41. Selective media for the isolation of Shigella is
A. Hektoen enteric agar
B. Salmonella-Shigella agar
C. Xylose lysine deoxycholate agar
D. All of these
42. The technique(s), used for the assay of a heat-labile enterotoxin produced by Escherichia coli, is/are
A. Steroid production in Yl mouse adrenal cell culture
B. Morphological changes in Chinese hamster ovary
C. Enzyme-linked immunosorbent assay
D. All of these
43. Yersinia enterocolitica and Y. pestis can be differentiated based on which of the following tests?
A. Decarboxylation of ornithine
B. Fermentation of sucrose and cellobiose
C. Motility at 22°C
D. All of these
44. Example of the pathogenic bacteria is/are
A. L biflexa
B. Lparva
C. Leptospira interrogans
D. All of these
45. The media which serve(s) as enrichment media for Salmonella is/are
A. Tetrathionate broth
B. Brilliant green tetrathionate broth
C. Selenite-F broth
D. All of these
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