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Yukawa S, Noguchi T, Shinohara K, Tsuchido Y, Yamamoto M, Matsumura Y, Nagao M. Characteristics and outcomes in adult patients with Staphylococcus lugdunensis bacteremia compared to patients with Staphylococcus epidermidis and Staphylococcus aureus bacteremia: a retrospective study in a 16-year period at the university hospital, Japan. BMC Infect Dis 2023; 23:269. [PMID: 37127589 PMCID: PMC10150470 DOI: 10.1186/s12879-023-08233-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023] Open
Abstract
BACKGROUND Staphyococcus lugudnensis (S. lugdunensis) is one of coagulase-negative Staphylococcus species with a potential to cause invasive infections. Few studies have evaluated the characteristics and outcomes of patients with S. lugdunensis bacteremia (SLB) compared with those of patients with Staphylococcus epidermidis (S. epidermidis) and Staphylococcus aureus (S. aureus) bacteremia. METHODS We performed a single-center retrospective case-control study of patients aged ≥ 18 who had SLB with at least two sets of positive blood cultures at the Kyoto University Hospital, Japan, from January 2005 to June 2022. Patients who had S. epidermidis bacteremia (SEB) with at least two sets of positive blood cultures and those who had S. aureus bacteremia (SAB) with at least one set of positive blood cultures were randomly selected in a 1:5:5 (SLB:SEB:SAB) ratio. RESULTS A total of 22 patients with SLB, 110 patients with SEB, and 110 patients with SAB were included. The proportions of infective endocarditis (IE) and metastatic infections were statistically higher in the SLB group than in the SEB group (14% vs. 2%, p < 0.01 and 18% vs. 5%, p 0.02, respectively) and were not significantly different between the SLB and SAB groups (14% vs. 5%, p 0.16 and 18% vs. 16%, p 0.78, respectively). The seven-day mortality was higher in the SLB group than in the SEB group (9% vs. 1%, p 0.02) and similar between the SLB and SAB groups (9% vs. 7%, p 0.77). CONCLUSIONS The clinical course and outcome of SLB were worse than those of SEB and similar to those of SAB. Appropriate evaluation and treatment for SAB may be warranted in patients with SLB.
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Affiliation(s)
- Satomi Yukawa
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan.
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan.
| | - Taro Noguchi
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Koh Shinohara
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yasuhiro Tsuchido
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masaki Yamamoto
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yasufumi Matsumura
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Miki Nagao
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin Kawahara-Cho, Sakyo-Ku, Kyoto, Postal Code 6068507, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Identification of New Drug Target in Staphylococcus lugdunensis by Subtractive Genomics Analysis and Their Inhibitors through Molecular Docking and Molecular Dynamic Simulation Studies. Bioengineering (Basel) 2022; 9:bioengineering9090451. [PMID: 36134997 PMCID: PMC9496018 DOI: 10.3390/bioengineering9090451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/29/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022] Open
Abstract
Staphylococcus lugdunensis is a coagulase-negative, Gram-positive, and human pathogenic bacteria. S. lugdunensis is the causative agent of diseases, such as native and prosthetic valve endocarditis, meningitis, septic arthritis, skin abscesses, brain abscess, breast abscesses, spondylodiscitis, post-surgical wound infections, bacteremia, and peritonitis. S. lugdunensis displays resistance to beta-lactam antibiotics due to the production of beta-lactamases. This study aimed to identify potential novel essential, human non-homologous, and non-gut flora drug targets in the S. lugdunensis strain N920143, and to evaluate the potential inhibitors of drug targets. The method was concerned with a homology search between the host and the pathogen proteome. Various tools, including the DEG (database of essential genes) for the essentiality of proteins, the KEGG for pathways analysis, CELLO V.2.5 for cellular localization prediction, and the drug bank database for predicting the druggability potential of proteins, were used. Furthermore, a similarity search with gut flora proteins was performed. A DNA-binding response-regulator protein was identified as a novel drug target against the N920143 strain of S. lugdunensis. The three-dimensional structure of the drug target was modelled and validated with the help of online tools. Furthermore, ten thousand drug-like compounds were retrieved from the ZINC15 database. The molecular docking approach for the DNA-binding response-regulator protein identified ZINC000020192004 and ZINC000020530348 as the most favorable compounds to interact with the active site residues of the drug target. These two compounds were subjected to an MD simulation study. Our analysis revealed that the identified compounds revealed more stable behavior when bound to the drug target DNA-binding response-regulator protein than the apostate.
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Complete genome sequence of a methicillin-resistant Staphylococcus lugdunensis strain and characteristics of its staphylococcal cassette chromosome mec. Sci Rep 2020; 10:8682. [PMID: 32457307 PMCID: PMC7251135 DOI: 10.1038/s41598-020-65632-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 05/04/2020] [Indexed: 01/19/2023] Open
Abstract
Symptoms of Staphylococcus lugdunensis infection are often similar to those of Staphylococcus aureus infection, including skin and soft-tissue lesions, bacteremia and infective endocarditis. Despite the severity of these infections, S. lugdunensis is regarded as a less important pathogen than drug-resistant S. aureus. To investigate its ability to cause infectious diseases, a methicillin-resistant S. lugdunensis (MRSL) strain JICS135 was isolated from a patient with bacteremia and subjected to whole genome sequencing. Similar to most strains of methicillin-resistant S. aureus (MRSA), this MRSL strain possessed the staphylococcal cassette chromosome mec (SCCmec) located close to the origin of replication. However, the SCCmec in this MRSL strain, with three ccr complexes, was structurally unique and currently untypable. Moreover, the SCCmec of this MRSL strain was found to carry two genes encoding microbial surface components recognizing adhesive matrix molecules (MSCRAMM)-like proteins accompanied by glycosyl transferases, one of which may have been derived from S. aureus and the other from S. epidermidis, indicating that this MRSL evolved to carry virulence factors from other staphylococci. The emergence of this strain, the first MRSL strain whose genome has been sequenced completely, may be of public concern.
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Tagliaferri TL, Vieira CD, de Carvalho MAR, Ladeira LCD, Magalhães PP, de Macêdo Farias L, Dos Santos SG. Phenotypic and genotypic characterization of clinically relevant bacteria isolated from dental waste and waste workers' hands, mucosas and coats. Lett Appl Microbiol 2017; 65:306-312. [PMID: 28712134 DOI: 10.1111/lam.12775] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 07/05/2017] [Accepted: 07/06/2017] [Indexed: 12/14/2022]
Abstract
Infectious wastes are potential sources of pathogenic micro-organisms, which may represent a risk to the professionals who manage them. In this study, we aimed to characterize the infectious bacteria present in dental waste and waste workers. The dental waste produced over 24 h was collected and waste workers were sampled by swabbing. Isolate resistance profiles were characterized by Vitek® and PCR and biofilm formation by Congo Red agar, string test and microtitre assay. To assess similarity between the waste and the workers' samples, a random amplified polymorphic DNA test was used. Twenty-eight bacteria were identified as clinically relevant. The most frequent gene was blaTEM present in five Gram-negative micro-organisms, and one blaSHV in Klebsiella pneumoniae. All Pseudomonas aeruginosa were positive to extracellular polymeric substances formation, except one isolated from a worker. Klebsiella pneumoniae had negative results for the string test. Pseudomonas aeruginosa showed better adherence at 25°C after 48 h of incubation and K. pneumonia had the best biofilm formation at the same temperature, after 24 h. The similarity between P. aeruginosa recovered from dental waste and from workers was low, however, it is important to note that a pathogen was found on a worker's hands and that improvements in biosafety are required. SIGNIFICANCE AND IMPACT OF THE STUDY Infectious dental waste can contain clinically relevant bacteria with important resistance and biofilm profiles. These micro-organisms could be transmitted to waste workers, other professionals and patients if the principles of biosafety measures are neglected. To our knowledge, no study has ever evaluated the microbial characterization and the potential contamination risk of dental infectious waste and waste handlers. The presence of clinically relevant bacteria in the hands and nasal mucosa of waste workers highlights the need for studies in this field to clarify the risk of these pathogens in dental healthcare services, and to stress the need for an efficient waste management.
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Affiliation(s)
- T L Tagliaferri
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - C D Vieira
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - M A R de Carvalho
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - L C D Ladeira
- Nuclear Technology Development Center (CDTN), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - P P Magalhães
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - L de Macêdo Farias
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - S G Dos Santos
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Al-Jumaili AA, Hussein AH, Al-Rekabi MD, Raheem SA, Ernst EJ. Antimicrobial utilization in an Iraqi province: a comprehensive evaluation of antibiotic source and cost. INTERNATIONAL JOURNAL OF PHARMACY PRACTICE 2017; 25:81-88. [PMID: 28097722 DOI: 10.1111/ijpp.12338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 11/26/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE The aims were to calculate total systemic antibiotic consumption and cost in both public and private sectors in all care settings in Al-Najaf province, Iraq, during 2012, recognize the percentage of each pharmacological class for the dispensed antibiotics and identify oral and parenteral antibiotic percentages dispensed and the portions manufactured nationally and imported. METHODS Cross-sectional study was conducted in Al-Najaf to calculate the total cost and quantities of antibiotics consumed during 2012 using World Health Organization Guidelines for Defined Daily Dose (DDD). KEY FINDINGS The results showed more than 21 million DDDs were dispensed in Al-Najaf in one year, and more than half (54.2%) were dispensed by governmental healthcare institutions. A thousand inhabitants in the province consumed 45.26 DDDs per day. Extended-spectrum (34.49%) and combined penicillins (26.08%) were the most frequently consumed while meropenem was the least frequently consumed (0.02%). Ninety-five per cent of the consumed antibiotics were oral dosage forms, and five per cent were parenteral dosage forms. The total cost of antibiotic consumed was more than nine million U.S dollars. CONCLUSIONS The antibiotic consumption ratio in this province was comparable to neighbouring countries, but far higher compared to European countries. Penicillins, cephalosporins and quinolones were the most popular antibiotics. Around half of the antibiotics consumed were made by national pharmaceutical companies that mainly produce oral antibiotics. The public sector consumed a higher portion, but spent a lower amount compared to private sectors. This is the first time report of antibiotic consumption in Iraq. More studies evaluating antibiotic consumption can improve utilization.
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Affiliation(s)
- Ali A Al-Jumaili
- Pharmacy Practice and Science Department, University of Iowa College of Pharmacy, Iowa City, IA, USA
| | - Ahmed H Hussein
- Faculty of Pharmacy, Humanity Studies University College, Al-Najaf, Iraq
| | | | | | - Erika J Ernst
- Pharmacy Practice and Science Department, University of Iowa College of Pharmacy, Iowa City, IA, USA
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