Classification & characteristics of medically important Bacteria

Question 1

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

Answer 1

Endopigment - Golden yellow

Question 2

What type of blood hemolysis done by Staph. aureus?

Answer 2

B-hemolysis

Question 3

Where does Staph. aureus colonize?

Answer 3

Mainly in Nasal mucosa

Skin & Vagina

Question 4

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

Answer 4

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

Question 5

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

Answer 5

Pneumonia
Osteomyelitis
Bacteremia
Septicemia
Endocarditis

Question 6

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

Answer 6

Staph. aureus

Question 7

What species of bacteria can cause scalded skin syndrome?

Answer 7

Staph. aureus

Question 8

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

Answer 8

Protein A

Question 9

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

Answer 9

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

Question 10

Where do Strept. pyogenes colonize?

Answer 10

Skin & Oropharynx

Question 11

Which bacteria spp. causes scarlet fever?

Answer 11

Strept. pyogenes

Question 12

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

Answer 12

Strept. agalactiae

Question 13

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

Answer 13

Viridans Strept. e.g., S. mutans

Question 14

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

Answer 14

Strept. pneumoniae

Question 15

What is the effect of bile on S. mutans?

Answer 15

no effect

Question 16

What is the effect of bile on Strept. pneumoniae?

Answer 16

Lysis

Question 17

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

Answer 17

Human intistine

Question 18

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

Answer 18

no effect (tolerance)

Question 19

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

Answer 19

Strept. pyogenes

Question 20

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

Answer 20

anaerobic streptococci

Question 21

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

Answer 21

M protein

Question 22

Mention the Gram +ve bacilli which are spore forming.

Answer 22

Clostridium & Bacillus

Question 23

Mention Gram +ve bacilli that are able to produce exotoxins

Answer 23

Clostridium & Bacillus & Corynebacterium

Question 24

Mention Gram +ve bacilli having branching rods

Answer 24

Actinomycin & Nocardia

Question 25

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

Answer 25

Anaerobe

Question 26

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

Answer 26

Anaerobes

Question 27

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

Answer 27

Anaerobes

Question 28

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

Answer 28

Anaerobes

Question 29

Which bacterial spp. causes Malignant pustule

Answer 29

B. anthracis

Question 30

Which bacterial spp. causes wool sorter's disease?

Answer 30

B anthracis

Question 31

What medical complications can B. cereus cause?

Answer 31

Food poisoning & eye infections (rare)

Question 32

Which bacterial spp. causes nosocomial / antibiotic associated diarrhea?

Answer 32

Clostridium difficile

Question 33

Which bacterial spp. causes Gas gangrene?

Answer 33

Clostridium perfringens

Question 34

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

Answer 34

Clostridium perfringens

Question 35

Which bacterial spp. produce enterotoxin & cytotoxin?

Answer 35

Clostridium difficile

Question 36

What is the reservoir for Corynebacterium diphtheriae?

Answer 36

Man

Question 37

How is C. diphtheriae transmitted?

Answer 37

Droplets (mainly) & contact

Question 38

where does Actinomyces israelii reside in the human body?

Answer 38

Mouth, Gastrointestinal, female genital, upper respiratory tracts

Question 39

Which bacterial spp. causes actinomycosis?

Answer 39

Actinomyces israelii

Question 40

Which bacterial spp. causes actinomycetoma?

Answer 40

Nocardia brasiliensis

Question 41

What type of infections caused by Nocardia asteroids?

Answer 41

Bronchopulmonary infection

Question 42

What is the arrangement of Bacillus anthracis spp.?

Answer 42

Chains

Question 43

What is the composition of Bacillus anthracis capsule?

Answer 43

Polypeptide (poly-d-glutamate)

Question 44

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

Answer 44

Oxidase +ve

Question 45

How to identify N. meningitidis from N. gonorrhea?

Answer 45

Lactose fermentation N. meningitidis >> +Ve N. gonorrhea >> -ve

Question 46

What is the shape & arrangement of Neisseria spp.?

Answer 46

Cocci - Pairs (diplococci)

Question 47

All Neisseria spp. ferment glucose

Answer 47

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

Question 48

What is the reservoir for N. gonorrhea?

Answer 48

Genital tract

Question 49

What is the reservoir for N. meningitidis?

Answer 49

Nasopharynx

Question 50

What is Gonorrhea disease?

Answer 50

Urethritis caused by N. gonorrhea

Question 51

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

Answer 51

Bronchitis & Bronchopneumonia

Question 52

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

Answer 52

Moraxella catarrhalis

Question 53

what are the capsulated spp. in Enterobacteriaceae family?

Answer 53

Klebsiella & E. coli (some strains)

Question 54

What are the non-motile members in Enterobacteriaceae family?

Answer 54

Klebsiella & Shigella

Question 55

Enterobacteriaceae are obligate aerobes. (T/F)

Answer 55

False - facultative anaerobes

Question 56

Enterobacteriaceae are oxidase -ve? (T/F)

Answer 56

True

Question 57

Enterobacteriaceae all ferment glucose? (T/F)

Answer 57

True

Question 58

Enterobacteriaceae reduce nitrite to nitrate? (T/F)

Answer 58

False - reduce nitrate to nitrite

Question 59

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

Answer 59

Outer membrane Lipopolysaccharide - the outer polysaccharide portion.

Question 60

H Ag lies in which component of the bacteria?

Answer 60

Flagella

Question 61

K Ag lies in which component of the bacteria?

Answer 61

Capsule