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April 27, 2026

This is Microbiology mcq set-3 containing mcq from question 21 to 30 in the series of hundreds Microbiology mcq which are very important for staff nurse, AIIMS, PGIMER nursing recruitment examinations. MCQ are given below:

Microbiology MCQ Question 21:-

Most common malignancy in AIDS is;

(a) Kaposi sarcoma
(b) B-cell lymphoma
(c) Leukaemia
(d) Burkitt’s lymphoma

Ans: (a) Kaposi sarcoma ✔

Microbiology MCQ Question 22:-

Most effective mode of transmission of HIV:

(a) Sexual
(b) Blood product
(c) Needle/ syringe
(d) Mother of fetus

Ans: (b) Blood product ✔

Microbiology MCQ Question 23:-

Best indicator of HIV prognosis

(a) CD4T cell count
(b) CD8 T cell count
(c) HIV RNA
(d) ELIS

Ans: (a) CD4T cell count ✔

Microbiology MCQ Question 24:-

During the window period of patient with AIDS, best diagnostic test is;

(a) ELISA
(b) Western Blot
(c) Rapid test
(d) RT-PCR

Ans: (d) RT-PCR ✔

Microbiology MCQ Question 25:-

Zero does of OPV is given:

(a) At one month
(b) At birth
(c) When child is having diarrhoea
(d) When child is having polio

Ans: (b) At birth ✔

Microbiology MCQ Question 26:-

Chemical used for sterilization of heart lung machine is ……

(a) Hypochlorite
(b) Ethylene oxide
(c) Cidex
(d) Korsolex

Ans: (b) Ethylene oxide ✔

Microbiology MCQ Question 27:-

Acid fast staining is used to detect…….

(a) Mycobacterium TB
(b) C. tetani
(c) HIV/ AIDS
(d) Meningococci

Ans: (a) Mycobacterium TB ✔

Microbiology MCQ Question 28:-

All of the following viruses are transmitted by respiratory route except:

(a) Influenza virus
(b) Rota virus
(c) Respiratory syncytial virus
(d) Rhinovirus

Ans: (b) Rota virus ✔

Microbiology MCQ Question 29:-

Most accurate method of diagnosis of Helicobacter pylori is:

(a) Culture
(b) Biopsy urease test
(c) Histopathology
(d) Urea breath virus

Ans: (d) Urea breath virus ✔

Microbiology MCQ Question 30:-

Site for injecting Schick test toxin/purified protein derivative (Mantoux test) is……

(a) Right upper arm
(b) Left upper arm
(c) Right forearm
(d) Left forearm

Ans: (d) Left forearm ✔

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