Corynebacterium, Listeria and Actinomyces
- Previous year questions on Corynebacterium, Listeria and Actinomyces 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.
- 134 live questions in Corynebacterium, Listeria and Actinomyces.
- 4 of 134 questions carry a verified exam year: 2017, 2019.
- Microbiology is worth about 20 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 6 Sept 2026.
Q1.DOC for prophylaxis against Diphtheria is:-
- AErythromycin✓ Correct answer
- BRifampicin
- CCloxacillin
- DCiprofloxacin
Q2.The most frequent source of infection with Listeria monocytogenes is through which of the following?
- AHuman feces
- BLivestock
- CRaw milk✓ Correct answer
- DSoil
Q3.A chronic alcoholic is presenting with clinical features of meningitis. Most likely organism which will grow on CSF culture:
- AStreptococcus pneumoniae✓ Correct answer
- BN. meningitidis
- CListeria monocytogenes
- DE coli
Q4.All are true about listeria except-
- AGram positive
- BPALC AM agar is used for isolation
- CCharacteristic tumbling motility at 37degC✓ Correct answer
- DUmbrella shaped growth
Q5.Wrong about Corynebacterium diphtheriae
- AToxin production is chromosome mediated✓ Correct answer
- BDamage is by toxin production
- CToxic to heart and neurons
- DMore common in children
Q6.The frozen pelvis is seen in
- AOsteoarthritis
- BPotts disease
- CActinomycosis✓ Correct answer
- DReiters disease
Q7.A young female presents with symptoms and signs of meningitis. CSF shows gram-positive bacilli. The most likely causative agent is?
- AListeria monocytogenes✓ Correct answer
- BHaemophilus influenzae
- CPneumococcus
- DPseudomonas
Q8.In children commonest organ involved in nocardiosis is
- ALungs
- BBrain
- CSkin✓ Correct answer
- DRenal
Q9.Elek's gel precipitation test used for diagnosing:
- ACorynebacterium Jakeium
- BCorynebacterium diphtheriae✓ Correct answer
- CClostridium tetani
- DClostridium perfringens
Q10.5 year old child with pseudomembrane in throat, fever, sore throat, the organism causing is
- AComma shaped gram negative bacilli
- BClub shaped gram positive bacilli✓ Correct answer
- CSpore forming gram positive bacilli
- DFilamentous gram positive bacilli
Answer key
Q1: A. Erythromycin; Q2: C. Raw milk; Q3: A. Streptococcus pneumoniae; Q4: C. Characteristic tumbling motility at 37degC; Q5: A. Toxin production is chromosome mediated; Q6: C. Actinomycosis; Q7: A. Listeria monocytogenes; Q8: C. Skin; Q9: B. Corynebacterium diphtheriae; Q10: B. Club shaped gram positive bacilli.
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