NEET Pattern Microbiology And Immunology Solved Model Question Paper 2023

NEET Pattern Microbiology And Immunology Model Question Paper 2023

Question.1. Which bacterial structure is responsible for adherence?

1. Mesosomes
2. Cytoplasmic membrane
3. Fimbriae
4. Flagella

Answer. (3) (Fimbriae)

Fimbriae or pili are the organ of adhesion.

Read And Learn More: Micro Biology And Immunology Model Question Papers With Answers

Question.2. Active disinfectant property of Bleaching powder is mainly due to formation of:

1. Hydrogen chloride
2. Hypochloric acid
3. Hypochlorous acid
4. Chloramines

Answer. (3) (Hypochlorous acid)

Hypochlorous acid is the Active molecule of Bleaching powder.

Question.3. Toxin of which of the following bacteria acts as superantigen?

1. V. cholerae
2. S. pyogenes
3. S. epidermidis
4. C. perfringens

Answer. (2) (S. pyogenes)

Streptococcus pyrogenic exotoxin is an example of superantigen.

Question.4. Identify the shown antibody isotype:

1. IgM
2. IgA
3. IgE
4. IgG

Answer. (2) (IgA)

The picture given here shows two molecules of antibodies joined together by J chain and a secretory component…………. Suggestive of secretary IgA

Question.5. Which culture media is used for identification of E. coli O157:H7?

1. MacConkey agar
2. Sorbitol MacConkey agar
3. TCBS
4. DCA agar

Answer. (2) (Sorbitol MacConkey agar)

Sorbitol MacConkey agar is sued for E.coli O157:H7.EHEC, in contrast to other E. coli, does not ferment sorbitol and produces pale colonies.

Question.6. A child presents with fever, neck rigidity and generalized rash as shown in the figure. Later he developed shock and hemorrhage. Gram stain revealed gram-negative diplococci. What is the likely agent?

1. L. monocytogenes
2. H. influenzae
3. N. meningitidis
4. S. pneumoniae

Answer. (3) (N.meningitidis)

It’s a case of meningitis (fever, neck rigidity)with generalised rash, shock and hemorrhage.Gram stain od CSF revealed gram-negative diplococci……….Suggestive of meningococcal meningitis.

Question.7. A 12-year-old girl is exposed to a case of meningococcal meningitis in school. What should she prophylactically receive?

1. Polysaccharide conjugate vaccine single dose
2. 1 doses of polyvalent vaccine
3. No vaccination
4. Empirical ceftriaxone

Answer. (2) (1 doses of polyvalent vaccine)

Meningococcal polyvalent vaccine: 50 µg of each polysaccharide antigen per dose is used, administered as two doses, 2–3 months apart to children of 3–18 months of age or a single dose to older children or adults.

Question.8. A young male presented with complaints of urethritis. Which organism cannot cause this presentation?

1. C. trachomatis
2. H. ducreyi
3. N. gonorrhoeae
4. T. vaginalis

Answer. (2) (H. ducreyi)

Urethritis can be caused by gonococcus, and non-gonococcal urethritis by Chlamydia,Trichomonas, Candida, Herpes.

Question.9. Which of the following can present as food poisoning within 3 hrs of food intake?

1. S. enteritidis
2. S. aureus
3. C. perfringens
4. V. parahemolyticus

Answer. (2) (S. aureus)

Food poisoning within 6 hrs of food intake, can be caused by S.aureus, B.cereus and C.botulinum.

Question.10. Causative agent for donovanosis is:

1. C. trachomatis
2. K. granulomatis
3. L. donovani
4. H. ducreyi

Answer. (2) (K. granulomatis)

Donovanosis, also called granuloma inguinale, is a sexually transmitted disease caused by Klebsiella granulomatis, previously called as Calymmatobacterium granulomatis.

Question.11. All are true for Japanese encephalitis except:

1. Pigs are amplifier host
2. Humans are reservoir of infection
3. Vaccination of pigs is an effective control measure
4. Vector is Culex vishnuii

Answer. (2) (Humans are reservoir of infection)

• Pigs are amplifier host for Japanese encephalitis
• Ardeid (wading) birds such as herons, cattle egrets, and ducks can also be involved in the natural cycle of JE virus and may act as reservoir of infection.
• Vaccination of pigs is an effective control measure
• Vector for JE are Culex tritaeniorhynchus (most common) and Culex vishnuii

Question.12. Which is the latest pandemic strain of influenza?

1. H1N1
2. H5N7
3. H5N1
4. H7N9

Answer. (1) (H1N1)

Influenza A (H1N1) pdm09has caused the most recent pandemic of influenza, emerged in California in March 2009 and rapidly spread to the entire world including India over the next few months. WHO declared the pandemics on 11th June 2009.

Question.13. Vector of Zika virus:

1. Anopheles
2. Culex
3. Aedes
4. Sandfly

Answer. (3) (Aedes)

Zika virus is transmitted by vector (Aedes aegypti), Mother-to-child (vertical) and sexual routes.

Question.14. A patient present with recurrent painful lesions as shown below. What is the diagnosis?

1. Herpangina
2. Ludwig angina
3. Herpes labialis
4. Trench mouth

Answer. (3) (Herpes labialis)

Recurrent painful tiny vesicular ulcers surrounding lips….. suggestive of herpes labialis.

Question.15. A female presented with soft, sessile and warty lesions on vulva, which were spreading to other parts. What is the diagnosis?

1. Condyloma acuminata
2. Chancroid
3. Molluscumcontagiosum
4. Herpes genitalis

Answer. (1) (Condyloma acuminata)

Soft, sessile, and warty lesions on vulva…. Suggestive of Condyloma acuminata.

Question.16. Which of the following fungal infection follows traumatic inoculation?

1. Blastomycosis
2. Coccidiodes
3. Paracoccidiodes
4. Sporothrix

Answer. (4) (Sporothrix)

Spores of S. schenckii are introduced into skin following minor trauma caused by thorn prick or splinter injury; followed by spread along the lymphatics.

Question.17. Culture obtained from the lesion shown below demonstrates branching with narrowed ends. What is the diagnosis?

1. C. diphtheriae
2. C. albicans
3. CMV
4. HSV

Answer. (2) (C. albicans)

Oropharyngeal candidiasis (oral thrush) presents as white, adherent, painless patches in the mouth. Candida on culture smear appears gram-positive budding yeast cells with long pseudohyphae.

Question.18. Identify this intensely itchy lesion on trunk:

1. Tinea
2. DLE
3. Lichen planus
4. Psoriasis

Answer. (1) (Tinea)

Dermatophytoses (or tinea or ringworm) presents as well-demarcated annular- or ringshaped pruritic scaly skin lesions with central clearing and raised edges.

Question.19. HIV patient presents with chronic watery diarrhea. Colonoscopic biopsy is shown below. What is the diagnosis?

1. CMV
2. Microspora
3. Giardia
4. Cryptosporidium

Answer. (4) (Cryptosporidium)

• Chronic watery diarrhea in HIV patient is suggestive of Coccidian parasites such as Cryptosporidium, Cyclospora, and Cystoisospora
• The picture here shows acid fast oocyst, round, 4-6µm size.

Question.20. Identify the given organism:

1. D. latum
2. T. trichiura
3. S. hematobium
4. A. duodenale

Answer. (2) (T. trichiura)

Picture depicts iodine mount, showing barrel shaped eggs with mucus plugs at ends.

Question.21. A young female presents with whitish discharge per vaginum. On examination, the cervix was covered with punctate red dots resembling a strawberry. What is the diagnosis?

1. Gardnerella vaginalis
2. Candida albicans
3. Trichomonas vaginalis
4. Herpes genitalis

Answer. (3) (Trichomonas vaginalis)

• Young female presenting with whitish discharge per vaginum and cervix covered with punctate red dots resembling a strawberry……..Suggestive of Trichomonas vaginalis infection
• Strawberry appearance of vaginal mucosa (Colpitis macularis) is observed in 2% of patients of Trichomonas vaginalis. It is characterized by small punctate hemorrhagic spots on vaginal and cervical mucosa.

Question.22. A pregnant female presents with chills, rigors and fever. Peripheral blood smear (thin) is shown below. What is the likely agent?

1. P. vivax
2. P. falciparum
3. P. ovale
4. P. malariae

Answer. (2) (P. falciparum)

Peripheral blood smear (thin smear) in the given picture shows multiple ring forms, ring forms 1.5 µm size, occupying 1/6th of RBC(smaller than in P. vivax), with small chromatin dot…… suggestive of P. falciparum.

Question.23. Onset of symptoms after___hrs of hospital admission in a previously asymptomatic patient is termed as HAI:

1. 24 hrs
2. 48 hrs
3. 72 hrs
4. 90 hrs

Answer. (2) (48 hrs)Healthcare-associated infections (HAIs) can be defined as the infections acquired in the hospital by a patient:

• Who was admitted for a reason other than that infection.
• In whom the infection was not present or incubating at the time of admission
• Symptoms should appear at least after 48 hours after admission
• This include infections acquired in the hospital but appearing after discharge, and also
  occupational infections among staff of the hospital care facility.

Question.24. Which of the following BMW is disposed in yellow bags as per current guidelines?

1. Broken glasspieces
2. Blood-bags
3. Metallic sharps
4. Urine-bags

Answer. (2) (Blood bags)

According to BMW rule 2016:

• Broken glass pieces- should be segregated in blue container
• Blood bags- should be segregated in yellow bag
• Metallic sharps should be segregated in sharp (white) container
• Urine bags should be segregated in red bag

Question.25. Chemical waste is disposed in which bag?

1. Red
2. Yellow
3. Blue
4. Black

Answer. (2) (Yellow)

According to BMW rule 2016; Chemical waste is disposed in yellow bag.

Question.26. Which of the following is a class A bioterrorism agent?

1. C. burnetti
2. B. anthracis
3. Nipah virus
4. B. pseudomallei

Answer. (2) (B. anthracis)

Class A bioterrorism agent include:

• Anthrax (Bacillus anthracis)
• Botulism (Clostridium botulinum toxin)
• Plague (Yersinia pestis)
• Tularemia (Francisellatularensis)
• Smallpox (Variola major)
• Hemorrhagic viruses: Arenaviruses, Crimean-Congo virus,
• Ebola, Marburg virus