Respuesta :
Facultatively anaerobic gram-negative rods are found primarily in the intestine of humans. The correct option is C.
What are anaerobic gram-negative rods?
Anaerobic Gram-negative bacilli are widespread in the mucous membrane flora and frequently act as supplementary pathogenic organisms.
They are the most common anaerobes involved in infection, and most antibiotic-resistant species are found among them.
They are generally located in human intestine.
Thus, the correct option is C.
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