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MOCK TEST 2

random mcqs questions

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Heat stable enterotoxin causing food poisoning is caused by all the fo...

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Explanation :-

ns. Food poisoning is caused by an enterotoxin which is heat labile.The 4 major toxins produced by it are alpha, beta, epsilon and iota.Alpha toxin which is a phospholipase C is a

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2013-11-16 10:40:15
Heat stable enterotoxin causing food poisoning caused all following except:a Bacillus cereusb Staphylococcusc Yersinia enterocoliticad Clostridium perfringensClostridium perfringens produces distinct toxins including several enterotoxins Food poisoningcaused enterotoxinheat labileThe major toxins produced alpha beta epsilon and iotaAlpha toxin isphospholipaseis associated with gas gangrene Ithemolytic hot-cold variety toxin produced all Clperfringens but most abundantly Type shows Nagler reactionzoneopacityformed thereno antitoxin Lecithinasealso produced Clnovyi Clbifermentans some vibrios initiates muscle infection that may progress gas gangreneBeta and iota toxin also have lethal and necrotizing propertiesTheta toxin hemolysisantigenically related streptolysin also known Perfringolysin also produces neuraminidase histamine bursting factor etcReference:TextbookMicrobiology Ananthanarayan and Panicker 8th Edition Page 395
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following statement about Bacteroides true strictly aerobicb can cause peritonitis gram positive bacillid Presence stool culture indicates need for treatmentBacteroides commonly responsible for abdominal infections such subphrenic abscess hepatic abscess peritonitis appendicitis and brain abscess Reference:Sherris Medical Microbiology Kenneth Ryan 5th Edition Chapter .......


All the following statements about Listeria are true except:a. gram negative bacte

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All following statements about Listeria true except:a gram negative bacteria causes abortion pregnancyc causes meningitis neonatesd transmitted contaminated milkListeria monocytogenes short coccoid gram positive catalase positive non spore forming rod with tendency occur chains They show tumbling motility degree centigrade and non motile degree The major virulence factors invasion associated surface proteins called internalin and pore-forming cytotoxin listeriolysin (LLO) Reference:1 Sherris Medical Microbiology Kenneth Ryan 5th Edition Chapter 262 Textbook Microbiology Ananthanarayan and Panicker 8th Edition Page 395.......


Which the following infection transmitted through rat urine?a. Listeriab. Legionella

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Which the following investigation done diagnose typhoid patient after day

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following investigation done diagnose typhoid patient after days onset fever Widal Blood culturec Stool cultured Urine cultureFollowing typhoid infection agglutinins usually appear end 1st week blood taken earlier will give negative result Antibody titers increases steadily till 3rd 4th week after declines gradually Widal test used for measurement agglutinins for typhoid and paratyphoid bacilli done after weeks onset fever titer against antigen 1:320 and against antigen 1:640 considered positive Reference:Textbook Microbiology Ananthanarayan and Panicker 8th Edition Page 296.......


What does positive schick test indicate?a. Carrier diphtheriab. Immune diphtheriac

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How does staphylococcus aureus differ from staphylococcus epidermidis ?a. coagulase

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Which the following change observed following neonatal thymectomy ?a. Decrease

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Bacteria can transfer genetic information through all the following methods except:

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Bacteria can transfer genetic information through all following methods except: Through conjugationb Through bacteriophagesc Through incorporation part host DNA taking soluble DNA fragments across their cell wall from other speciesGenetic information can transferred from one bacterium another through three methods transformation transduction and conjugation Methods transferMechanismNature DNA transferredTransformationTransfer DNA from one bacterium anotherAny geneTransductionTransfer DNA from one bacterium another bacteriophageAny gene generalized transduction only selected genes specialized transductionConjugationTransfer DNA from one bacterium another through sex pilusChromosomal plasmid DNAReference:1 Textbook Microbiology Ananthanarayan and Panicker 6th Edition Page 532 Textbook Microbiology and Immunology Parija Pages 54-7.......


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