes
50
Do we cover anaerobes when mucosae incolved?
Yes
51
Is aplenia a risk factor for CAPSULATED bacteria
Yes

Medical microbiology (1 decks)

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