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MicrobiologyBacteriology
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Q12644. Crystal violet blood agar is used for which bacteria?

A.Corynebacterium diphtheriae
B.Staph aureus
C.β-hemolytic streptococcus
D.Meningococcus

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Q12646. A chronic alcoholic is presenting with clinical features of meningitis. Most likely organism which will grow on CSF culture:

A.Streptococcus pneumoniae
B.N. meningitidis
C.Listeria monocytogenes
D.F. coli

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Q12647. Heating at 60°C for 30 minute would isolate:

A.Staphylococci
B.Enterococci
C.Micrococci
D.Streptococci

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Q12648. Which of the following can be used for obtaining specimen for isolation of microorganism in laboratory diagnosis:

A.Meningococcal rash
B.Blood in staphylococcal food poisoning
C.Throat swab in Rheumatic fever
D.Blood in post-streptococcal GN

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Q12654. Naegler's reaction is due to:

A.Coagulase
B.Hyaluronidase
C.Lecithinase
D.None of the above

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Q12655. True about corynebacterium diphtheriae:

A.All types produce toxin
B.Toxin production is dependent upon critical concentration of
C.Heat stable toxin
D.Inhibit cAMP

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Q12656. Not true about corynebacterium hormannii

A.A diphtheroid
B.Non-pathogenic saprophyte
C.Toxigenic
D.Also known as C pseudodiphthericum

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Q12658. All are true about chromobacteritun violaceum except?

A.Gram negative
B.Produces violet-colored pigment
C.Normal flora in human
D.Causes cellulitis

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Q12660. True about anthrax toxin are all except:

A.Has three fractions
B.Increase cAMP
C.Coded by plasmid
D.Inhibits protein synthesis

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Q12661. Regarding fungal cell wall all are true except:

A.Contains chitin
B.Prevent osmotic damage
C.Azoles act on them
D.Does not contain peptidoglycan

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Q12662. Capsule of Bacillus anthracis is formed of:

A.Polysaccharide
B.Lipopolysaccharide
C.Polypeptide
D.Long chain fatty acids

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Q12663. A child is presenting with vomiting and abdominal pain after 5 hours of eating some food. The most likely causa​tive orgonism:

A.Bacillus cereus
B.Cl. perfringens
C.Cl. botalinum
D.V. cholerae

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Q12664. All are true about listeria except:

A.Gram positive
B.PALCAM agar is used for isolation
C.Characteristic tumbling motility at 37°C
D.Umbrella shaped growth

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Q12665. Listeria resists phagocytosis in phagosomes (phagolysosomes) due to:

A.β-hemolysin
B.Caspases
C.Cell membrane adhesion molecules
D.Opacity associated protein (OAP)

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Q12669. Modified Ziehl-neelsen staining is used for:

A.Mycobacterium tuberculosis
B.Mycobacterium bovis
C.Nocardia
D.All of the above

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Q12670. Hansen's bacillus is cultured in:

A.L J medium
B.Robertson's cooked meat medium
C.Foot pad of mice
D.Sabraud's agar

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Q12672. Phagocytosis of mycobacterium tuberculosis by macro​phages is mainly mediated by:

A.IL 6
B.IL 3
C.IL 12
D.IFN Gamma

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Q12676. Salmonella and shigella can be differentiated from other enterobacteriaceae member by isolation on:

A.MacConkey agar
B.Mannitol salt agar
C.BCYE medium
D.XLD agar

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Q12678. Proteus isolated from a patient of UTI will show which boichemical reaction:

A.Phenylpyruvic acid reaction
B.Bile esculin reaction
C.Colchicine sensitivity
D.Bacitracin sensitivity

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Q12679. Hebra nose is caused by:

A.Frisch bacillus
B.Staph aureus
C.Pseudomonas
D.C. diphtheriae

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