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Sharma DK, Rajpurohit YS. Multitasking functions of bacterial extracellular DNA in biofilms. J Bacteriol 2024; 206:e0000624. [PMID: 38445859 PMCID: PMC11025335 DOI: 10.1128/jb.00006-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024] Open
Abstract
Bacterial biofilms are intricate ecosystems of microbial communities that adhere to various surfaces and are enveloped by an extracellular matrix composed of polymeric substances. Within the context of bacterial biofilms, extracellular DNA (eDNA) originates from cell lysis or is actively secreted, where it exerts a significant influence on the formation, stability, and resistance of biofilms to environmental stressors. The exploration of eDNA within bacterial biofilms holds paramount importance in research, with far-reaching implications for both human health and the environment. An enhanced understanding of the functions of eDNA in biofilm formation and antibiotic resistance could inspire the development of strategies to combat biofilm-related infections and improve the management of antibiotic resistance. This comprehensive review encapsulates the latest discoveries concerning eDNA, encompassing its origins, functions within bacterial biofilms, and significance in bacterial pathogenesis.
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Affiliation(s)
- Dhirendra Kumar Sharma
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai, India
- Schools of Life Sciences, Homi Bhabha National Institute (DAE—Deemed University), Mumbai, India
| | - Yogendra Singh Rajpurohit
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai, India
- Schools of Life Sciences, Homi Bhabha National Institute (DAE—Deemed University), Mumbai, India
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2
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Kolodkin-Gal I, Dash O, Rak R. Probiotic cultivated meat: bacterial-based scaffolds and products to improve cultivated meat. Trends Biotechnol 2024; 42:269-281. [PMID: 37805297 DOI: 10.1016/j.tibtech.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 10/09/2023]
Abstract
Cultivated meat is emerging to replace traditional livestock industries, which have ecological costs, including land and water overuse and considerable carbon emissions. During cultivated meat production, mammalian cells can increase their numbers dramatically through self-renewal/proliferation and transform into mature cells, such as muscle or fat cells, through maturation/differentiation. Here, we address opportunities for introducing probiotic bacteria into the cultivated meat industry, including using them to produce renewable antimicrobials and scaffolding materials. We also offer solutions to challenges, including the growth of bacteria and mammalian cells, the effect of probiotic bacteria on production costs, and the effect of bacteria and their products on texture and taste. Our summary provides a promising framework for applying microbial composites in the cultivated meat industry.
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Affiliation(s)
- Ilana Kolodkin-Gal
- Scojen Institute for Synthetic Biology, Reichman University, Herzliya, Israel.
| | - Orit Dash
- Department of Animal Sciences, Faculty of Agriculture and Environmental Sciences, The Hebrew University of Jerusalem, Rehovot, Israel; Institute of Animal Science, ARO, The Volcani Center, Rishon LeZion, Israel
| | - Roni Rak
- Institute of Animal Science, ARO, The Volcani Center, Rishon LeZion, Israel.
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González J, Hernandez L, Tabera A, Bustamante AV, Sanso AM. Methicillin-Resistant Staphylococcus aureus and Coagulase-Negative Staphylococcus from School Dining Rooms in Argentina. Foodborne Pathog Dis 2024; 21:44-51. [PMID: 37855916 DOI: 10.1089/fpd.2023.0071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) constitutes an important cause for concern in the field of public health, and the role of the food chain in the transmission of this pathogen and in antimicrobial resistance (AMR) has not yet been defined. The objectives of this work were to isolate and characterize coagulase-positive Staphylococcus (CoPS) and coagulase-negative Staphylococcus (CoNS), particularly S. aureus, from school dining rooms located in Argentina. From 95 samples that were obtained from handlers, inert surfaces, food, and air in 10 establishments, 30 Staphylococcus strains were isolated. Four isolates were S. aureus, and the remaining ones (N = 26) belonged to 11 coagulase-negative species (CoNS). The isolates were tested for susceptibility to nine antibiotics. The presence of genes encoding toxins (luk-PV, sea, seb, sec, sed, and see), adhesins (icaA, icaD), and genes that confer resistance to methicillin (mecA) and vancomycin (vanA) was investigated. The resistance rates measured for penicillin, cefoxitin, gentamicin, vancomycin, erythromycin, clindamycin, levofloxacin, trimethoprim-sulfamethoxazole, and tetracycline were 73%, 30%, 13%, 3%, 33%, 17%, 13%, 7%, and 7% of the isolates, respectively. Seventeen AMR profiles were detected, and 11 isolates were multidrug resistant (MDR). Seven methicillin-resistant Staphylococcus isolates were detected in the hands of handlers from four establishments, two of them were MRSA. Two S. aureus isolates presented icaA and icaD, another one, only icaD. The gene vanA was found in two isolates. In relation to S. aureus, resistance to vancomycin but not to gentamicin was detected. School feeding plays a key role in the nutrition of children, and the consumption of food contaminated with MRSA and vancomycin-resistant S. aureus (VRSA) can be a serious threat to health. In particular, it was detected that the handlers were the source of MRSA, VRSA, MR-CoNS (methicillin-resistant coagulase-negative Staphylococcus), and MDR isolates. The results obtained indicate that the vigilance of this pathogen in school dining rooms should be extreme.
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Affiliation(s)
- Juliana González
- Laboratorio de Inmunoquímica y Biotecnología, Centro de Investigación Veterinaria de Tandil (CIVETAN), CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Buenos Aires, Argentina
- Laboratorio de Microbiología de los Alimentos, Departamento de Tecnología y Calidad de los Alimentos, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Buenos Aires, Argentina
| | - Luciana Hernandez
- Laboratorio de Inmunoquímica y Biotecnología, Centro de Investigación Veterinaria de Tandil (CIVETAN), CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Buenos Aires, Argentina
| | - Anahí Tabera
- Laboratorio de Microbiología de los Alimentos, Departamento de Tecnología y Calidad de los Alimentos, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Buenos Aires, Argentina
| | - Ana Victoria Bustamante
- Laboratorio de Inmunoquímica y Biotecnología, Centro de Investigación Veterinaria de Tandil (CIVETAN), CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Buenos Aires, Argentina
| | - Andrea Mariel Sanso
- Laboratorio de Inmunoquímica y Biotecnología, Centro de Investigación Veterinaria de Tandil (CIVETAN), CONICET, Facultad de Ciencias Veterinarias, UNCPBA, Tandil, Buenos Aires, Argentina
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Kalantar-Neyestanaki D, Mansouri S, Tadjrobehkar O, Isaei E. The frequency of adherence, biofilm-associated, Arginine Catabolic Mobile element genes, and biofilm formation in clinical and healthcare worker coagulase-negative staphylococci isolates. BMC Microbiol 2023; 23:222. [PMID: 37582708 PMCID: PMC10426181 DOI: 10.1186/s12866-023-02959-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 07/25/2023] [Indexed: 08/17/2023] Open
Abstract
BACKGROUND Healthcare workers may pave the way for increased infections in hospitalized patients by coagulase-negative staphylococci (CoNS). Biofilm formation and antibiotic resistance are the major problems posed by CoNS in nosocomial infections. In this study, we determined biofilm production level and the distribution of biofilm-associated and virulence genes, including icaADBC, aap, bhp, atlE, embp, and fbe, as well as IS256, IS257, mecA, and ACME clusters (arc-A, opp-3AB) among 114 clinical (n = 57) and healthcare workers (n = 57) CoNS isolates in Kerman, Iran. RESULTS In this study, more than 80% (n = 96) of isolates were methicillin-resistant CoNS (MR-CoNS). Out of 114 isolates, 33% (n = 38) were strong biofilm producers. Strong biofilm formation was found to be significantly different between clinical and healthcare workers' isolates (P < 0.050). In addition, 28% (n = 32) of isolates were positive for icaADBC simultaneously, and all were strong biofilm producers. The prevalence of icaADBC, mecA, bhp, fbe, and IS256 in clinical isolates was higher than that in healthcare workers' isolates (P < 0.050). A significant relationship was observed between clinical isolates and the presence of icaADBC, mecA, bhp, and IS256. Although these elements were detected in healthcare workers' isolates, they were more frequent in clinical isolates compared to those of healthcare workers. CONCLUSIONS The high prevalence of ACME clusters in healthcare workers' isolates and biofilm formation of these isolates partially confirms the bacterial colonization in the skin of healthcare workers. Isolating MR-CoNS from healthcare workers' skin through similar genetic elements to clinical isolates, such as icaADBC, mecA, and IS256, calls for appropriate strategies to control and prevent hospital infections.
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Affiliation(s)
- Davood Kalantar-Neyestanaki
- Medical Mycology and Bacteriology Research Center, Kerman University of Medical Sciences, Kerman, Iran
- Department of Medical Microbiology (Bacteriology and Virology), Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Shahla Mansouri
- Medical Mycology and Bacteriology Research Center, Kerman University of Medical Sciences, Kerman, Iran
- Department of Medical Microbiology (Bacteriology and Virology), Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Omid Tadjrobehkar
- Medical Mycology and Bacteriology Research Center, Kerman University of Medical Sciences, Kerman, Iran
- Department of Medical Microbiology (Bacteriology and Virology), Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Elham Isaei
- Noncommunicable Diseases Research Center, Bam University Of Medical Sciences, Bam, Iran.
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Yang S, Wang B, Li J, Zhao X, Zhu Y, Sun Q, Liu H, Wen X. Genetic Diversity, Antibiotic Resistance, and Virulence Gene Features of Methicillin-Resistant Staphylococcus aureus Epidemics in Guiyang, Southwest China. Infect Drug Resist 2022; 15:7189-7206. [PMID: 36514797 PMCID: PMC9741838 DOI: 10.2147/idr.s392434] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022] Open
Abstract
Purpose Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most common pathogens of community- and hospital-acquired infections, and its prevalence is increasing globally. Guiyang is the capital city of Guizhou Province, Southwest China; as the transport and tourism centre of Southwest China, Guizhou Province is bordered by Yunnan, Sichuan, Chongqing, and Guangxi Provinces. Although MRSA prevalence is increasing, little is known about its aspects in the area. The purpose of this study was to analyse MRSA molecular characteristics, antimicrobial resistance, and virulence genes in Guiyang. Methods In total, 209 MRSA isolates from four hospitals (2019-2020) were collected and analysed by antimicrobial susceptibility testing and molecular classification by the MLST, spa, and SCCmec typing methods. Isolate antibiotic resistance rates were detected by a drug susceptibility assays. PCR amplification was used to detect the virulence gene-carrying status. Results Twenty-four STs, including 4 new STs (ST7346, ST7347, ST7348, and ST7247) and 3 new allelic mutations, were identified based on MLST. The major prevalent ST type and clone complex were ST59 (49.8%) and CC59 (62.7%), respectively. Spa type t437 (42.1%) and SCCmec IV (55.5%) were identified by spa and SCCmec typing methods as the most important types. Drug sensitivity data showed that the multidrug resistance rate was 79.0%. There were significant differences in multidrug resistance rates and virulence gene-carrying rates for seb, hla, hlb, cna and bap between ST59 and non-ST59 types. Conclusion ST59-SCCmecIV-t437 is a major epidemic clone in Guiyang that should be monitored by local medical and health institutions. The situation differs from other adjacent or middle provinces of China, which may be due to the special geographical location of the region and the trend in antibiotic use or lifestyle. This study provides empirical evidence for local medical and health departments to prevent and control the spread of MRSA.
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Affiliation(s)
- SuWen Yang
- School of Basic Medical Sciences, Basic Medical School, Guizhou Medical University, Guiyang, 550025, People’s Republic of China,Engineering Research Centre of Medical Biotechnology, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China,People’s Hospital of Kaiyang, Guiyang, 550300, People’s Republic of China
| | - Bing Wang
- Engineering Research Centre of Medical Biotechnology, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China,Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China
| | - Jing Li
- Department of Microbial Immunology, The First Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, People’s Republic of China
| | - Xue Zhao
- Department of Clinical Laboratory, The First People’s Hospital of Guiyang, Guiyang, 550002, People’s Republic of China
| | - Yan Zhu
- Department of Clinical Laboratory, The Fourth People’s Hospital of Guiyang, Guiyang, 550002, People’s Republic of China
| | - Qian Sun
- Department of Emergency Medicine, The First People’s Hospital of Guiyang, Guiyang, 550002, People’s Republic of China
| | - HongMei Liu
- Engineering Research Centre of Medical Biotechnology, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China,Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, 550025, People’s Republic of China
| | - XiaoJun Wen
- School of Basic Medical Sciences, Basic Medical School, Guizhou Medical University, Guiyang, 550025, People’s Republic of China,Correspondence: XiaoJun Wen; HongMei Liu, Guizhou Medical University, Guiyang, 550025, People’s Republic of China, Email ;
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Jaan S, Shah M, Ullah N, Amjad A, Javed MS, Nishan U, Mustafa G, Nawaz H, Ahmed S, Ojha SC. Multi-epitope chimeric vaccine designing and novel drug targets prioritization against multi-drug resistant Staphylococcus pseudintermedius. Front Microbiol 2022; 13:971263. [PMID: 35992654 PMCID: PMC9386485 DOI: 10.3389/fmicb.2022.971263] [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: 06/16/2022] [Accepted: 07/19/2022] [Indexed: 11/21/2022] Open
Abstract
Biofilm synthesizing multi-drug resistant Staphylococcus pseudintermedius bacteria has been recognized as the human infectious agent. It has been detected in the diseases of skin, ear, and postoperative infections. Its infections are becoming a major health problem due to its multi-drug resistance capabilities. However, no commercial vaccine for the treatment of its infections is currently available in the market. Here we employed the subtractive proteomics and reverse vaccinology approach to determine the potential novel drug and vaccine targets against S. pseudintermedius infections in humans. After screening the core-proteome of the 39 complete genomes of S. pseudintermedius, 2 metabolic pathways dependent and 34 independent proteins were determined as novel potential drug targets. Two proteins were found and used as potential candidates for designing the chimeric vaccine constructs. Depending on the properties such as antigenicity, toxicity and solubility, multi-epitope based vaccines constructs were designed. For immunogenicity enhancement, different specific sequences like linkers, PADRE sequences and molecular adjuvants were added. Molecular docking and molecular dynamic simulation analyses were performed to evaluate the prioritized vaccine construct’s interactions with human immune cells HLA and TLR4. Finally, the cloning and expression ability of the vaccine construct was determined in the bacterial cloning system and human body immune response was predicted through immune simulation analysis. In conclusion, this study proposed the potential drug and vaccine targets and also designed a chimera vaccine to be tested and validated against infectious S. pseudintermedius species.
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Affiliation(s)
- Samavia Jaan
- Department of Biochemistry, Bahauddin Zakariya University, Multan, Pakistan
| | - Mohibullah Shah
- Department of Biochemistry, Bahauddin Zakariya University, Multan, Pakistan
- *Correspondence: Mohibullah Shah, ;
| | - Najeeb Ullah
- Department of Biochemistry, Bahauddin Zakariya University, Multan, Pakistan
| | - Adnan Amjad
- Institute of Food Science and Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Sameem Javed
- Institute of Food Science and Nutrition, Bahauddin Zakariya University, Multan, Pakistan
| | - Umar Nishan
- Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan
| | - Ghazala Mustafa
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Haq Nawaz
- Department of Biochemistry, Bahauddin Zakariya University, Multan, Pakistan
| | - Sarfraz Ahmed
- Department of Basic Sciences, University of Veterinary and Animal Sciences Lahore, Narowal, Pakistan
| | - Suvash Chandra Ojha
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, China
- Suvash Chandra Ojha,
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Ren Z, Yu J, Du J, Zhang Y, Hamushan M, Jiang F, Zhang F, Wang B, Tang J, Shen H, Han P. A General Map of Transcriptional Expression of Virulence, Metabolism, and Biofilm Formation Adaptive Changes of Staphylococcus aureus When Exposed to Different Antimicrobials. Front Microbiol 2022; 13:825041. [PMID: 35783396 PMCID: PMC9247510 DOI: 10.3389/fmicb.2022.825041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
Biofilm formation of Staphylococcus aureus is the major cause of implant-associated infections (IAIs). Antimicrobial treatment is one of the most effective therapeutic options for S. aureus infections. However, it can also lead to adaptive transcriptomic changes due to extreme selective pressure, which may increase the risk of antimicrobial resistance. To study the transcriptional changes in S. aureus upon exposure to antimicrobial agents, we obtained expression profiles of S. aureus treated with six antimicrobials (flucloxacillin, vancomycin, ciprofloxacin, clindamycin, erythromycin, and linezolid, n = 6 for each group). We also included an untreated control group (n = 8) downloaded from the Gene Expression Omnibus (GEO) database (GSE70043, GSE56100) for integrated bioinformatic analyses. We identified 82 (44 up, 38 down) and 53 (17 up, 36 down) differentially expressed genes (DEGs) in logarithmic and stationary phases, respectively. When exposed to different antimicrobial agents, we found that manganese import system genes and immune response gene sbi (immunoglobulin G-binding protein Sbi) were upregulated in S. aureus at all stages. During the logarithmic phase, we observed adaptive transcriptomic changes in S. aureus mainly in the stability of protein synthesis, adhesion, and biofilm formation. In the stationary phase, we observed a downregulation in genes related to amino biosynthesis, ATP synthesis, and DNA replication. We verified these results by qPCR. Importantly, these results could help our understanding of the molecular mechanisms underlying the proliferation and antimicrobial resistance of S. aureus.
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Affiliation(s)
- Zun Ren
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Jinlong Yu
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Jiafei Du
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Yubo Zhang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Musha Hamushan
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Feng Jiang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Feiyang Zhang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Boyong Wang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
| | - Jin Tang
- Department of Clinical Laboratory, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- *Correspondence: Jin Tang,
| | - Hao Shen
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- Department of Orthopedics, Shanghai Sixth People’s Hospital Fujian, Jinjiang, China
- Hao Shen,
| | - Pei Han
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- Pei Han,
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Tai CH, Liu WL, Pan SC, Ku SC, Lin FJ, Wu CC. Evaluation of the Negative Predictive Value of Methicillin-Resistant Staphylococcus aureus Nasal Swab Screening in the Medical Intensive Care Units and Its Effect on Antibiotic Duration. Infect Drug Resist 2022; 15:1259-1266. [PMID: 35355623 PMCID: PMC8959872 DOI: 10.2147/idr.s351832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/11/2022] [Indexed: 11/23/2022] Open
Abstract
Background In addition to active surveillance of methicillin-resistant Staphylococcus aureus (MRSA) carrier, MRSA nasal screening can be valuable for antibiotic de-escalation. This study aimed to assess the correlations between the MRSA nasal swab and subsequent culture results in patients admitted to medical intensive care units (MICU). The impact of MRSA nasal swab on the antibiotic duration was also evaluated. Materials and Methods This retrospective study enrolled patients who received glycopeptides in the MICU of a medical center in 2019. Patients treated with glycopeptides for over 2 days before MICU admission were excluded. The associated data were collected through the electronic medical record system. The negative predictive value (NPV) of MRSA nasal swabs for MRSA infection was calculated, and their influence on empirical glycopeptide treatment duration was analyzed. Results Of the 338 patients who met the inclusion criteria, 277 underwent MRSA nasal screening. The NPV of MRSA-negative nasal swab for subsequent MRSA infection was 98.4%. The glycopeptide treatment duration of the patients with and without nasal screening was not significantly different (4.2 ± 2.8 vs 4.4 ± 3.0 days, p = 0.577). Of the 120 patients with MRSA-negative nasal swab and no subsequent MRSA infection, 75 continued empirical glycopeptides therapy. The additional treatment time was 3 days (interquartile range: 2–6 days). Conclusion The MRSA nasal swabs have high NPV for MRSA infection in critically ill patients. However, it has no impact on the empirical glycopeptide treatment duration. The value of MRSA nasal swabs should be advocated to optimize antibiotic therapy.
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Affiliation(s)
- Chih-Hsun Tai
- Department of Pharmacy, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.,School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Wei-Ling Liu
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Sung-Ching Pan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Shih-Chi Ku
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Fang-Ju Lin
- Department of Pharmacy, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.,School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan.,Graduate Institute of Clinical Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chien-Chih Wu
- Department of Pharmacy, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.,School of Pharmacy, College of Medicine, National Taiwan University, Taipei, Taiwan
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9
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Saber T, Samir M, El-Mekkawy RM, Ariny E, El-Sayed SR, Enan G, Abdelatif SH, Askora A, Merwad AMA, Tartor YH. Methicillin- and Vancomycin-Resistant Staphylococcus aureus From Humans and Ready-To-Eat Meat: Characterization of Antimicrobial Resistance and Biofilm Formation Ability. Front Microbiol 2022; 12:735494. [PMID: 35211098 PMCID: PMC8861318 DOI: 10.3389/fmicb.2021.735494] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 11/29/2021] [Indexed: 12/15/2022] Open
Abstract
Methicillin-resistant and vancomycin-resistant Staphylococcus aureus (MRSA and VRSA) are zoonotic life-threatening pathogens, and their presence in food raises a public health concern. Yet, scarce data are available regarding MRSA and VRSA in both ready-to-eat (RTE) meat and food handlers. This study was undertaken to determine the frequency, antimicrobial resistance, and biofilm-forming ability of MRSA and VRSA isolated from RTE meat (shawarma and burger) and humans (food handlers, and hospitalized patients) in Zagazig city, Sharkia Governorate, Egypt. We analyzed 176 samples (112 human samples: 72 from hospitalized patients and 40 from food handlers, 64 RTE meat samples: 38 from shawarma and 26 from burger). Using phenotypic, PCR-based identification of nuc gene and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS), 60 coagulase-positive S. aureus (COPS) isolates were identified in the samples as follow: RTE meat (15/64, 23.4%), hospitalized patients (33/72, 45.8%) and food handlers (12/40, 30%). All the COPS isolates were mecA positive (and thus were classified as MRSA) and multidrug resistant with multiple antibiotic resistance indices ranging from 0.25 to 0.92. Overall, resistance to cefepime (96.7%), penicillin (88.3%), were common, followed by ampicillin-sulbactam (65%), ciprofloxacin (55%), nitrofurontoin (51.7%), and gentamicin (43.3%). VRSA was detected in 30.3% of COPS hospitalized patient's isolates, 26.7% of COPS RTE meat isolates and 25% of COPS food handler's isolates. VanA, vanB, or both genes were detected in 64.7, 5.9, and 29.4% of all VAN-resistant isolates, respectively. The majority of the COPS isolates (50/60, 83.3%) have biofilm formation ability and harbored icaA (76%), icaD (74%), icaC (50%), and icaB (46%) biofilm-forming genes. The bap gene was not detected in any of the isolates. The ability of MRSA and VRSA isolates to produce biofilms in addition to being resistant to antimicrobials highlight the danger posed by these potentially virulent microorganisms persisting in RTE meat, food handlers, and patients. Taken together, good hygiene practices and antimicrobial surveillance plans should be strictly implemented along the food chain to reduce the risk of colonization and dissemination of MRSA and VRSA biofilm-producing strains.
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Affiliation(s)
- Taisir Saber
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Mohamed Samir
- Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Rasha M. El-Mekkawy
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Eman Ariny
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Sara Ramadan El-Sayed
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Gamal Enan
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Sawasn H. Abdelatif
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed Askora
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Abdallah M. A. Merwad
- Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Yasmine H. Tartor
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
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PIA and rSesC Mixture Arisen Antibodies Could Inhibit the Biofilm-Formation in Staphylococcus aureus. Rep Biochem Mol Biol 2021; 10:1-12. [PMID: 34277863 DOI: 10.52547/rbmb.10.1.1] [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: 08/06/2020] [Accepted: 09/11/2020] [Indexed: 11/18/2022]
Abstract
Background Staphylococcus aureus as a causative agent of hospital-acquired infections has been considered as the primary concern in biomaterial-related infections (BAIs). Methods Following the purification of polysaccharide intercellular adhesion (PIA) as an efficient macromolecule in biofilm formation in the native condition, recombinant S. epidermidis surface-exposed rSesC protein, with the most homology to clumping factor A (ClfA) in S. aureus was cloned and expressed in a prokaryotic host as well. Fourier transform infrared spectrometry (FTIR) and Western blotting procedure analyzed purified PIA and protein, respectively. Then, the immune response was evaluated by measuring total IgG titers. Moreover, the capacity of Anti-biofilm forming activity of arisen antibodies to a biofilm-forming S. aureus strains was assessed by the semi-quantitative micro-plate procedure. Results Data showed that the total IgGs were boosted in mice immunized sera. By performing an inhibition assay, the biofilm inhibitory effect of secreted antibodies to test strain was observed. Arisen antibodies against the mixture significantly were more potent than PIA and rSesC, when comparing individual antigens in a biofilm inhibition assay. Conclusion immunization of mice with mentioned antigens especially a mixture of them, could eliminate the biofilm formation process in S. aureus. Hopefully, this study corresponds to the suggestion that the immunization of mice with PIA and rSesC candidate vaccines could protect against S. aureus infection.
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Mirzaei B, Mousavi SF, Babaei R, Bahonar S, Siadat SD, Shafiee Ardestani M, Shahrooei M, Van Eldere J. Synthesis of conjugated PIA–rSesC and immunological evaluation against biofilm-forming Staphylococcus epidermidis. J Med Microbiol 2019; 68:791-802. [DOI: 10.1099/jmm.0.000910] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- Bahman Mirzaei
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Iran
| | - Seyed Fazlollah Mousavi
- Department of Microbiology, Microbial Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Reyhane Babaei
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Iran
| | - Sara Bahonar
- Department of Medical Microbiology and Virology, Faculty of Medicine, Mazandaran University of Medical Science, Iran
| | - Seyed Davar Siadat
- Mycobacteriology and Pulmonary Research Department, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mehdi Shafiee Ardestani
- Department of Radio-pharmacy, Faculty of Pharmacy, Tehran University of Medical Science, Tehran, Iran
| | - Mohammad Shahrooei
- Laboratory of Medical Microbiology, Department of Medical Diagnostic Sciences, KU Leuven, UZ Gasthuisberg, Herestraat 49 CDG 8th floor, B-3000 Leuven, Belgium
| | - John Van Eldere
- Laboratory of Medical Microbiology, Department of Medical Diagnostic Sciences, KU Leuven, UZ Gasthuisberg, Herestraat 49 CDG 8th floor, B-3000 Leuven, Belgium
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