Background: To report three cases of nontuberculous mycobacterial (NTM) endophthalmitis following multiple ocular surgeries and to review previous literature in order to study the clinical profile, treatment modalities, and visual outcomes among patients with NTM endophthalmitis.
Methods: Clinical manifestation and management of patients with NTM endophthalmitis in the Department of Ophthalmology, Faculty of Medicine, Siriraj hospital, Mahidol University, Bangkok, Thailand were described. In addition, a review of previously reported cases and case series from MEDLINE was performed. The clinical information and type of NTM from the previous studies and our cases were summarized.
Results: We reported three cases of NTM endophthalmitis caused by M. haemophilum, M. fortuitum and M. abscessus and a summarized review of 95 additional cases previously published. Of 98 patients, there were 85 exogenous endophthalmitis (86.7%) and 13 endogenous endophthalmitis (13.3%). The patients’ age ranged from 13 to 89 years with mean of 61.1±18.7 years with no gender predominance. Exogenous endophthalmitis occurred in both healthy and immunocompromised hosts, mainly caused by cataract surgery (62.4%). In contrast, almost all endogenous endophthalmitis patients were either primary or secondary immunocompromised. Among all patients, previous history of tuberculosis infection was identified in 4 cases (4.1%). Rapid growing NTMs were responsible for exogenous endophthalmitis, while endogenous endophthalmitis were commonly caused by slow growers. Treatment regimens consisted of macrolides, fluoroquinolones or aminoglycosides, which were continued for up to 12 months. Initial and final vision were generally worse than 6/60. There were no significant differences of initial and final vision between exogenous and endogenous causes (p=1.000, 0.446, respectively).
Conclusions: NTM endophthalmitis is a serious intraocular infection that leads to irreversible loss of vision. The presentation can mimic a chronic recurrent or persistent intraocular inflammation. History of multiple intraocular surgeries or immune-deficiency in patient with chronic panuveitis should raise the practioner’s suspicion of NTM endophthalmitis. Appropriate diagnosis and treatment are important to optimize visual outcome.

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On 20 Feb, 2020
On 19 Feb, 2020
On 19 Feb, 2020
On 19 Feb, 2020
On 19 Nov, 2020
On 08 Nov, 2020
On 28 Oct, 2020
On 27 Oct, 2020
On 27 Oct, 2020
On 14 Oct, 2020
On 05 Jul, 2020
On 04 Jul, 2020
On 04 Jul, 2020
Posted 11 May, 2020
On 30 Jun, 2020
Received 20 May, 2020
Invitations sent on 19 May, 2020
On 19 May, 2020
On 27 Apr, 2020
On 26 Apr, 2020
On 26 Apr, 2020
On 27 Mar, 2020
Received 22 Mar, 2020
Received 22 Mar, 2020
On 09 Mar, 2020
On 07 Mar, 2020
On 02 Mar, 2020
Received 02 Mar, 2020
Invitations sent on 01 Mar, 2020
On 20 Feb, 2020
On 19 Feb, 2020
On 19 Feb, 2020
On 19 Feb, 2020
Background: To report three cases of nontuberculous mycobacterial (NTM) endophthalmitis following multiple ocular surgeries and to review previous literature in order to study the clinical profile, treatment modalities, and visual outcomes among patients with NTM endophthalmitis.
Methods: Clinical manifestation and management of patients with NTM endophthalmitis in the Department of Ophthalmology, Faculty of Medicine, Siriraj hospital, Mahidol University, Bangkok, Thailand were described. In addition, a review of previously reported cases and case series from MEDLINE was performed. The clinical information and type of NTM from the previous studies and our cases were summarized.
Results: We reported three cases of NTM endophthalmitis caused by M. haemophilum, M. fortuitum and M. abscessus and a summarized review of 95 additional cases previously published. Of 98 patients, there were 85 exogenous endophthalmitis (86.7%) and 13 endogenous endophthalmitis (13.3%). The patients’ age ranged from 13 to 89 years with mean of 61.1±18.7 years with no gender predominance. Exogenous endophthalmitis occurred in both healthy and immunocompromised hosts, mainly caused by cataract surgery (62.4%). In contrast, almost all endogenous endophthalmitis patients were either primary or secondary immunocompromised. Among all patients, previous history of tuberculosis infection was identified in 4 cases (4.1%). Rapid growing NTMs were responsible for exogenous endophthalmitis, while endogenous endophthalmitis were commonly caused by slow growers. Treatment regimens consisted of macrolides, fluoroquinolones or aminoglycosides, which were continued for up to 12 months. Initial and final vision were generally worse than 6/60. There were no significant differences of initial and final vision between exogenous and endogenous causes (p=1.000, 0.446, respectively).
Conclusions: NTM endophthalmitis is a serious intraocular infection that leads to irreversible loss of vision. The presentation can mimic a chronic recurrent or persistent intraocular inflammation. History of multiple intraocular surgeries or immune-deficiency in patient with chronic panuveitis should raise the practioner’s suspicion of NTM endophthalmitis. Appropriate diagnosis and treatment are important to optimize visual outcome.

Figure 1

Figure 2

Figure 3
This is a list of supplementary files associated with this preprint. Click to download.
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