pseudomonas otitidis pseudomonas otitidis pseudomonas otitidis is a gram-negative bacterium that causes otitis. the type strain is atcc baa-1130. pseudomonas otitidis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: pseudomonadaceae genus: pseudomonas species: p. otitidis binomial name pseudomonas otitidisclark, et al. 2006