A novel characterized multi-drug-resistant Pseudocitrobacter sp. isolated from a patient colonized while admitted to a tertiary teaching hospital

A novel bacterial species was isolated from a patient’s rectal swab, revealing 99.7% 16s rRNA identity to Pseudocitrobacter corydidari, an Asian cockroach-associated species. The isolate had the highest average nucleotide identity (ANI) at 0.9562, suggesting resistance to carbapenems, β-lactams, sulfonamides, fluoroquinolones, macrolides, aminoglycosides, and cephalosporins. The patient was colonized, not infected, and did not require antimicrobial treatment. Genome data for this new species have been submitted to GENBANK using the proposed nomenclature Pseudocitrobacter limerickensis.