Which organism, which is oxidase positive, does not grow on TCBS agar, has the ability to decarboxylate lysine and ornithine but cannot utilize arginine, and would have the following co-lonial characteristics on sheep blood agar and MacConkey agar?
a. <-hemolytic and is a nonlactose fermen-ter
b. <-hemolytic and is a lactose fermenter
c. <-hemolytic and is a nonlactose fermen-ter
d. <-hemolytic and is a nonlactose fermenter
A
The organism is Aeromonas veronii biovar veronii. Most pathogenic strains of Aeromonas are <-hemolytic, except Aeromonas caviae, which is usually nonhemolytic. Both lethal factor (LF) and normalized LF (NLF) are found in this group.
You might also like to view...
What metabolism would be favored when there is a lack of electron acceptors?
A) anaerobic fermentation B) anoxygenic photosynthesis C) anoxic ammonia oxidation D) acetogenesis
___________ are the building blocks of DNA.
A. genes B. double helices C. amino acids D. nucleotides E. chromosomes
Polyploidy in plants
A. is very common. B. allows for adaptation to diverse environments. C. may alter the levels of gene expression. D. allows humans to create plants with unusual flowers. E. All of these statements are true regarding polyploidy in plants.
In hydrocarbons, electrons are shared equally in all bonds. Does this suggest that hydrocarbons are soluble or insoluble in polar solvents (such as water)?
a. soluble b. insoluble c. soluble at high temperatures only d. insoluble at high temperatures only