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Case Reports
. 2020 Sep 6:22:e00952.
doi: 10.1016/j.idcr.2020.e00952. eCollection 2020.

First case report of infective endocarditis associated with Microbacterium maritypicum

Eugene Y H Yeung  1   2   3 , M Fahad Chowdhury  3   4 , Robert W Slinger  1   2
Affiliations
Case Reports

First case report of infective endocarditis associated with Microbacterium maritypicum

Eugene Y H Yeung et al. IDCases. .

Abstract

Microbacterium species are gram positive coryneforms generally considered as a contaminant when identified in gram stain of blood culture, especially when time-to-positivity is longer than 48 h. We encountered a case of infective endocarditis associated with Microbacterium maritypicum bacteremia, which became positive after 48 h of incubation in three out of four bottles. The antimicrobial management is controversial as vancomycin is generally assumed to cover most gram positive bacilli, but our susceptibility result demonstrated minimum inhibitory concentration of 4 μg/mL of vancomycin, indicating non-susceptibility. To the best of our knowledge, this is the first case report of infective endocarditis associated with Microbacterium maritypicum.

Keywords: Antimicrobial susceptibility; Bacteremia; Coryneforms; Diptheroids; Endocarditis; Meropenem; Microbacterium maritypicum; Vancomycin.

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Conflict of interest statement

The authors report no declarations of interest.

Figures

Fig. 1
Fig. 1
(A) Direct gram stain of patient’s blood culture showed gram positive coryneforms (rodlike or clublike shape). (B) After 48 -h incubation, pinpoint and yellow colonies were seen in blood (left) and chocolate agar (right) plates, respectively.
See this image and copyright information in PMC

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