Gram-negative Enterics Quiz

The following are unable to reduce nitrates to nitrites except:

• Erwinia

• Klebsiella

• Photorhabdus

• Xenorhabdus

Motile enterics have peritrichous flagella except:

• Klebsiella

• Shigella

• Tatumella

• Yersinia

Salmonella/Escherichia/Shigella species may look the same under the microscope, but they can be separated into different many serotypes according to the variations of the antigens found on their surface.

• True

• False

An  antigen  found  in  the  flagellum  of motile members

• O

• H

• K

Non-invasive, non-toxigenic, but is able to cause effacement and pedestal formation.

• ETEC

• EPEC

• EHEC

• EIEC

Causes loss of intestinal barrier function through disruption of tight junctions and induces host cell death through apoptosis.

• Intimin

• EspF

• Tir

Which enteric organism is able to produce the cytochrome C oxidase?

• Erwinia

• Pantoea

• Pleisiomonas

• Xenorhabdus

Tags

NGSS.HS-LS1-7

The following are the selective and differential media used for the presumptive identification of enteric organisms, except:

• SBA

• MAC

• EMB

• XLD

Binds to the specific glycolipid called Globotriaosylceramide (Gb3)

• LT (ETEC)

• ST (ETEC)

• Verotoxin 1

• Enteroaggregative heat stable toxin

Infection caused by this strain is described to show watery diarrhea with mucus, blood and leucocytes.

• ETEC

• EIEC

• EPEC

• EHEC