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Salmonella typhi can be isolated at different times from ?
A. Urine
B. Feaces
C. Blood
D. All of themWhich of the following characteristics of bacteria is not true ?
A. Having either DNA or RNA
B. Cell wall containing muramic acid
C. Unicellular
D. Free livingSingle most important laboratory test for determining the virulence of staphylococci is ?
A. Hemolysis of sheep erythrocytes
B. The catalase test
C. Mannitol fermentation
D. Detection of coagulaseWhich of the following have the capability to produce extra cellular polysaccharides ?
A. Peptostreptococcus
B. Enterococcus
C. Strep. pyogenes
D. Strep. MutansTuberculin test screens for ?
A. Complement function
B. Phagocyte dysfunction
C. Cell mediated immunity
D. Hemoral immunityGenetic ability of a bacterium to grow in the presence of several antibiotics is passed in vivo from one bacterium to another by ?
A. Transformation
B. Conjugation
C. Rarefaction
D. TransductionVirulence factors of Neisseria gonorrhea include all of the following except ?
A. IgA Protease
B. Pili
C. Outer membrane proteins
D. M-ProteinsIn a patient with typhoid, diagnosis after 15 days of onset of fever is best done by ?
A. Stool culture
B. Urine culture
C. Widal test
D. Blood cultureStaphylococci typically occur in ?
A. Irregular clusters
B. Tetrads
C. Pairs
D. ChainsOne of the following is an agglutination test in the diagnosis of typhoid ?
A. Mantoux test
B. Wasserman test
C. Widal test
D. Eleks test