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What does a positive schick test indicate?a. Carrier of diphtheriab. I...

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presence of antitoxin levels or schick test.This test is done by injecting 0.1ml of highly purified toxin into one forearm and 0.1ml of heat inactivated toxin into another forearm

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2013-11-16 10:40:15
does positive schick test indicate Carrier diphtheriab Immune diphtheriac Susceptible diphtheria Hypersensitivity diphtheriaImmune statusan individual Corynebacterium diphtheriaassessed bypresenceantitoxin levels schick testThis testdone injecting 01mlhighly purified toxin into one forearm and 01mlheat inactivated toxin into another forearm ascontrolA positive reactioncharacterized bylocal inflammatory reaction that reaches maximum intensity4-7 days and reduces gradually This indicates absenceimmunity diphtheriae Negative reaction indicates presenceantitoxin inindividual neutralizestoxin injected Such individuals immune todiphtheriae infectionReference:1 Sherris Medical Microbiology Kenneth Ryan 5th Edition Chapter 262 TextbookMicrobiology and Immunology Parija Page 224
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Topic :- MOCK TEST 2

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.......

Subject :-random

Topic :- MOCK TEST 2

How does staphylococcus aureus differ from staphylococcus epidermidis coagulase positive common cause UTIc forms white colonies blood agard causes endocarditis drug addictsStaphylococcus aureus coagulase positive whereas staphylococcus epidermidis coagulase negative Other coagulase negative staphylococci haemolyticus saccharolyticus hominis schleiferi lugdunensis and simulans Reference:Textbook Microbiology and Immunology Parija Pages 188-190.......

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

Subject :-random

Topic :- MOCK TEST 2

following change observed following neonatal thymectomy Decrease size germinal centerb Increased antibody production cellsc Increased bone marrow production lymphocytesd Decrease size paracortical areas lymph nodes lymphocytes selectively seeded into certain sites peripheral lymphatic tissues such white pulp spleen around central arterioles and paracortical areas lymph nodes These regions have been termed thymus dependent regions they depleted after neonatal thymectomy Secondary thymectomy there reduction size paracortical regions lymph node and periarteriolar tissue spleen lymph node thymus dependent paracortical areas shows depletion lymphocytes while there loss lymphoid cells around small blood vessels spleen Reference:1 Nutrition Immunity and Infections Prakash Shetty Page 442 Histology Ray Henrikson Volume 518 Page 220.......

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

Subject :-random

Topic :- MOCK TEST 2

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.......

Culture media used for diagnosis EHEC 0157 is:a. cultureb. Sorbitol MacConkey

Subject :-random

Topic :- MOCK TEST 2

Culture media used for diagnosis EHEC 0157 is:a cultureb Sorbitol MacConkey media XLD Agard Deoxycholate MediaNon- DNA- dependent methods used for routine diaggnosis EHEC 0157: This serotype suggested isolation E-coli that fails fermant sorbitol MacConkey sorbitol; latex aggulination confirms Reference:1 Kliegman Behrman Jenson Stanton (2008) “Nelson textbook Pediatrics” Chapter 197 “Escherichia coli” Volume Page 11962 Textbook Microbiology Ananihnarayanan 7th Edition Page 2793 Medical Microbiology Jawetz 24th Edition Page 2544 Current Diagnosis and Treatment Infectious Diseases 11th Edition Page 550.......

What the major role HLA class III region genes?a. Immune surveillanceb. Transplant

Subject :-random

Topic :- MOCK TEST 2

major role HLA class III region genes Immune surveillanceb Transplant rejection phenomenonc Antigen presentation and eliminationd Governing susceptibility autoimmune diseasesHLA class III contains genes for early complement components and classical pathway Deficiency these early components classical pathway associated with autoimmune disease like SLE and other collagen vascular diseases These genes thus important regulating susceptibility autoimmune disease Class III genes not participate MHC restriction graft rejection components Many proteins coded MHC class III genes may involved development autoimmunity Reference:1 Textbook Immunology Basir Page 93-42 Essential Immunology Roilt Page 2623 Textbook Microbiology Ananthanarayan and Panicker 6th Edition Page 108.......

What does MHC class III genes encode?a. Interleukin 2b. Beta microglobulinc. Tumor necro

Subject :-random

Topic :- MOCK TEST 2

does MHC class III genes encode Interleukin Beta microglobulinc Tumor necrosis factor Complement component MHC class III genes encodes proteins classic and alternate complement pathways (C2 and properdin factor soluble proteins tumor necrosis factors (TNF alpha beta) HSP and hydroxylase producing gene Genes coding for Class III MHC molecules located class III region chromosome between HLA locus and HLA class III molecules not histocompatibility antigens but certain soluble molecules such complement components and tissue necrosis factor Reference:Textbook Immunology Basir Pages 93-4.......

All the following statements about cells are true except:a. They express IgG rece

Subject :-random

Topic :- MOCK TEST 2

All following statements about cells true except:a They express IgG receptorsb They MHC restricted cytotoxic cells They derived from large granular cellsd They comprise about human peripheral lymphoid cells cells kill target cells with low levels MHC class expression hence they not MHC restricted Normal cells inhibited from killing cells because all nucleated normal cells express self class MHC molecules viral infection neoplastic transformation reduces expression class molecules inhibitory signals delivered cells interrupted and lysis occurs Reference:Robbins Pathologic Basis Disease 6th Edition Page 191.......

Which the following marker used identify Memory cells?a. RAb. RBc.

Subject :-random

Topic :- MOCK TEST 2

following marker used identify Memory cells RAb RBc RCd ubiquitous marker all leukocytes this detected memory/activated cells cortical thymocytes monocytes/macrophages and granulocytes Reference:Rheumatology and Immunology Therapy: Essentials Larry Moreland Page 199.......

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