The image provided is a depiction of the bacterium Neisseria meningitidis. To identify this bacterium, consider several distinguishing features:
Shape and Arrangement:Neisseria meningitidis is a Gram-negative bacterium appearing as a diplococcus (pairs of cocci). This arrangement is typical for bacteria in the Neisseria genus.
Cell Wall Composition: As a Gram-negative organism, it has a thin peptidoglycan layer and an outer membrane containing lipopolysaccharides.
Virulence Factors:Neisseria meningitidis is notable for its polysaccharide capsule which aids in evading the host's immune response.
Cultural Characteristics: It grows on selective media such as Thayer-Martin agar and requires a carbon dioxide-enriched atmosphere.
Disease Association: This bacterium is a significant cause of bacterial meningitis and can lead to other serious infections such as septicemia.
Given these characteristics and the options provided, the correct identification for the bacterium in the image is Neisseria meningitidis.
