Question

54. Which type of hemolysis produces a clear zone around the colony?

55. Is Salmonella a coliform?

56. Is Enterobacter a coliform?

57. What does the acronym IMVC stand for when testing the Enterobacteriaceae?

58. Name the one tube test that enable 15 tests of the Enterobacteriaceae.

59. Can nigrosin stain bacteria? What kind of staining can it be used for?

Answer 1

Ans 54 - It is Beta hemolysis because it produces thr clear zone around the colonies

Ans 55 - No

Ans 56 - Yes

Ans 57 - "IMVC" is an acronym for the biochemical test

"I" - indole test

"M" - methyl red test

"V" - Voges-Proskauer test

"C" - citrate test.

Ans 58 - Indole test is one of the tube test fir identification of enterobacteriaceae

Ans 58 - Nigrosin is used to determine the bacterial morphology, it doesn't stains the bacteria. It is used for staining the background of the bacteriw to determine The shapes and sizes. The organism is seen as color-free outlines against the dark background.