Which organism is described as obligately anaerobic gram-positive cocci?

Which organism is described as obligately anaerobic gram-positive cocci?

• A. Capnocytophaga
• B. Propionibacterium
• C. Peptostreptococcus
• D. Veillonella

Answer: (C)

Organisms that are Gram-positive cocci and must live in the absence of oxygen are Peptostreptococcus. These bacteria appear as Gram-positive cocci and are obligate anaerobes, meaning they only grow without oxygen. They are part of the normal oral, gastrointestinal, and genitourinary flora and are often involved in polymicrobial anaerobic infections. Capnocytophaga is a Gram-negative rod that loves CO2-rich conditions, not Gram-positive cocci. Veillonella are Gram-negative cocci that are anaerobic. Propionibacterium (Cutibacterium) are Gram-positive rods, not cocci. Thus, Peptostreptococcus best fits the description.

Organisms that are Gram-positive cocci and must live in the absence of oxygen are Peptostreptococcus. These bacteria appear as Gram-positive cocci and are obligate anaerobes, meaning they only grow without oxygen. They are part of the normal oral, gastrointestinal, and genitourinary flora and are often involved in polymicrobial anaerobic infections.

Capnocytophaga is a Gram-negative rod that loves CO2-rich conditions, not Gram-positive cocci. Veillonella are Gram-negative cocci that are anaerobic. Propionibacterium (Cutibacterium) are Gram-positive rods, not cocci. Thus, Peptostreptococcus best fits the description.