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Volume 4, Issue 5

: an emerging multidrug-resistant opportunistic pathogen in a tertiary care hospital setting Open Access

Abstract

is a rare opportunistic pathogen capable of causing a serious infection in immunocompromised patients. Our objective was to describe all cases of bloodstream infection identified within 2 years at our tertiary care centre, focusing on clinical characteristics, risk factors, antibiotic sensitivity patterns, management and outcomes.

We compiled a descriptive case series including 14 non-duplicate isolates obtained from bloodstream infection samples from the microbiology laboratory of a tertiary care centre from June 2019 to June 2021. All isolates were initially identified based on their morphological properties and biochemical reactions, and then underwent matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) examination for confirmation of identity. Antibiotic susceptibility testing was performed using the Kirby–Bauer disc diffusion method and Vitek 2. All 14 patients presented with symptoms of fever and/or chills, and a positive blood culture for . After 48 h of incubation, no growth was reported from any of the current environmental or pharmaceutical water samples. Chemotherapy (9/14), mechanical ventilation (4/14), steroid use (2/14) and diabetes mellitus (1/14) were associated risk factors in our patients. The antibiotic sensitivity panel showed maximum resistance to aminoglycosides (64.3%) and no resistance to cefoperazone/sulbactum. Patients received treatment with cefoperazone/sulbactum and meropenem or ceftazidime. Thirteen patients recovered with antibiotic therapy and one patient succumbed to his illness.

can cause bloodstream infections in immunocompromised patients. It is likely to be missed or underreported due to lack of clinical awareness. MALDI-TOF MS is helpful in rapid identification. is resistant to many routinely used antibiotics, including carbapenems.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Gram-negative , MALDI-TOF-MS , nosocomial pathogen and Ralstonia mannitolilytica
© 2022 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2022-05-31
2024-12-04
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/content/journal/acmi/10.1099/acmi.0.000367
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Ralstonia mannitolilytica: an emerging multidrug-resistant opportunistic pathogen in a tertiary care hospital setting
Access Microbiology 4, 000367 (2022); https://doi.org/10.1099/acmi.0.000367
/content/journal/acmi/10.1099/acmi.0.000367
/content/journal/acmi/10.1099/acmi.0.000367
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