Streptococci and Enterococci

Previous year questions on Streptococci and Enterococci for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Microbiology section of the exam.
Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
23 live questions in Streptococci and Enterococci.
4 of 23 questions carry a verified exam year: 2018, 2019, 2020.
Microbiology is worth about 20 of 300 questions on the exam. See every subject’s weightage.
Question set last updated 5 Sept 2026.

Q1.A newborn has a fever of 103degF. Blood culture grows gram-positive cocci in chains. This is most likely to be which of the following?
- AGroup A Streptococci (Streptococcus pyogenes)
- BGroup B Streptococci (Streptococcus agalactiae)
- CSalmonella species
- DStreptococcus pneumoniae
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Q2.a child presents with infective skin lesions of the leg culture showed hemolytic colonies which were gram +ve cocci in chains. the test to confirm the organism
- Abile solubility
- Boptochin sensitivity
- Cbacitracin sensitivity
- Dcatalase positive
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Q3.All are true about streptococcus Except
- AM-protein is responsible for production of mucoid colonies
- BM-protein is responsible for virulence
- CMucoid colonies are virulent
- DClassified based on their haemolytic properties.
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Q4.In a case of neonatal meningitis, the etiologic bacteria is found to have properties of beta hemolysis, bacitracin resistance, CAMP positive. Which of the following is the most likely causative agent?
- AS. pyogenes
- BS. agalactiae
- CS. pneumonia
- DE. faecalis
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Q5.Draughtsman colonies are seen with:
- AAnthrax
- BPnuemococci
- CPertussis
- DYersenia
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Q6.Super antigen is produced by which of the following-
- AStreptococcus pyogenes
- BClostridium perfringens
- CVibrio cholerae
- DStaphylococcus epidermidis
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Q7.True statement about antistreptolysin 'O' titer is
- AIn normal people the titre is > 200
- BIn acute glomerulonephritis the titre is low
- CASO titre > 200 indicate rheumatic fever
- DIt is poorly antigenic
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Q8.A 9 years old child presented to OPD with complaints of high grade fever, vomiting, one episode of seizure. CSF examination was done and Gram staining of the culture showed lanceolate shaped gram positive diplococci. What is the probable causative agent?
- AHaemophilus influenzae
- BNeisseria meningitidis
- CStreptococcus pneumoniae
- DStreptococcus agalactiae
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Q9.Quellung reaction is seen with:
- APneumococcus
- BGonococcus
- CStreptococcus
- DStaphylococcus
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Q10.Super antigens is produced by which of the following
- AStreptococcus Pyogenes
- BClostridium Perfringens
- CVibrio cholerae
- DStaphylococcus epidermidis
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Answer key

Q1: B. Group B Streptococci (Streptococcus agalactiae); Q2: C. bacitracin sensitivity; Q3: A. M-protein is responsible for production of mucoid colonies; Q4: B. S. agalactiae; Q5: B. Pnuemococci; Q6: A. Streptococcus pyogenes; Q7: B. In acute glomerulonephritis the titre is low; Q8: C. Streptococcus pneumoniae; Q9: A. Pneumococcus; Q10: A. Streptococcus Pyogenes.

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Streptococci and Enterococci

Answer key

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