Mcq Subject: Microbiology

Best site for collection of specimen for N. meningitides ?

A. Oral swab

B. Nasal swab

C. Nasopharyngeal swab

D. Skin lesions

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Frisch bacillus affects most commonly –

A. Mouth

B. Nose

C. Eye

D. Ear

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A young woman complains of recurrent rhinitis, nasal discharge and bilateral nasal blockage since one year. She also had history of allergy and asthma. On examination, multiple polyps with mucosal thickening and impacted secretions are seen in nasal, cavities. Biopsy was taken and the material on culture showed many hyphae with dichotomous branching typically at 45 degree. Which of the following is most likely organism responsible?

A. Rhizopus

B. Aspergilus

C. Mucor

D. Candida

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A 25-year-old man has a negative Dick test and a positive Schick test. These results indicate that he has

A. Neutralizing antibodies against diphtheria

B. Neutralizing antibodies against scarlet fever

C. A defect in cellular immunity

D. Had the full complement of diphtheria penussis tetanus (DPT) shots as a child

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Most pathogenic species of candida is

A. C. tropicalis

B. C. krusei

C. C. albicans

D. C. Stellatoidea

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Lactose fermentation is seen in –

A. Blood agar

B. Chocolate agar

C. MacConkey agar

D. LJ medium

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Ghon’s focus reflects: September 2005

A. Miliary tuberculosis

B. Primary complex

C. Tuberculous lymphadenitis

D. Post primary tuberculosis

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Tetanus is caused by

A. Clostridium perfringens

B. Clostridium tetani

C. Staphylococcus aureus

D. Bacillus cereus

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A man with chills, fever, and headache is thought to have “atypical” pneumonia. History reveals that he raises chickens and that approximately 3 weeks ago he lost many them to an undiagnosed disease. The most likely diagnosis of this man’s condition is

A. Anthrax

B. Q fever

C. Relapsing fever

D. Psittacosis

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A 10-year old child presented with severe sore throat and a grey pseudomembrane over pharynx and tonsils. The organism causing this infection is most likely:

A. A gram positive bacillus

B. A gram negative bacillus

C. A catalase-positive gram positive coccus that grows in clusters

D. A single-stranded positive sense RNA virus

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