« previous next »

Author Question: A dark pigmented colony is isolated from the leg wound of a fisherman from Florida. The ... (Read 151 times)

Caiter2013

  • Hero Member
  • *****
  • Posts: 607
on: Jun 25, 2018
A dark pigmented colony is isolated from the leg wound of a fisherman from Florida. The gram-negative rod grows on sheep blood and MacConkey agars. The organism provides the following reactions:
 
  TSI: K/A Indole: no color change Lysine: no color change
   1 NaCL: no growth Arginine: purple Ornithine: no color change
   DNase: pink halo around the area of organism inoculum
  The microbiologist cannot read the oxidase reaction due to the dark pigment. What can he do to help achieve a valid oxidase reaction?
  A) Grow the organism under anaerobic conditions and retest
  B) Grow the organism on a non-nutrient agar and retest
  C) The oxidase test is not necessary for the identification of this organism
  D) Perform a modified oxidase test

Question 2

A microbiologist sets up a set of decarboxylase tubes for identification of a glucose fermenting, gram-negative rod.
 
  After 24 hours, the tubes reveal
  Base control: gray
  Arginine: purple
  Lysine: yellow
  Ornithine: purple
 
  These tubes should be interpreted as
  A) all positive. B) positive for arginine and ornithine.
  C) invalid. D) positive for lysine.


kaykay69

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jun 25, 2018
Answer to Question 1

A

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Caiter2013

  • Hero Member
  • *****
  • Posts: 607
Reply #2 on: Jun 25, 2018
Correct answers!


kaykay69

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jun 25, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Growth of a bacterial colony. Growth of a bacterial colony.
Pigmented bands in nail of patient with dark skin Pigmented bands in nail of patient with dark skin
To cleanse an open wound, begin close to the wound and work outward in full or half circles. To cleanse an open wound, begin close to the wound and work outward in full or half circles.
A wire wound electrical heater is used to warm the intake air on some diesel engines A wire wound electrical heater is used to warm the intake air on some diesel engines
Cannons - Footsteps In The Dark (The Isley Brothers Cover) Cannons - Footsteps In The Dark (The Isley Brothers Cover)
Let A ⊆ R and p ∈ A. Suppose A\{p}6= ∅. Prove that p is an isolated point of A if and ... Let A ⊆ R and p ∈ A. Suppose A\{p}6= ∅. Prove that p is an isolated point of A if and ...
Video: Muscle Twitch and Muscle Tension - Motor unit size and force

For a complete list of videos, visit our video library