Haemophilus
- Previous year questions on Haemophilus 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.
- 36 live questions in Haemophilus.
- 1 of 36 questions carries a verified exam year: 2019.
- Microbiology is worth about 20 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 5 Sept 2026.
Q1.H.parainfluenzae requires which of the following factors
- AOnly Factor X
- BOnly Factor V✓ Correct answer
- CBoth factor X and V
- DNone of the above
Q2.Which among the following is a Coccobacilli is:
- AEscherichia coli
- BListeria monocytogenes
- CHaemophilus influenzae✓ Correct answer
- DPseudomonas aeruginosa
Q3.a 2 year old child is brought to the ER with h/o fever and vomiting. o/e he has neck rigidity. the csf report shows 2000/ml protein 100mg/dl the gram stain shows the presence of gram negative bacilli the culture shows growth of bacteria only on chocolate agar and not on blood agar the causative agent is :
- Aneisseria meningitidis
- Bhaemophilus influenzae✓ Correct answer
- Cbordetella pertussis
- Dstreptococcus pyogenes
Q4.Which of the following is not true about H. influenza?
- ARarely presents as meningitis in children less than 2 months of age
- BCapsular polypeptide protein is responsible for virulence✓ Correct answer
- CRequires factor V and X for growth
- DMost common invasive disease of H. influenza is meningitis
Q5.A 55yrs man presents to the OPD with low grade fever, cough since 5 days, he says that there is increased production of sputum. He is a known case of chronic bronchitis , diabetes. All of the following are used by the causative organism to cause the disease except?
- APili
- BOuter membrane protein
- CLipooligosaccharide
- DCapsular polysaccharide✓ Correct answer
Q6.The following are true for Bordetella pertussis except-
- AIt is a strict human pathogen
- BIt can be cultured from the patient during catarrhal stage
- CIt leads to invasion of the respiratory mucosa✓ Correct answer
- DInfection can be prevented by a acellular vaccine
Q7.All of the following are true regarding Haemophilus influenzae except
- AIt can be a part of the normal flora in some persons
- BThe serotyping is based on the bacterial outer membrane proteins✓ Correct answer
- CIt requires Haemin and NAD for growth in culture medium
- DType b is responsible for invasive disease
Q8.The following are true for Bordetella pertussis except?
- AIt is a strict human pathogen
- BIt can be cultured from the patient during catarrhal stage
- CIt leads to invasion of the respiratory mucosa✓ Correct answer
- DInfection can be prevented by a acellular vaccine
Q9."Fish in stream" appearance is seen in?
- AHemophilus ducreyi
- BProteus
- CMycoplasma
- DV. Cholerae✓ Correct answer
Q10.A previously healthy 18-month-old girl is brought to the office with 2 days of irritability, poor appetite, and pulling at her left ear. She has no known allergies, and her temperature is 102.8 F. She is easily consoled by the mother and moves her neck spontaneously without discomfort. There is a clear discharge from the nares. The left tympanic membrane is erythematous, dull, and bulging. Which of the following virulence factors is generally absent in the strains of the causative organism that produce otitis media, compared with those that produce epiglottitis or meningitis?
- ABeta-Lactamase
- BIgA protease
- CLipopolysaccharide
- DPolyribitol phosphate✓ Correct answer
Answer key
Q1: B. Only Factor V; Q2: C. Haemophilus influenzae; Q3: B. haemophilus influenzae; Q4: B. Capsular polypeptide protein is responsible for virulence; Q5: D. Capsular polysaccharide; Q6: C. It leads to invasion of the respiratory mucosa; Q7: B. The serotyping is based on the bacterial outer membrane proteins; Q8: C. It leads to invasion of the respiratory mucosa; Q9: D. V. Cholerae; Q10: D. Polyribitol phosphate.
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