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Bacteriology > Day 1 > Flashcards

Day 1 Flashcards

1
Q

What species is described?

“Found in pairs, tetrads, short chains, and irregular clusters ; can be beta or gamma hemolytic; most are facultative anaerobes; non motile and non spore forming; can produce toxins and enzymes; natural habitat of the skin and mucous membranes.”

A

Staphylococcus spp.

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2
Q

Beta hemolytic, catalase positive and coag positive

A

S.aureus

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3
Q

gamma hemolytic
catalase positive
coag negative
novobiocin susceptible

A

S. epidermis

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4
Q

gamma hemolytic
Catalase pos
Coag negative
Novobiocin resistant

A

S.sapro

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5
Q

What organism is the most common cause of staphylococcal infections?

A

S.aureus

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6
Q

What diseases does S. aureus cause? (6)

A 
Sinusitis 
Skin infections 
Toxic shock
Food poisoning 
Nosocomial infections 
Septicemia
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7
Q

What diseases does S.epidermis cause?

A

UTI’s
Post surgical infections
Endocarditis
Infections of indwelling devices and prosthetics

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8
Q

What diseases does S.saprophyticus cause?

A

Opportunistic UTI’s
Wound infections
Septicemia
Non-gonoccocal Urethritis and Prostatitis in males

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9
Q

What organism is of major concern in nosocomial infections due to antimicrobial resistance?

A

S.aureus(MRSA)

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10
Q

What organism is the Most common cause of infections in individuals with indwelling devices and prosthetics?

A

S.epi

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11
Q

What organism the suggested agent of non-gonoccocal urethritis and prostatitis in males?

A

S.saprophyticus

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12
Q

What does the catalase test differentiate between in regards to GPC?

A

Staph spp. and Strep spp.

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13
Q

What does the coagulase test differentiate between in regards of GPC?

A

S.aureus and other Staph spp.

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14
Q

What does the Novobiocin susceptibility test differentiate between in regards to GPC?

A

S.saprophyticus and S.epidermis(other coag neg staph)

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15
Q

What antibiotic are the discs impregnated with to differentiate between S.saprophyticus and othe coag neg staph?

A

5 micrograms Novobiocin

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16
Q

What spp. is described :
-found in chains or clusters
-Can be beta or gamma
Facultative anaerobes
-Can be grouped antigenically according to Lancefield grouping
-Normal flora of the alimentary, respiratory and genital tracts
-Natural habitat of the skin and mucus membranes

A

Streptococcus spp.

17
Q

What disease can result if pharyngitis caused by BSGA is not treated?

A

Rheumatic Fever and Glomerunephritis

18
Q

Beta hemolytic
Catalase neg
Taxo A sensitive

A

Streptococcus pyogenes(BSGA)

19
Q

Beta hemolytic
Catalase negative
Taxo A resistant
Causative agent of maternal and neonatal sepsis

A

S.agalactiae

20
Q

What streptococcus toxin is oxygen STABLE, non-immunogenic, and is a cell bound hemolysin?

A

Streptolysin S

21
Q

What streptococcus toxin is oxygen Labile?

A

Streptolysin O

22
Q

What organism is know to produce Streptolysin O?

A

S.pneumoniae and Clostridium spp.

23
Q

Catalase neg
Alpha hemolytic
Taxo P resistant
Causes opportunistic infections and is normal flora of the upper respiratory tract

A

Alpha streptococci

24
Q 
Catalase neg
Alpha hemolytic 
Taxo P sensitive 
Bile soluble
Autolysing
Resembles water droplets
A

S.pneumoniae

25
Q 
Catalase neg
Gamma or alpha 
Taxo P resistant 
Bile esculin negative 
Normal flora of the oral cavity, GI tract and female vaginal tract
A

Viridans Streptococci

26
Q

Catalase negative
Gamma hemolytic
Bile esculin positive

A

Enterococcus spp

27
Q

What organism is of major concern in nosocomial infections due to its antimicrobial resistance ?

A

Enterococcus spp. (VRE)

28
Q

What gives S.pneumoniae its virulence and how does this feauture protect the organism ?

A

Polysaccharide capsule that resists phagocytosis

29
Q

What is another name for Streptococcus agalactiae?

A

BSGB

30
Q 
Catalase neg
Beta hemolytic 
Taxo A resistant 
Sodium hippurate positive 
CAMP test positive
A

BSGB

S.agalactiae

31
Q 
Catalase negative 
Beta hemolytic 
Taxo A resistant 
Sodium hippurate negative 
CAMP test negative
A

Streptococcus not Group A or B

32
Q 
What causes:
Pharyngitis
Meningitis 
Endocarditis 
Septic Arthritis 
Infections of the respiratory tract
A

Beta Streptococcus groups C and G

33
Q

What is autolysing?

A

Cell begins dying

34
Q

Looks like bullseye colony or coin with raised ridges

A

Streptococcus pneumoniae

35
Q

What species is formerly known as Streptococcus faecalis or Group D Streptococcus?

A

Enterococcus faecalis

36
Q

What species is described below?

  • Normal flora in gastrointestinal tract of humans and animals
  • Opportunistic outside the intestinal tract
  • Etiological agents of UTI’s
  • Wound infections
  • Intra-abdominal abscesses
  • Nosocomial infections
A

Enterococcus spp.

Bacteriology (9 decks)

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