[6] However, in 1962, a review article by Ewing reported that M. columbensis had been re-identified as Escherichia coli, thereby removing that organism from the genus Morganella.

Patients in whom bacteremia develops are typically immunocompromised, diabetic, or elderly, or have at least one serious underlying disease.

[citation needed] M. morganii has been regarded as a normally harmless opportunistic pathogen, but some strains carry "antibiotic-resistant plasmids" and have been associated with nosocomial outbreaks of infections.

[10] Several reports indicate M. morganii causes sepsis, ecthyma, endophthalmitis, and chorioamnionitis, and more commonly urinary tract infections, soft tissue infections, septic arthritis, meningitis, and bacteremia, in the latter 2 cases with frequent fatal consequences.

[11] In a rare case published in 2003, a patient presented with bilateral necrosis of both upper and lower eyelids.

[12] Treatment of M. morganii infections may include:[citation needed] A study conducted at the University Hospital at Heraklion, Crete, Greece, showed a 92% success rate in the use of these antibiotics.

[13] However, some M. morganii strains are resistant to penicillin, ampicillin/sulbactam, oxacillin, first-generation and second-generation cephalosporins, macrolides, lincosamides, fosfomycin, colistin, and polymyxin B.

[3] Polymicrobial infections are most abundantly caused by this microbe which additionally damages the skin, soft tissues, and urogenital tract; these can be cured through use of the aforementioned antibiotics.