객관식
Which of the following statements regarding the Salmonella bacterium is correct?
105
views
1. Introduction to Microbiology
Members of the Bacterial World
객관식
Which of the following characteristics is most commonly associated with Escherichia coli in the context of clinical microbiology?
A
Spiral-shaped bacterium responsible for syphilis
B
Gram-positive cocci that forms clusters
C
Acid-fast bacillus that causes tuberculosis
D
Gram-negative rod that ferments lactose
검증된 단계별 안내1
Identify the morphology and staining characteristics of Escherichia coli (E. coli). E. coli is known to be a Gram-negative bacterium, which means it does not retain the crystal violet stain and appears pink/red after Gram staining.
Recognize the shape of E. coli. It is a rod-shaped bacterium (bacillus), not spiral-shaped or cocci (spherical).
Understand the metabolic properties of E. coli. It is a facultative anaerobe that ferments lactose, which is a key biochemical characteristic used in clinical microbiology to differentiate it from other Gram-negative rods.
Compare the options given: Spiral-shaped bacterium responsible for syphilis refers to Treponema pallidum; Gram-positive cocci that form clusters refers to Staphylococcus species; Acid-fast bacillus that causes tuberculosis refers to Mycobacterium tuberculosis.
Conclude that the characteristic most commonly associated with E. coli in clinical microbiology is that it is a Gram-negative rod that ferments lactose.
관련 영상
관련 실천
