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Microbiology > Classification & characteristics of medically important Bacteria > Flashcards

Classification & characteristics of medically important Bacteria Flashcards

1
Q

What is the type & color of Staph. aureus pigment?

A

Endopigment - Golden yellow

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2
Q

What type of blood hemolysis done by Staph. aureus?

A

B-hemolysis

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3
Q

Where does Staph. aureus colonize?

A

Mainly in Nasal mucosa

Skin & Vagina

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4
Q

What types of pyogenic infection are produced by Staph. aureus?

A

Localized e.g., impetigo, furuncles, carbuncles, eyelid inf., surgical site inf.

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5
Q

What are the deep-seated infections could be acquired in Staph. aureus infection?

A 
Pneumonia
Osteomyelitis
Bacteremia
Septicemia
Endocarditis
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6
Q

What species of bacteria can cause food poisoning & toxic shock syndrome?

A

Staph. aureus

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7
Q

What species of bacteria can cause scalded skin syndrome?

A

Staph. aureus

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8
Q

Mention one protein found on Staph. aureus bacteria which inhibits phagocytosis.

A

Protein A

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9
Q

mention the types of agars on which Staph. aureus can grow and mention the effect

A

Blood agar&raquo_space; B-hemolysis
Mannitol salt agar&raquo_space; Fermentation of mannitol
Nutritional agar&raquo_space; produce golden yellow colonies.

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10
Q

Where do Strept. pyogenes colonize?

A

Skin & Oropharynx

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11
Q

Which bacteria spp. causes scarlet fever?

A

Strept. pyogenes

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12
Q

What is the resident bacteria in vagina & causes neonatal infections?

A

Strept. agalactiae

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13
Q

What is the spp. which reside in the oral cavity and cause dental caries?

A

Viridans Strept. e.g., S. mutans

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14
Q

What is the resident bacteria in the oropharynx which cause Lobar pneumonia?

A

Strept. pneumoniae

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15
Q

What is the effect of bile on S. mutans?

A

no effect

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16
Q

What is the effect of bile on Strept. pneumoniae?

A

Lysis

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17
Q

What is the natural habitat of Enterococcus faecalis & Enterococcus faecium?

A

Human intistine

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18
Q

what is the effect of bile on Enterococcus faecalis & Enterococcus faecium?

A

no effect (tolerance)

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19
Q

Which spp. of bacteria causes post-infectious sequelae like glomerulonephritis and rheumatic fever?

A

Strept. pyogenes

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20
Q

According to the gaseous needs, to which type do Peptostreptococcus bacteria belong?

A

anaerobic streptococci

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21
Q

Which protein is found on Strept pyogenes cell wall inhibits phagocytosis?

A

M protein

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22
Q

Mention the Gram +ve bacilli which are spore forming.

A

Clostridium & Bacillus

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23
Q

Mention Gram +ve bacilli that are able to produce exotoxins

A

Clostridium & Bacillus & Corynebacterium

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24
Q

Mention Gram +ve bacilli having branching rods

A

Actinomycin & Nocardia

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25
Q

According to the gaseous needs, to which type do Clostridium spp. belong?

26
Q

According to the gaseous needs, to which type do Lactobacillus spp. belong?

27
Q

According to the gaseous needs, to which type do Actinomycin spp. belong?

28
Q

According to the gaseous needs, to which type do Propionibacterium spp. belong?

29
Q

Which bacterial spp. causes Malignant pustule

A

B. anthracis

30
Q

Which bacterial spp. causes wool sorter’s disease?

A

B anthracis

31
Q

What medical complications can B. cereus cause?

A

Food poisoning & eye infections (rare)

32
Q

Which bacterial spp. causes nosocomial / antibiotic associated diarrhea?

A

Clostridium difficile

33
Q

Which bacterial spp. causes Gas gangrene?

A

Clostridium perfringens

34
Q

Which bacterial spp. has the following characteristics:
nonmotile
Stormy fermentation in milk
Double zone of hemolysis

A

Clostridium perfringens

35
Q

Which bacterial spp. produce enterotoxin & cytotoxin?

A

Clostridium difficile

36
Q

What is the reservoir for Corynebacterium diphtheriae?

37
Q

How is C. diphtheriae transmitted?

A

Droplets (mainly) & contact

38
Q

where does Actinomyces israelii reside in the human body?

A

Mouth, Gastrointestinal, female genital, upper respiratory tracts

39
Q

Which bacterial spp. causes actinomycosis?

A

Actinomyces israelii

40
Q

Which bacterial spp. causes actinomycetoma?

A

Nocardia brasiliensis

41
Q

What type of infections caused by Nocardia asteroids?

A

Bronchopulmonary infection

42
Q

What is the arrangement of Bacillus anthracis spp.?

43
Q

What is the composition of Bacillus anthracis capsule?

A

Polypeptide (poly-d-glutamate)

44
Q

What is the result of oxidase test in all Neisseria spp.?

A

Oxidase +ve

45
Q

How to identify N. meningitidis from N. gonorrhea?

A

Lactose fermentation
N. meningitidis&raquo_space; +Ve
N. gonorrhea&raquo_space; -ve

46
Q

What is the shape & arrangement of Neisseria spp.?

A

Cocci - Pairs (diplococci)

47
Q

All Neisseria spp. ferment glucose

A

It is just that i couldn’t write it as a question XD

48
Q

What is the reservoir for N. gonorrhea?

A

Genital tract

49
Q

What is the reservoir for N. meningitidis?

A

Nasopharynx

50
Q

What is Gonorrhea disease?

A

Urethritis caused by N. gonorrhea

51
Q

In patients with chronic obstructive pulmonary disease (COPD), what possible complications can be caused with Moraxella catarrhalis?

A

Bronchitis & Bronchopneumonia

52
Q

Which member of normal flora can cause otitis & sinusitis in Healthy individuals?

A

Moraxella catarrhalis

53
Q

what are the capsulated spp. in Enterobacteriaceae family?

A

Klebsiella & E. coli (some strains)

54
Q

What are the non-motile members in Enterobacteriaceae family?

A

Klebsiella & Shigella

55
Q

Enterobacteriaceae are obligate aerobes. (T/F)

A

False - facultative anaerobes

56
Q

Enterobacteriaceae are oxidase -ve? (T/F)

57
Q

Enterobacteriaceae all ferment glucose? (T/F)

58
Q

Enterobacteriaceae reduce nitrite to nitrate? (T/F)

A

False - reduce nitrate to nitrite

59
Q

O Ag (somatic Ag) lies in which part of the bacteria? what portion is it?

A

Outer membrane Lipopolysaccharide - the outer polysaccharide portion.

60
Q

H Ag lies in which component of the bacteria?

61
Q

K Ag lies in which component of the bacteria?

Microbiology (2 decks)

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