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Lysinibacillus Massiliensis Isolated from the Synovial Fluid: a Case Report

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Lysinibacillus Massiliensis Isolated from the Synovial Fluid: a Case Report CASE REPORT/OLGU SUNUMU flora FLORA 2020;25(4):595-598 • doi: 10.5578/flora.70014 Lysinibacillus massiliensis Isolated from the Synovial Fluid: A Case Report Sinoviyal Sıvıdan İzole Edilen Lysinibacillus massiliensis: Olgu Sunumu Canan ERYILDIZ1(İD), Kıymet TABAKÇIOĞLU2(İD), Sezgin KEHAYA3(İD), Nermin ŞAKRU1(İD), Şaban GÜRCAN1(İD) 1 Department of Medical Microbiology, School of Medicine, Trakya University, Edirne, Turkey 2 Department of Medical Biology, School of Medicine, Trakya University, Edirne, Turkey 3 Department of Neurology, School of Medicine, Trakya University, Edirne, Turkey Cite this article as: Eryıldız C, Tabakçıoğlu K, Kehaya S, Şakru N, Gürcan Ş. Lysinibacillus massiliensis isolated from the synovial fluid: a case report. FLORA 2020;25(4):595-8. ABSTRACT Lysinibacillus massiliensis is an aerobic, endospore-forming, gram-negative staining bacterium with peritrichous flagella belonging to the Bacillaceae family. A few cases of L. massiliensis isolated from the cerebrospinal fluid and tissue have been reported. In this study, we aimed to describe a case of L. massiliensis isolated from the synovial fluid. The synovial fluid from a 74-year-old female patient was inoculated into blood culture bottle. Gram-negative rods were observed in a gram-stained smear from a positive blood culture bottle. The bacterium was identified as Lysinibacillus sphaericus/Lysinibacillus fusiformis, with a probability of 89% using an automated bacte- rial identification system (VITEK2; Biomerieux, France). Subsequently, 16S rRNA gene sequencing was performed, and the sequence was analyzed using the Basic Local Alignment Search Tool. The sequence had 99.9% (1426/1427) identity with the strain L. massiliensis (GenBank ID: NR_043092.1). To our knowledge, this is the first reported case of L. massiliensis isolated from the synovial fluid. When an endospore-forming gram-negative staining bacterium can not be identified by phenotypic characterization, L. massiliensis should be considered, and different microbiological methods should be used for identification. Key Words: Lysinibacillus massiliensis; Synovial fluid; 16S rRNA gene sequencing Received/Geliş Tarihi: 28/02/2020 - Accepted/Kabul Ediliş Tarihi: 01/09/2020 ©Copyright 2020 by Flora. Available on-line at www.floradergisi.org. 595 Available Online Date: 31.12.2020 Lysinibacillus massiliensis Isolated from the Synovial Fluid: A Case Report ÖZ Sinoviyal Sıvıdan İzole Edilen Lysinibacillus massiliensis: Olgu Sunumu Canan ERYILDIZ1, Kıymet TABAKÇIOĞLU2, Sezgin KEHAYA3, Nermin ŞAKRU1, Şaban GÜRCAN1 1 Trakya Üniversitesi Tıp Fakültesi, Tıbbi Mikrobiyoloji Anabilim Dalı, Edirne, Türkiye 2 Trakya Üniversitesi Tıp Fakültesi, Tıbbi Biyoloji Anabilim Dalı, Edirne, Türkiye 3 Trakya Üniversitesi Tıp Fakültesi, Nöroloji Anabilim Dalı, Edirne, Türkiye Lysinibacillus massiliensis aerobik, endospor oluşturan, gram-negatif boyanan, peritrik flajellaya sahip, Bacillaceae ailesine ait bir bak- teridir. Bakterinin serebrospinal sıvı ve dokudan izole edildiği az sayıda olgu rapor edilmiştir. Bu çalışmada sinoviyal sıvıdan L. massilien- sis’in izole edildiği bir olgu sunulmaktadır. 74 yaşında kadın hastanın kan kültür şişesine ekilen sinoviyal sıvısında gram-negatif boyanan bakteriler görülmüştür. Bakteri VITEK2 (Biomerieux, Fransa) bakteri tanımlama sistemi ile %89 olasılıkla Lysinibacillus sphaericus/ Lysinibacillus fusiformis olarak isimlendirilmiştir. Bakterinin 16S rRNA gen dizi analizi yapılmış ve elde edilen dizi “Basic Local Alignment Search Tool” ile analiz edilmiştir. Dizinin %99.9 (1426/1427) oranında Lysinibacillus massiliensis (GenBank ID: NR_043092.1) suşu ile benzerlik gösterdiği saptanmıştır. Bildiğimiz kadarıyla bu olgu literatürde, sinoviyal sıvıdan L. massiliensis’in izole edildiği ilk olgudur. Endospor oluşturan ve gram-negatif boyanan bir bakteri fenotipik yöntemlerle isimlendirilemediğinde L. massiliensis akla getirilmeli ve tanımlamada farklı mikrobiyolojik yöntemler kullanılmalıdır. Anahtar Kelimeler: Lysinibacillus massiliensis; Sinoviyal sıvı; 16S rRNA gen dizileme INTRODUCTION clinic. The patient had Wallenberg syndrome, a Lysinibacillus species are environmental bac- history of gout, chronic renal failure, and hyper- teria that belong to the Bacillaceae family[1,2]. tension. She had no immunosuppressive disease Although most members of the Bacillaceae family or drug use. On the third day of hospitalization, stain gram-positive, some species of the family the patient complained of swollen knees, pain, stain gram variable or gram-negative[3]. Glazunova and limitations of joint range of motion. Physical et al. have previously isolated a bacterium from examination revealed pain, a slightly elevated a sample of the cerebrospinal fluid and identified local temperature, and suprapatellar swelling on it as aerobic, with peritrichous flagella and en- the left knee. Ultrasonography showed suprapa- dospore-forming gram-negative staining rod. The tellar bursitis. Routine laboratory analyzes revealed 3 bacterium was included in the Bacillus sphaeri- white blood cell count of 14,400 cells/mm (refe- 3 cus-like group and named Bacillus massiliensis (B. rence range: 3,980-10,040 cells/mm ) and C-re- massiliensis) based on 16S rRNA gene sequence active protein of 8.28 mg/dL (reference range: analysis and phenotypic characteristics[4]. B. mas- 0-0.8 mg/dL). The synovial fluid was sent to the siliensis was later included in the Lysinibacillus microbiology laboratory for culture. Subsequently, genus and renamed Lysinibacillus massiliensis (L. ampicillin-sulbactam therapy (1.5 g/6 h, IV) was massiliensis) on the basis of DNA-DNA hybridiza- started empirically. In the microbiological analy- 3 tions and phenotypic tests[5]. A few human cases zes, 6,400 cells/mm and 95% polymorphonucle- of L. massiliensis have been reported, where the ar leukocytes were observed in the synovial fluid. bacterium was isolated from the cerebrospinal The synovial fluid was inoculated into a BacT/ fluid and tissue[4,6]. To our knowledge, this is ALERT bottle and incubated in a BacT/ALERT the first reported case of L. massiliensis isolated 3D microbial detection system (Biomerieux, Fran- from the synovial fluid. ce). A positive signal was detected on the second day of culture. Gram-negative rods were observed CASE REPORT in a gram-stained smear from a positive blood A 74-year-old female patient with cerebro- culture bottle. Antimicrobial therapy was changed vascular disease was admitted to the neurology to piperacillin-tazobactam (2.25 g/6 h, IV). On 596 FLORA 2020;25(4):595-598 Eryıldız C, Tabakçıoğlu K, Kehaya S, Şakru N, Gürcan Ş. the 10th day of antibiotic use, the patient had culture from a patient who had received an auto- stable vital findings and was discharged, with the logous, adipose-derived stem cell injection to the advice to return for a follow-up visit. The bac- perianal region. The bacterium was identified as terium was identified as Lysinibacillus sphaericus/ Lysinibacillus massiliensis by phenotypic characte- Lysinibacillus fusiformis, with a probability of 89% rization and 16S rDNA sequencing[6]. using an automated bacterial identification system In the present case, clinical findings, leuko- (VITEK2; Biomerieux, France). Minimum inhibi- cytosis, and increased C-reactive protein were tory concentration values for penicillin, levofloxa- indicative of a pyogenic infection. However, the cin, vancomycin and clindamycin were detected low number of cells in the synovial fluid was not as 0.064 µg/mL, 0.5 µg/mL, 0.094 µg/mL and compatible with bacterial infection. Blood culture 0.5 µg/mL by gradient strip test (Biomerieux, was not taken from the patient. Nevertheless, the France). A bacterial DNA sample was isolated bacterium was isolated from a region that should from the microbial culture using a commercial kit be sterile, and the patient responded to antimic- (PureLink Genomic DNA Mini Kit; ThermoFisher robial treatment. Considering the clinical status of Scientific, USA) according to the manufacturer’s the patient, chronic renal failure was thought to protocol. Polymerase chain reaction (PCR) of the be the most likely risk factor. However, Lysiniba- 16S rRNA gene was performed using universal cillus species were found in environmental habitats [7] primers fD1 and rP2 . The PCR products were such as soil and surface water. Moreover, the purified using a commercial kit (PureLink PCR bacteria were isolated from air sample collected Purification Kit; ThermoFisher Scientific, USA), from a medical practice room[2,8]. Consequently, and sequencing PCR was carried out using an the possibility that the isolate in the present case Applied Biosystems BigDye Terminator v3.1 Cyc- was a contaminant can not be excluded. le Sequencing Kit (ThermoFisher Scientific, USA). Capillary electrophoresis was conducted on an In microbiology laboratories, it is necessary Applied Biosystems 3500 Series Genetic Analyzer to use different methods for the identification (ThermoFisher Scientific, USA). Raw data were of bacteria that are rarely isolated and can not aligned by ProSeq v2.9 and analyzed using Bi- be identified by phenotypic methods. For these purposes, 16S rRNA gene sequence analysis is oEdit software. As a result of the alignments, a [9-11] 1.427 bp-long sequence was obtained. The sequ- very useful in such cases . When an en- ence was analyzed using the Basic Local Alig- dospore-forming gram-negative staining bacterium nment Search Tool. The sequence had 99.9% can not be identified by phenotypic methods, L. should be considered,
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