MCQ on Gram Positive Cocci (Streptococcus pyogenes, Streptococcus pneumoniae, Staphylococcus aureus)

Gram-Positive Cocci (Streptococcus pyogenes, Streptococcus pneumoniae, Staphylococcus aureus) -Multiple Choice Question

1) A 2 days old premature baby boy born to a 22-year-old woman develops pneumonia, the mother seems healthy although premature delivery during 35 weeks of gestation. The blood specimen is taken from the baby and cultured which shows bacterial growth with beta hemolysis. The mother develops urinary tract infection after giving birth, which could be the possible bacteria that transferred from the mother to the baby and caused infection?
a) Streptococcus pyogenes 
b) Streptococcus agalactiae 
c) Enterococcus faecalis
d) Streptococcus bovis 

2) Which of the following bacteria is the most frequent cause of pharyngitis?
a) Streptococcus pneumoniae
b) Staphylococcus aureus
c) Streptococcus pyogenes
d) Mycoplasma pneumoniae

3) A 9-year-old boy develops an erythematous rash around his face with redness of the skin, when examined no other signs or symptoms are observed but have swollen lymph nodes around the infection. The pathogen isolated is found to be gram-positive bacteria, what could be the possible diagnosis?
a) Glomerulonephritis
b) Erysipelas
c) Impetigo
d) Cellulitis

4) What other pathogens can also be the causative agent for the above disease condition?
a) Pseudomonas aeruginosa
b) Staphylococcus aureus >
c) Streptococcus agalactiae
d) Trichophyton rubrum

5) All of the following are the characteristics of Streptococcus pneumoniae, EXCEPT?
a) The colonies are diplococcus and encapsulated
b) Alpha hemolytic colonies appear in blood culture media
c) It is present as normal flora in healthy individuals
d) It grows well in a high concentration of glucose media >

6) Which of the following bacteria causes otitis media?
a) Streptococcus pneumoniae 
b) Streptococcus agalactiae
c) Streptococcus pyogenes
d) Streptococcus intermedius


7) Which of the following cocci is a part of normal flora in the mouth?
a) Streptococcus agalactiae
b) Staphylococcus saprophyticus
c) Staphylococcus epidermidis
d) Streptococcus mutans

8) What are the different infections caused by Group A Streptococcus spp? Select all the correct answers
a) Pharyngitis
b) Impetigo
c) Scarlet fever
d) Meningitis

9) Which of the following is the complications of autoimmune reaction from pharyngitis?
a) Rheumatic fever
b) Scarlet fever
c) Fasciitis
d) None of the above

10) Each of the following statement is correct about Enterococcus spp, EXCEPT?
a) They can grow in both aerobic and anaerobic conditions
b) Resistant to high salt concentrations
c) The morphological characteristics resemble that of S. pyogenes
d) The common cause of hospital-acquired infections

11) Name the cocci which are the part of bacterial flora found in human intestines? Select all the correct answers
a) Enterococcus faecalis
b) Micrococcus luteus
c) Staphylococcus epidermidis
d) Streptococcus mutans

12) Which of the following is NOT the virulent factor, an important antigenic property of S. pyogenes?
a) Endotoxins
b) Streptolysin
c) Streptokinase
d) M protein

13) Which of the following pathogen is the main cause of endocarditis in individuals having heart diseases?
a) Streptococcus intermedius
b) Enterococcus faecalis
c) Streptococcus suis
d) Micrococcus luteus

14) Which of the following is the most effective drug therapy for the infections caused by Enterococcus faecalis?
a) Cephalosporin
b) Aminoglycoside with penicillin
c) Macrolide
d) Oral penicillin V with ampicillin

15) Which of the following bacteria is most resistant to the drug vancomycin?
a) Enterococcus faecium
b) Streptococcus pyogenes
c) Staphylococcus aureus
d) Lactobacillus acidophilus


Multiple Choice Answers

1-b) Streptococcus agalactiae 
2-c) Streptococcus pyogenes
3-c) Impetigo 
4-b) Staphylococcus aureus 
5-d) It grows well in a high concentration of glucose media 
6-a) Streptococcus pneumoniae 
7-d) Streptococcus mutans
8- Option a), b) & c) 
9-a) Rheumatic fever
10-c) The morphological characteristics resemble that of S. pyogenes 
11-a) Enterococcus faecalis 
12-a) Endotoxins 
13-b) Enterococcus faecalis 
14-b) Aminoglycoside with penicillin 
15-a) Enterococcus faecium 

Comments

Post a Comment