Parabacteroides goldsteinii

Parabacteroides goldsteinii is a Gram-negative, obligately anaerobic bacterium belonging to the genus Parabacteroides within the phylum Bacteroidota and family Tannerellaceae. It is a commensal microorganism naturally present in the human gut microbiota and has attracted increasing scientific interests due to its potential roles in metabolic regulation, immune modulation, and host–microbe interactions.

Morphology and Characteristics

P. goldsteinii is a non-spore-forming, non-motile, rod-shaped bacterium. Like other members of the genus, it is strictly anaerobic and thrives in low-oxygen environments such as the gastrointestinal tract^[11]. The bacterium exhibits typical characteristics of Gram-negative cell wall architecture, including an outer membrane containing lipopolysaccharide.

Ecology and Natural Habitat

P. goldsteinii is primarily found in the human gastrointestinal tract, where it exists as part of the normal gut microbiome in healthy individuals. Its abundance may vary depending on factors such as diet, age, metabolic status, and overall gut microbial composition.

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