Explore topic-wise MCQs in Mycobacterium.

This section includes 38 Mcqs, each offering curated multiple-choice questions to sharpen your Mycobacterium knowledge and support exam preparation. Choose a topic below to get started.

1.

Diagnosis of tuberculosis is done by
A. Emulator and antiformin method
B. Concentration method
C. Petroff s method
D. All of the above
Answer» E.
Discussion
2.

Which of the following determine the pathogenicity of Yersinia pestis?
A. V and W antigens
B. F1 envelope antigen
C. Production of pigmented colonies on haemin containing media
D. All of these
Answer» E.
Discussion
3.

Verotoxin 1 of Escherichia coli is similar to
A. cholera toxin
B. shiga toxin
C. heat-stable enterotoxin of E. coli
D. heat-labile enterotoxin of E. coli
Answer» C. heat-stable enterotoxin of E. coli
Discussion
4.

Sereny test is used for the detection of
A. enteropathogenic Escherichia coli
B. enterotoxigenic E. coli
C. enteroinvasive E. coli
D. verotoxigenic E. coli
Answer» D. verotoxigenic E. coli
Discussion
5.

This is the main symptom of Tuberculosis
A. Liquid formation
B. Tubercle formation
C. both (a) and (b)
D. None of these
Answer» C. both (a) and (b)
Discussion
6.

Which of the following species/subspecies of Klebsiella produce indole?
A. K pneumoniae subspecies rhinoscleromatis
B. K pneumoniae subspecies aerogenes
C. K pneumoniae subspecies pneumoniae
D. K oxytoca
Answer» E.
Discussion
7.

Species of Shigella which is predominant in India is
A. S sonnei
B. S dysenteriae
C. S boydii
D. S flexneri
Answer» E.
Discussion
8.

Traveller's diarrhea is caused by
A. enteropathogenic Escherichia coli (EPEC)
B. entero invasive E. coli (EIEC)
C. entero toxigenic E. coli (ETEC)
D. entero haemorrhagic E. coli (EHEC)
Answer» D. entero haemorrhagic E. coli (EHEC)
Discussion
9.

The causative of Tuberculosis produces Tuberculin, it is a/an
A. enzyme
B. hormone
C. endotoxin
D. exotoxin
Answer» D. exotoxin
Discussion
10.

This is the reason why diagnosing tuberculosis is turning challenging
A. disease takes years to become active
B. symptoms are irregular, they appear and then vanish
C. symptoms are not very obvious and prominent always
D. both (b) and (c)
Answer» B. symptoms are irregular, they appear and then vanish
Discussion
11.

Which of the phage types of Mycobacterium tuberculosis occurs most frequently in India?
A. Type A
B. Type B
C. Type C
D. Type I
Answer» E.
Discussion
12.

Humans become infected with Mycobacterium tuberculosis most frequently by
A. inhalation
B. ingestion
C. contact
D. inoculation
Answer» B. ingestion
Discussion
13.

A combination of medications which are applied to treat tuberculosis is
A. to generate a better response
B. to decrease the resistance of the entity to the treatment
C. both (a) and (b)
D. none of these
Answer» D. none of these
Discussion
14.

The BCG vaccine is administered for immunity against
A. Malaria
B. Tuberculosis
C. Jaundice
D. Hepatitis
Answer» C. Jaundice
Discussion
15.

For Tuberculosis, the drugs used to combat it are
A. Streptomycin, Pyrazinamide
B. Isoniazid, Rifampicin
C. Both (a) and (b)
D. None of these
Answer» D. None of these
Discussion
16.

Which of these is the culture medium for Mycobacterium tuberculosis?
A. Wilson blair medium
B. L wenstein Jensen medium
C. Mac Conkey s medium
D. None of the above
Answer» C. Mac Conkey s medium
Discussion
17.

The first person who discovered Mycobacterium tuberculosis was
A. Louis Pasteur
B. Robert Koch
C. Edward Jenner
D. None of the above
Answer» C. Edward Jenner
Discussion
18.

The causative of tuberculosis is
A. Virus
B. Bacterium
C. Malnutrition
D. Protozoan
Answer» C. Malnutrition
Discussion
19.

Members of the genus Mycobacterium are
A. gram-positive
B. acid-fast
C. non-motile
D. all of these
Answer» E.
Discussion
20.

Which one of the following acid-fast rod bacilli can take up to ten years for its growth in host cells and causes skin infections?
A. Mycobacterium tuberculosis
B. Mycobacterium avium complex
C. Mycobacterium leprae
D. Nocardia spp
Answer» D. Nocardia spp
Discussion
21.

A 50 years old patient who had his kidney transplant 6 months ago visited the hospital with pneumonia like symptoms for 2 months, the infection was similar to tuberculosis. The chest x-ray examination revealed a typical feature of tuberculosis infection. A photochromogenic (orange pigment when exposed to UV light) acid-fast rod bacterium was isolated from the sputum sample. The identified bacteria is:
A. Mycobacterium avium
B. Mycobacterium tuberculosis
C. Mycobacterium kansasii
D. Mycobacterium leprae
Answer» D. Mycobacterium leprae
Discussion
22.

Which of the following bacteria causes lung infection and is the most common non-tuberculous mycobacterial infection associated with AIDS patients?
A. Mycobacterium avium complex
B. Mycobacterium leprae
C. Mycobacterium gordonae
D. Mycobacterium gastri
Answer» B. Mycobacterium leprae
Discussion
23.

Which of these following categories of people do not require the test for TB infection?
A. A 30 years old man traveling from India to the USA for the first time
B. A 45 years old woman contradicted with HIV infection
C. A 7 years old healthy girl living together with her grandmother who has tuberculosis infection
D. None of the above
Answer» E.
Discussion
24.

All of the following are the symptoms of pulmonary tuberculosis, EXCEPT?
A. Weakness and fatigue
B. Decreased body temperature
C. Weight loss
D. Severe prolonged cough with sputum or blood
Answer» C. Weight loss
Discussion
25.

Which of the following pathogen has the shorter incubation period and is a nontuberculous mycobacterium?
A. Mycobacterium ulcerans
B. Mycobacterium avium complex
C. Mycobacterium leprae
D. Mycobacterium fortuitum
Answer» E.
Discussion
26.

All of the following are examples of selective media used for the culture of M. tuberculosis, Except?
A. Inspissated egg media
B. Middlebrook 7H10/7H11 media with antibiotics
C. Dubos media
D. Middlebrook 7H10 media without antibiotics
Answer» E.
Discussion
27.

Which of the following statement is true about the tuberculin test and purified protein derivative (PPD)?
A. The presence of intradermal skin induration is observed in 6 to 8 hours after being applied
B. The redness of skin or erythema is also measured while reading the tuberculin test
C. A positive tuberculin test means that a person was infected with M. tuberculosis in the past and continues to carry the viable organism
D. A positive PPD test indicates that a person can never be infected with M. tuberculosis
Answer» D. A positive PPD test indicates that a person can never be infected with M. tuberculosis
Discussion
28.

What is the mechanism responsible for antibiotic resistance in M. tuberculosis?
A. Mutations in DNA gyrase gene
B. Alterations in beta-lactamase
C. Mutations in the catalase-peroxidase gene
D. Alterations in RNA polymerase
Answer» D. Alterations in RNA polymerase
Discussion
29.

The nitrate reduction test is one of the primary biochemical tests in identifying M. tuberculosis, which of the following biochemical test is useful in the identification of lipase producing M. kansasii and M. marinum?
A. Tween 80 hydrolysis test
B. Neutral red test
C. Tellurite reduction test
D. Bile esculin test
Answer» B. Neutral red test
Discussion
30.

A 16-year-old boy from a remote region in Australia is presented to the hospital with a painless lesion in the left side of the neck, the lesion first appeared about 2 months ago was small but turned into a bigger yellowish-white papule as the days passed. The boy did not have any underlying disease condition and did not have any clinical symptoms during the examination. A tissue sample was taken and sent to the laboratory, gram staining and acid-fast staining showed gram positive rods, after 4 weeks of incubation transparent colonies appeared on the culture media. Name the possible pathogen?
A. M. ulcerans
B. M. bovis
C. M. avium
D. M. leprae
Answer» B. M. bovis
Discussion
31.

All of the following are the rapid and confirmatory staining techniques, Except?
A. Ziehl neelsen method
B. Fluorochrome stain
C. Dorner method
D. Kinyoun method
Answer» D. Kinyoun method
Discussion
32.

The specimen of the Mycobacterium tuberculosis should be handled with safety and caution, which of the following statement is correct regarding the laboratory diagnosis of Tuberculosis?
A. It is one of the most common laboratory acquired infection
B. Saliva and nasal secretions are the common specimens used for the diagnosis
C. Acid-fast staining method is the rapid detection method for microscopy
D. The culture media with the specimen needs the CO2 concentration of 5 to 10 %
Answer» C. Acid-fast staining method is the rapid detection method for microscopy
Discussion
33.

The treatment regimen for initial therapy of tuberculosis caused by M. tuberculosis includes?
A. Streptomycin and rifampin
B. Isoniazid, streptomycin, and ethambutol
C. Rifampin, isoniazid, and ciprofloxacin
D. Isoniazid, rifampin, pyrazinamide, and ethambutol
Answer» E.
Discussion
34.

Other than Mycobacterium tuberculosis which of the following bacteria causes tuberculosis infection in animals and can be transmitted to humans by consumption of milk and other animal products?
A. Mycobacterium ulcerans
B. Mycobacterium leprae
C. Mycobacterium bovis
D. Mycobacterium abscessus
Answer» D. Mycobacterium abscessus
Discussion
35.

What is the interferon-gamma release assay?
A. The antigen detection test for the Mycobacterium spp
B. The DNA detection test in Mycobacterium spp
C. The test used as an alternative tuberculin skin test in latent tuberculosis
D. The test used as an alternative tuberculin skin test in the active tuberculosis
Answer» B. The DNA detection test in Mycobacterium spp
Discussion
36.

All of the given are the distinguishing characteristics of Mycobacterium leprae, EXCEPT:
A. It is an acid-fast bacillus
B. It cannot be isolated in-vitro culture method
C. It is a human and as well as animal pathogen
D. It can be isolated by only in-vivo culture method
Answer» D. It can be isolated by only in-vivo culture method
Discussion
37.

Which of the following first-line antibiotics are usually resistant to Mycobacterium tuberculosis?
A. Isoniazid and ciprofloxacin
B. Isoniazid and Rifampin
C. Rifampin and ciprofloxacin
D. Rifampin and streptomycin
Answer» C. Rifampin and ciprofloxacin
Discussion
38.

Mycobacteria are acid-fast positive bacteria because of:
A. the presence of lipopolysaccharide in the bacterial cell wall
B. the presence of mycolic acid in the bacterial cell wall
C. the presence of lipids
D. Both B and C options above
Answer» E.
Discussion