1
|
Aniba R, Dihmane A, Raqraq H, Ressmi A, Nayme K, Timinouni M, Barguigua A. Molecular and phenotypic characterization of biofilm formation and antimicrobial resistance patterns of uropathogenic staphylococcus haemolyticus isolates in Casablanca, Morocco. Diagn Microbiol Infect Dis 2024; 110:116483. [PMID: 39236594 DOI: 10.1016/j.diagmicrobio.2024.116483] [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: 05/11/2024] [Revised: 08/05/2024] [Accepted: 08/06/2024] [Indexed: 09/07/2024]
Abstract
This study aimed to establish the correlation between antibiotic resistance and biofilm formation by Staphylococcus haemolyticus and to examine the impact of sub-inhibitory concentrations of antibiotics (sub-MICs) on biofilm formation. Antibiotic susceptibility testing was conducted using the disk diffusion method, and biofilm formation was determined using Congo red agar and microtiter plate methods. Antibiotic resistance and biofilm-associated genes were detected using polymerase chain reaction. The majority of the twenty-one S. haemolyticus isolates were multidrug-resistant, methicillin-resistant (MRSH) and biofilm producers, including 43 % of moderate biofilm producers. A significant correlation was observed between MRSH and MSSH isolates in terms of biofilm production. Vancomycin, gentamicin, and ciprofloxacin at their sub-MICs tended to promote biofilm formation. The eno gene was present in 76.2 % of strains, followed by aap, and atlE. This study revealed a strong correlation between the biofilm-forming ability and antibiotic resistance in S. haemolyticus, which underlines a crucial public health issue.
Collapse
Affiliation(s)
- Rafik Aniba
- Team of Biotechnology & Sustainable Development of Natural Resources, Department of Biology, Polydisciplinary Faculty, Sultan Moulay Slimane University, Beni Mellal, Morocco; Molecular Bacteriology Laboratory, Pasteur Institute of Morocco, Casablanca, Morocco.
| | - Asmaa Dihmane
- Team of Biotechnology & Sustainable Development of Natural Resources, Department of Biology, Polydisciplinary Faculty, Sultan Moulay Slimane University, Beni Mellal, Morocco
| | - Habiba Raqraq
- Team of Biotechnology & Sustainable Development of Natural Resources, Department of Biology, Polydisciplinary Faculty, Sultan Moulay Slimane University, Beni Mellal, Morocco
| | - Amina Ressmi
- Team of Biotechnology & Sustainable Development of Natural Resources, Department of Biology, Polydisciplinary Faculty, Sultan Moulay Slimane University, Beni Mellal, Morocco
| | - Kaotar Nayme
- Molecular Bacteriology Laboratory, Pasteur Institute of Morocco, Casablanca, Morocco
| | - Mohammed Timinouni
- Laboratoire de Biotechnologie et bio-informatique: Ecole des Hautes Etudes de Biotechnologie et de santé (EHEB); Casablanca, Morocco
| | - Abouddihaj Barguigua
- Team of Biotechnology & Sustainable Development of Natural Resources, Department of Biology, Polydisciplinary Faculty, Sultan Moulay Slimane University, Beni Mellal, Morocco
| |
Collapse
|
2
|
Wei PW, Wang X, Wang C, Chen M, Liu MZ, Liu WX, He YL, Xu GB, Zheng XH, Zhang H, Liu HM, Wang B. Ginkgo biloba L. exocarp petroleum ether extract inhibits methicillin-resistant Staphylococcus aureus by modulating ion transport, virulence, and biofilm formation in vitro and in vivo. JOURNAL OF ETHNOPHARMACOLOGY 2024; 328:117957. [PMID: 38493904 DOI: 10.1016/j.jep.2024.117957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/10/2024] [Accepted: 02/19/2024] [Indexed: 03/19/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE As reported in the Ancient Chinese Medicinal Books, Ginkgo biloba L. fruit has been used as a traditional Chinese medicine for the treatment asthma and cough or as a disinfectant. Our previous study demonstrated that G. biloba exocarp extract (GBEE), an extract of a traditional Chinese herb, inhibits the formation of methicillin-resistant Staphylococcus aureus (MRSA) biofilms. However, GBEE is a crude extract that contains many components, and the underlying mechanisms of purified GBEE fractions extracted with solvents of different polarities are unknown. AIM OF THE STUDY This study aimed to investigate the different components in GBEE fractions extracted with solvents of different polarities and their antibacterial effects and mechanisms against MRSA and Staphylococcus haemolyticus biofilms both in vitro and in vivo. METHODS The components in different fractions were detected by high-performance liquid chromatography-high resolution mass spectrometry (HPLC-HRMS). Microbroth dilution assays and time growth curves were used to determine the antibacterial effects of the fractions on 15 clinical bacterial isolates. Crystal violet staining, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were utilized to identify the fractions that affected bacterial biofilm formation. The potential MRSA targets of the GBEE fraction obtained with petroleum ether (PE), denoted GBEE-PE, were screened by transcriptome sequencing, and the gene expression profile was verified by quantitative polymerase chain reaction (qPCR). RESULTS HPLC-HRMS analysis revealed that the four GBEE fractions (extracted with petroleum ether, ethyl acetate, n-butanol, and water) contained different ginkgo components, and the antibacterial effects decreased as the polarity of the extraction solvent increased. The antibacterial activity of GBEE-PE was greater than that of the GBEE fraction extracted with ethyl acetate (EA). GBEE-PE improved H. illucens survival and reduced MRSA colonization in model mouse organs. Crystal violet staining and SEM and TEM analyses revealed that GBEE-PE inhibited MRSA and S. haemolyticus biofilm formation. Transcriptional analysis revealed that GBEE-PE inhibits MRSA biofilms by altering ion transport, cell wall metabolism and virulence-related gene expression. In addition, the LO2 cell viability and H. illucens toxicity assay data showed that GBEE-PE at 20 mg/kg was nontoxic. CONCLUSION The GBEE fractions contained different components, and their antibacterial effects decreased with increases in the polarity of the extraction solvent. GBEE-PE limited MRSA growth and biofilm formation by affecting ion transport, cell wall synthesis, and virulence-related pathways. This research provides a more detailed overview of the mechanism by which GBEE-PE inhibits MRSA both in vitro and in vivo and suggests that GBEE-PE is a new prospective antimicrobial with the potential to be used in MRSA therapeutics in the future.
Collapse
Affiliation(s)
- Peng-Wei Wei
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China
| | - Xu Wang
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China
| | - Cong Wang
- The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Formulation (R&D) Department, Guiyang, 550001, China
| | - Ming Chen
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, China Ministry of Education (School of Public Health, Guizhou Medical University), Guiyang, 561113, Guizhou, China
| | - Meng-Zhu Liu
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, China Ministry of Education (School of Public Health, Guizhou Medical University), Guiyang, 561113, Guizhou, China
| | - Wen-Xia Liu
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China; Key Laboratory of Microbiology and Parasitology of Education Department of Guizhou, School of Basic Medical Science, Guizhou Medical University, Guiyang, 561113, Guizhou, China
| | - Yan-Ling He
- Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou, 318000, Zhejiang, China
| | - Guo-Bo Xu
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guian New Area, 561113, Guizhou, China.
| | - Xiao-He Zheng
- Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou, 318000, Zhejiang, China
| | - Hua Zhang
- Department of Laboratory Medicine, Guizhou Provincial People's Hospital, Affiliated Hospital of Guizhou University, Guiyang, 550002, Guizhou, China.
| | - Hong-Mei Liu
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China.
| | - Bing Wang
- Engineering Research Center of Health Medicine Biotechnology of Guizhou Province, Key Laboratory of Biology and Medical Engineering, School of Biology and Engineering (Modern Industry College of Health Medicine), Guizhou Medical University, Guiyang, 561113, Guizhou, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, China Ministry of Education (School of Public Health, Guizhou Medical University), Guiyang, 561113, Guizhou, China; Key Laboratory of Microbiology and Parasitology of Education Department of Guizhou, School of Basic Medical Science, Guizhou Medical University, Guiyang, 561113, Guizhou, China.
| |
Collapse
|
3
|
Crippa BL, de Matos LG, Souza FN, Silva NCC. Non- aureus staphylococci and mammaliicocci (NASM): their role in bovine mastitis and One Health. J DAIRY RES 2024; 91:44-56. [PMID: 38584301 DOI: 10.1017/s0022029924000165] [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: 04/09/2024]
Abstract
Non-aureus staphylococci (NAS) are gaining importance in mastitis and public health, and some NAS have been reclassified as mammaliicocci (NASM). Bovine milk production has a major influence on the world economy, being an essential source of income for small, medium and large producers, and bovine mastitis caused by NASM can cause an economic impact. Mastitis generates financial losses due to reduced revenue, increased veterinary costs and expenses associated with animal slaughter. However, it is also a public health issue involving animal health and welfare, human health and the ecosystem. Furthermore, it is an increasingly common infection caused by NASM, including antimicrobial-resistant strains. Despite all these adverse effects that NASM can cause, some studies also point to its protective role against mastitis. Therefore, this review article addresses the negative and positive aspects that NASM can cause in bovine mastitis, the virulence of the disease and resistance factors that make it difficult to treat and, through the One Health approach, presents a holistic view of how mastitis caused by NASM can affect both animal and human health at one and the same time.
Collapse
Affiliation(s)
- Bruna Lourenço Crippa
- Department of Food Science and Nutrition, School of Food Engineering (FEA), University of Campinas (UNICAMP), Campinas, SP, 13083-862, Brazil
| | - Luiz Gustavo de Matos
- Department of Food Science and Nutrition, School of Food Engineering (FEA), University of Campinas (UNICAMP), Campinas, SP, 13083-862, Brazil
- Department of Veterinary Medicine, Università degli Studi di Milano, Lodi, Lombardia, Italy
| | - Fernando Nogueira Souza
- Department of Clinical Science, Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, 05508-270, Brazil
- Department of Veterinary Medicine, School of Food Engineering (FEA), University of Campinas (UNICAMP), Campinas, SP, 13083-862, Brazil
| | - Nathália Cristina Cirone Silva
- Department of Food Science and Nutrition, School of Food Engineering (FEA), University of Campinas (UNICAMP), Campinas, SP, 13083-862, Brazil
| |
Collapse
|
4
|
C Silva-de-Jesus A, Rossi CC, Pereira-Ribeiro PM, Guaraldi AL, Giambiagi-deMarval M. Unusual carriage of virulence genes sasX/sesI/shsA by nosocomial Staphylococcus haemolyticus from Brazil. Future Microbiol 2023; 18:407-414. [PMID: 37213139 DOI: 10.2217/fmb-2022-0225] [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] [Received: 09/27/2022] [Accepted: 02/24/2023] [Indexed: 05/23/2023] Open
Abstract
Background: Staphylococcus haemolyticus is an emerging threat in the nosocomial environment but only some virulence factors are known. Materials & methods: The frequency of the sasX gene (or orthologues sesI/shsA), encoding an invasiveness-related surface-associated protein, in S. haemolyticus was detected in different hospitals in Rio de Janeiro. Results: 9.4% of strains were sasX/sesI/shsA-positive, some were in the context of the ΦSPβ-like prophage and devoid of CRISPR systems, indicating potential transferability of their virulence genes. Gene sequencing evidenced that Brazilian S. haemolyticus harbored sesI, instead of the usual sasX, while S. epidermidis had sasX instead of sesI, suggesting horizontal acquisition. Conclusion: The contexts of Brazilian sasX/sesI/shsA favor transfer, which is alarming given the difficulty in treating infections caused by S. haemolyticus.
Collapse
Affiliation(s)
- Ana C Silva-de-Jesus
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Ciro C Rossi
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Paula Ma Pereira-Ribeiro
- Centro Biomédico, Faculdade de Ciências Médicas, Universidade Estadual do Rio de Janeiro, RJ, Brazil
| | - Ana Lm Guaraldi
- Centro Biomédico, Faculdade de Ciências Médicas, Universidade Estadual do Rio de Janeiro, RJ, Brazil
| | - Marcia Giambiagi-deMarval
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| |
Collapse
|
5
|
Wang C, Wei PW, Song CR, Wang X, Zhu GF, Yang YX, Xu GB, Hu ZQ, Tang L, Liu HM, Wang B. Evaluation of the antimicrobial function of Ginkgo biloba exocarp extract against clinical bacteria and its effect on Staphylococcus haemolyticus by disrupting biofilms. JOURNAL OF ETHNOPHARMACOLOGY 2022; 298:115602. [PMID: 36030030 DOI: 10.1016/j.jep.2022.115602] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/22/2022] [Accepted: 08/01/2022] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The fruit of Ginkgo biloba L. (Ginkgo nuts) has been used for a long time as a critical Chinese medicine material to treat cough and asthma, as well as a disinfectant. Similar records were written in the Compendium of Materia Medica (Ben Cao Gang Mu, pinyin in Chinese) and Sheng Nong's herbal classic (Shen Nong Ben Cao Jing, pinyin in Chinese). Recent research has shown that Ginkgo biloba exocarp extract (GBEE) has the functions of unblocking blood vessels and improving brain function, as well as antitumour activity and antibacterial activity. GBEE was shown to inhibit methicillin-resistant Staphylococcus aureus (MRSA) biofilm formation as a traditional Chinese herb in our previous report in this journal. AIM OF THE STUD: yThe antibiotic resistance of clinical bacteria has recently become increasingly serious. Thus, this study aimed to investigate the Ginkgo biloba exocarp extract (GBEE) antibacterial lineage, as well as its effect and mechanism on S. haemolyticus biofilms. This study will provide a new perspective on clinical multidrug resistant (MDR) treatment with ethnopharmacology herbs. METHODS The microbroth dilution assay was carried out to measure the antibacterial effect of GBEE on 13 types of clinical bacteria. Bacterial growth curves with or without GBEE treatment were drawn at different time points. The potential targets of GBEE against S. haemolyticus were screened by transcriptome sequencing. The effects of GBEE on bacterial biofilm formation and mature biofilm disruption were determined by crystal violet staining and scanning electron microscopy. The metabolic activity of bacteria inside the biofilm was assessed by colony-forming unit (CFU) counting and (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2HY-tetrazolium bromide (MTT) assay. Quantitative polymerase chain reaction (qPCR) was used to measure the gene expression profile of GBEE on S. haemolyticus biofilm-related factors. RESULTS The results showed that GBEE has bacteriostatic effects on 3 g-positive (G+) and 2 g-negative (G-) bacteria among 13 species of clinical bacteria. The antibacterial effect of GBEE supernatant liquid was stronger than the antibacterial effect of GBEE supernviaould-like liquid. GBEE supernatant liquid inhibited the growth of S. epidermidis, S. haemolyticus, and E. faecium at shallow concentrations with minimum inhibitory concentrations (MICs) of 2 μg/ml, 4 μg/ml and 8 μg/ml, respectively. Genes involved in quorum sensing, two-component systems, folate biosynthesis, and ATP-binding cassette (ABC) transporters were differentially expressed in GBEE-treated groups compared with controls. Crystal violet, scanning electron microscopy (SEM) and MTT assays showed that GBEE suppressed S. haemolyticus biofilm formation in a dose-dependent manner. Moreover, GBEE supernatant liquid downregulated cidA, cidB and atl, which are involved in cell lysis and extracellular DNA (eDNA) release, as well as downregulated the cbp, ebp and fbp participation in encoding cell-surface binding proteins. CONCLUSIONS GBEE has an excellent antibacterial effect on gram-positive bacteria and also inhibits the growth of gram-negative bacteria, such as A. baumannii (carbapenem-resistant Acinetobacter baumannii) CRABA and S. maltophilia. GBEE inhibits the biofilm formation of S. haemolyticus by altering the regulation and biofilm material-related genes, including the release of eDNA and cell-surface binding proteins.
Collapse
Affiliation(s)
- Cong Wang
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R & D, School of Pharmacy, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Peng-Wei Wei
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Chao-Rong Song
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Xu Wang
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Gao-Feng Zhu
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R & D, School of Pharmacy, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Yong-Xin Yang
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Guo-Bo Xu
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R & D, School of Pharmacy, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Zu-Quan Hu
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, China Ministry of Education (Guizhou Medical University), Guiyang, 550025, Guizhou, China
| | - Lei Tang
- Guizhou Provincial Engineering Technology Research Center for Chemical Drug R & D, School of Pharmacy, Guizhou Medical University, Guiyang, 550025, Guizhou, China.
| | - Hong-Mei Liu
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China.
| | - Bing Wang
- Engineering Research Center of Medical Biotechnology, Key Laboratory of Biology and Medical Engineering, Key Laboratory of Infectious Immune and Antibody Engineering in Guizhou Province, School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China; Key Laboratory of Microbiology and Parasitology of Education Department of Guizhou, School of Basic Medical Science, Guizhou Medical University, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, China Ministry of Education (Guizhou Medical University), Guiyang, 550025, Guizhou, China.
| |
Collapse
|
6
|
Clinical Infections, Antibiotic Resistance, and Pathogenesis of Staphylococcus haemolyticus. Microorganisms 2022; 10:microorganisms10061130. [PMID: 35744647 PMCID: PMC9231169 DOI: 10.3390/microorganisms10061130] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/27/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus haemolyticus (S. haemolyticus) constitutes the main part of the human skin microbiota. It is widespread in hospitals and among medical staff, resulting in being an emerging microbe causing nosocomial infections. S. haemolyticus, especially strains that cause nosocomial infections, are more resistant to antibiotics than other coagulase-negative Staphylococci. There is clear evidence that the resistance genes can be acquired by other Staphylococcus species through S. haemolyticus. Severe infections are recorded with S. haemolyticus such as meningitis, endocarditis, prosthetic joint infections, bacteremia, septicemia, peritonitis, and otitis, especially in immunocompromised patients. In addition, S. haemolyticus species were detected in dogs, breed kennels, and food animals. The main feature of pathogenic S. haemolyticus isolates is the formation of a biofilm which is involved in catheter-associated infections and other nosocomial infections. Besides the biofilm formation, S. haemolyticus secretes other factors for bacterial adherence and invasion such as enterotoxins, hemolysins, and fibronectin-binding proteins. In this review, we give updates on the clinical infections associated with S. haemolyticus, highlighting the antibiotic resistance patterns of these isolates, and the virulence factors associated with the disease development.
Collapse
|
7
|
Influence of Sub-Inhibitory Dosage of Cefotaxime on Multidrug Resistant Staphylococcus haemolyticus Isolated from Sick Neonatal Care Unit. Antibiotics (Basel) 2022; 11:antibiotics11030360. [PMID: 35326823 PMCID: PMC8944431 DOI: 10.3390/antibiotics11030360] [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: 01/25/2022] [Revised: 02/24/2022] [Accepted: 03/04/2022] [Indexed: 11/26/2022] Open
Abstract
Staphylococcus haemolyticus has emerged to be a frequently encountered late-onset sepsis pathogen among newborn infants. Critical care of neonates involves substantial usage of antibiotics and these pathogens are often exposed to sub-optimal doses of antibiotics which can augment maintenance of selection determinants and a range of physiological effects, prime among them being biofilm formation. Therefore, in this study, the outcome of a sub-inhibitory dosage of a commonly prescribed third-generation antibiotic, cefotaxime (CTX), on multidrug resistant (MDR) S. haemolyticus, was investigated. A total of 19 CTX-resistant, MDR and 5 CTX-susceptible strains isolated from neonates were included. Biofilm-forming abilities of S. haemolyticus isolates in the presence of sub-optimal CTX (30 μg/mL) were determined by crystal violet assays and extracellular DNA (eDNA) quantitation. CTX was found to significantly enhance biofilm production among the non-susceptible isolates (p-valueWilcoxintest—0.000008) with an increase in eDNA levels (p-valueWilcoxintest—0.000004). Further, in the absence of antibiotic selection in vitro, populations of MDR isolates, JNM56C1 and JNM60C2 remained antibiotic non-susceptible after >500 generations of growth. These findings demonstrate that sub-optimal concentration of CTX induces biofilm formation and short-term non-exposure to antibiotics does not alter non-susceptibility among S. haemolyticus isolates under the tested conditions.
Collapse
|
8
|
Lin LC, Liu TP, Chang SC, Lu JJ. Characterization of New Staphylococcus haemolyticus ST42 Populations in Northern Taiwan. Microb Drug Resist 2021; 28:56-62. [PMID: 34491866 DOI: 10.1089/mdr.2019.0459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Introduction: Staphylococcus haemolyticus is an acquired opportunistic pathogen causing nosocomial infections. Our previous studies of S. haemolyticus showed a group of isolates that produced a significantly higher disease severity than the others. Further molecular typing showed that the sequence type (ST) 42 was the major clone among the isolates. The main aim of this study was to characterize ST42. Materials and Methods: Sixty-one and 36 isolates were collected from burn and nonburn patients, respectively. Molecular typing, antibiotic susceptibility assays, and phenotypic characterizations were performed. Results: Thirteen STs, including seven new STs, were established (ST42 to ST48). ST42 was prevalent in burn and nonburn patients, and all the pulsotype C isolates were ST42. Four of the novel STs originated from ST3, suggesting that these clonal lineages evolved locally. ST3 and ST42 showed a significant difference in clindamycin susceptibility; molecular typing showed only one MLST locus variation among seven loci in SH1431, which has been reportedly involved in the regulation of biofilm formation through Zn 2+ binding affinities. Conclusions: Seven novel S. haemolyticus STs were identified; phylogenetic analysis suggested the presence of locally evolved clonal lineages. The predominant ST42 showed weak biofilm formation abilities; other factors that cause the clonal lineage change still need further investigation.
Collapse
Affiliation(s)
- Lee-Chung Lin
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Tsui-Ping Liu
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Shih-Cheng Chang
- Department of Medical Biotechnology and Laboratory Science and College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Jang-Jih Lu
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.,Department of Medical Biotechnology and Laboratory Science and College of Medicine, Chang Gung University, Taoyuan, Taiwan.,Department of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| |
Collapse
|