Moraxella pluranimalium

Moraxella pluranimalium is a Gram-negative, aerobic, catalase- and oxidase-positive, non-spore-forming bacterium in the genus Moraxella. It was originally isolated from the nasal turbinate of a pig in Spain.^[1][2]

Moraxella pluranimalium
Scientific classification
Domain:	Bacteria
Kingdom:	Pseudomonadati
Phylum:	Pseudomonadota
Class:	Gammaproteobacteria
Order:	Pseudomonadales
Family:	Moraxellaceae
Genus:	Moraxella
Species:	M. pluranimalium
Binomial name
Moraxella pluranimalium Vela et al. 2009[1]
Type strain
CCUG 54913, CECT 7295, strain 248-01

Etymology

The species name pluranimalium is derived from the Latin pluri- (many) and animalium (of animals), referring to its isolation from multiple animal species.^[1]

Antimicrobial resistance

In a survey of bacteria from healthy pigs in Great Britain (2014–2015), one isolate of M. pluranimalium was found to carry the chromosomally-encoded mcr-6.1 gene, a variant of the colistin resistance determinant. Phenotypic testing showed reduced susceptibility to colistin. ^[3]

The type strain (248-01) has been shown to harbor the chromosomal gene mcr-2.2, a close variant of mcr-2, conferring high-level resistance to colistin (MIC 16 mg/L).^[4] This strain is considered a likely natural source of mcr-2-type genes before their mobilization into plasmids circulating in Enterobacteriaceae.