Gram + Cocci

Question 1

normal human flora on the skin and mucous membranes ?

Answer 1

Staphylococcus epidermidis

Question 2

What is the drug of staphylococcus epidermidis ?

Answer 2

Vancomycin

Question 3

normal human flora of the mucosa of the genital tract in young women ?

Answer 3

Staphylococcus saprophyticus

Question 4

urinary tract infection in sexually active women ?

Answer 4

Staphylococcus saprophyticus

Question 5

Oxidase negative ?

Answer 5

Staphylococcus and streptococcus

Question 6

Oxidase positive ?

Answer 6

Neisseria

Question 7

α-hemolytic → green color in ?

Answer 7

pneumoniae & viridans

Question 8

β-hemolytic → clear zone = complete hemolysis in ?

Answer 8

pyogenes (group A) & agalactiae (group B)

Question 9

β-hemolytic , bacitracin sensitive , The most frequent bacterial cause of pharyngitis ?

Answer 9

Streptococcus pyogenes

Question 10

Streptokinase (fibrinolysin): converts plasminogen to plasmin→
dissolve fibrin in clots in ?

Answer 10

Streptococcus pyogenes

Question 11

In the streptococcus pyogenes the necrotizing fasciitis (flesh eating bacteria) is caused by ?

Answer 11

Pyrogenic exotoxin B

Question 12

In the streptococcus pyogenes the scarlet fever is caused by ?

Answer 12

Erythrogenic toxin

Question 13

In the streptococcus pyogenes the streptococcal toxic shock syndrome (STSS) is caused by ?

Answer 13

Pyrogenic exotoxin A

Question 14

Invasive (rapidly spreading infection Causing bacteraemia or septicaemia ) in the streptococcus pyogenes?

Answer 14

1- Erysipelas
2-Cellulitis
3-Puerperal sepsis
4- Acute bacterial endocarditis

Question 15

What is the Immunologic (Post- streptococcal disease) in streptococcus pyogenes ?

Answer 15

1- Acute glomerulonephritis (AGN)

2- Acute rheumatic fever (ARF)

Question 16

after skin infection ?

Answer 16

Acute glomerulonephritis (AGN)

Question 17

after throat infection , due to the close identity between M protein and heart ?

Answer 17

Acute rheumatic fever (ARF)

Question 18

Strep test (rapid antigen detection) in the ?

Answer 18

Streptococcus pyogenes

Question 19

Antistreptolysin O is Antibody detection (serologic tests) of ?

Answer 19

ARF diagnosis

Question 20

Anti-DNAse is Antibody detection (serologic tests) of ?

Answer 20

AGN diagnosis

Question 21

What is the treatment of streptococcus pyogenes ?

Answer 21

penicillin G

Question 22

What is the treatment of AGN in the streptococcus pyogenes ?

Answer 22

Long acting penicillin for ARF

Question 23

β-hemolytic , bacitracin resistance , CAMP factor positive , Hippurate hydrolysis positive (purple color) ?

Answer 23

Streptococcus agalactiae

Question 24

In the Streptococcus agalactiae , acquired by the infant from infected birth canal, cause ?

Answer 24

neonatal septicaemia, meningitis

Question 25

In the Streptococcus agalactiae , Carrier women should receive intravenous or intrapartum ?

Answer 25

ampicillin

Question 26

α-haemolytic , optochin resistance , Don’t ferments insulin , bile insoluble ?

Answer 26

Viridans streptococci

Question 27

What is the Prophylaxis of Viridans streptococci ?

Answer 27

Antibiotics as amoxicillin before any dental procedure

Question 28

G+ Lancet-shaped (lanceolate) diplococci ?

Answer 28

Streptococcus pneumoniae

Question 29

What is the Feature of Streptococcus pneumoniae ?

Answer 29

1- G+ Lancet-shaped (lanceolate) diplococci
2- Optochin sensitive
3- Bile soluble
4- Ferments insulin
5- Quellung positive (capsule swelling)
6- Capsulated (polysaccharide capsule)

Question 30

What is the disease of Streptococcus pneumoniae ?

Answer 30

1- Pneumococcal pneumonia (lobar pneumonia)
2- Pneumococcal meningitis
3- Otitis media, Sinusitis & Mastoiditis
4- Conjuctivitis, Endocarditis

Question 31

What is the treatment of Streptococcus pneumoniae ?

Answer 31

Penicillin

Question 32

What is the prevention by vaccinee in the Streptococcus pneumoniae ?

Answer 32

1- Pneumococcal polysaccharide vaccine (PPSV-23)

2- Pneumococcal conjugate vaccine (PCV13)

Question 33

4 Infections by which one of the following bacteria are typically treated with penicillins such as amoxicillin because they exhibit neither lowlevel resistance nor highlevel resistance and synergy with an aminoglycoside is not required in order for penicillins to be eective ?

Answer 33

Streptococcus pyogenes

Question 34

5 Your patient in the emergency room has a 5cm ulcer on her leg that is surrounded by a red warm and tender area of inflammation You do a Gram stain on pus from the ulcer and see grampositive cocci in chains Culture of the pus grows small βhemolytic colonies that are catalasenegative and are inhibited by bacitracin These results indicate that the organism causing her lesion is most likely

Answer 34

Streptococcus pyogenes

Question 35

The Jones family of four had a delicious picnic lunch last Sunday It was a warm day and the food sat in the sun for several hours Alas 3 hours later everyone came down with vomiting and nonbloody diarrhea In the emergency room it was found that Mrs Jones who prepared the food had a paronychia on her thumb Which one of the following is the most likely causative organism ?

Answer 35

Staphylococcus aureus

Question 36

20yearold sexually active woman reports dysuria and other symptoms of a urinary tract infection Gram stain of the urine reveals grampositive cocci Which one of the following sets of bacteria is most likely to cause this infection

Answer 36

Staphylococcus saprophyticus and Enterococcus faecalis

Question 37

Your patient is a 2weekold infant who was well until 2 days ago when she stopped feeding and became irritable She now has a fever to 3C has developed a petechial rash all over her body and is very diicult to arouse In the emergency room a blood culture and a spinal tap were done Gram stain of the spinal fluid showed grampositive cocci in chains Culture of the spinal fluid on blood agar revealed βhemolytic colonies that grew in the presence of bacitracin and hydrolyzed hippurate Which one of the following is the most likely causative organism ?

Answer 37

Streptococcus agalactiae