Oetons 41 threagh 47 reers to the case stedy below results Case Stuudyr TweMand
ID: 272413 • Letter: O
Question
Oetons 41 threagh 47 reers to the case stedy below results Case Stuudyr TweMand N rom a fecal sample gave the Bollowbs 4z M Hektoeo eoteric agar This ess that the organism M is Glucose formenber C Mannitol fermeuher 42 N produced peenish-blue colonies on Hektoen. This means that N is A Lactose fermenter B. Glucose fermenter C. Mannitol fermenter Non-glucose fermenter 43. IfM was also incubated in MacConkey agar, it would be expected to produce Smooth colorless colonies B) Reddish mucoid colonies D. Bright orange pigmented colonies 44. N also produced a red color on the slant side of Kligler's Iron agar slant and yellow color at the bottom. confirms that bacteria N is Lactose fermenter and glucose fermenter Lactose fermenter but non-fermenter of glucose A. Non-fermenter of both lactose and glucose None of the above D. E. 45. N also produced a pink coloration after incubation in Urease agar slant. This means that N is B. positive for hydrogen sulfide production C. positive for indole production D positive for urease activity E. positive for motility F. positive for methyl red test 46. After incubation in SIM medium, N produced dark dispersed precipitate. This means that N is positive for hydrogen sulfide production . positive for motility . positive for indole production N. positive for urease production both A and B are correctExplanation / Answer
41.Ans- A. lactose fermenter
Explanation:
Hektoen Enteric Agar differential medium consists of lactose, sucrose, and salicin and the dyes bromthymol blue and acid fuchsin. Gram negatives lactose fermenter produce yellow to salmon to neon orange colored colonies after incubation.
42. Ans-E.non-lactose fermenter
Explanation:
Blue-green colonies are produced by lactose non-fermenters on Hektoen medium.
43. Ans-B.reddish mucoid colonies
MacConkey Agar is used for isolating and differentiating of non-fastidious gram-negative rods, Enterobacteriaceae family, and Pseudomonas genus. Lactose-fermenting bacteria produce red or pink mucoid colonies due to the production of acid from lactose and lactose non-fermenting bacteria such as Shigella and Salmonella produced colorless and transparent colonies on this medium.
44. Ans-C. glucose fermenter but non-fermenter of lactose
Explanation:
Kligler’s Iron agar medium is used to differentiate gram-negative enteric bacteria where non-lactose fermenters initially produce a yellow slant and butt during dextrose fermentation and lactose fermenting bacteria produce yellow slants and butts.
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