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Tang Y, Xiao N, Zou J, Mei Y, Yuan Y, Wang M, Wang Z, Zhou Y, Chen Y, Li S. Antibiotic resistance, biofilm formation, and molecular epidemiology of Staphylococcus aureus in a tertiary hospital in Xiangyang, China. Braz J Microbiol 2024; 55:1305-1315. [PMID: 38366298 PMCID: PMC11153456 DOI: 10.1007/s42770-024-01270-9] [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: 08/31/2023] [Accepted: 02/02/2024] [Indexed: 02/18/2024] Open
Abstract
Staphylococcus aureus is a common clinical pathogen that causes various human infections. The aim of this study was to investigate the antibiotic susceptibility pattern, molecular epidemiological characteristics, and biofilm formation ability of S. aureus isolates from clinical specimens in Xiangyang and to analyze the correlation among them. A total of 111 non-duplicate S. aureus isolates were collected from the Affiliated Hospital of Hubei University of Arts and Science. All isolates were tested for antibacterial susceptibility. Methicillin-resistant S. aureus (MRSA) was identified by the mecA gene PCR amplification. All isolates were analyzed to determine their biofilm-forming ability using the microplate method. The biofilm-related gene was determined using PCR. SCCmec, MLST, and spa types of MRSA strains were performed to ascertain the molecular characteristics. Among the 111 S. aureus isolates, 45 (40.5%) and 66 (59.5%) were MRSA and MSSA, respectively. The resistance of MRSA strains to the tested antibiotics was significantly stronger than that of MSSA strains. All isolates were able to produce biofilm with levels ranging from strong (28.9%, 18.2%), moderate (62.2%, 62.1%), to weak (8.9%, 19.7%). Strong biofilm formation was observed in MRSA strains than in MSSA strains, based on percentages. There were dynamic changes in molecular epidemic characteristics of MRSA isolates in Xiangyang. SCCmecIVa-ST22-t309, SCCmecIVa-ST59-t437, and SCCmecIVa-ST5-t2460 were currently the main epidemic clones in this region. SCCmecIVa-ST5-t2460 and SCCmecIVa/III-ST22-t309 have stronger antibiotic resistance than SCCmecIVa-ST59-t437 strains, with resistance to 6 ~ 8 detected non-β-lactam antibiotics. The molecular epidemic and resistance attributes of S. aureus should be timely monitored, and effective measures should be adopted to control the clinical infection and spread of the bacteria.
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Affiliation(s)
- Yitong Tang
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Na Xiao
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - JiuMing Zou
- Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China
| | - Yuling Mei
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yue Yuan
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Menghuan Wang
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Zezhou Wang
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yunjuan Zhou
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yiyuan Chen
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Shichao Li
- Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China.
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Huang L, Liu C, Li Z, Huang X, Zheng R, Shi Z, Hong X, Qin Y, Liu G. Characteristics of Virulent ST5-SCC mec II Methicillin-Resistant Staphylococcus aureus Prevalent in a Surgery Ward. Infect Drug Resist 2023; 16:3487-3495. [PMID: 37293535 PMCID: PMC10244206 DOI: 10.2147/idr.s410330] [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: 03/12/2023] [Accepted: 05/18/2023] [Indexed: 06/10/2023] Open
Abstract
Objective To investigate the transmission pathway of a MRSA prevalence in a pancreatic surgery ward in a Chinese teaching hospital. Methods Molecular epidemiology investigations were carried out combined PFGE, MLST, SCCmec typing and whole-genome sequencing for 20 successive MRSA isolates (2 isolates from the ward environment). Resistance and virulence genes were detected using specific PCR. Bacterial identification and AST were performed using the Vitek 2 Compact System. Clinical data of enrolled cases were retrieved from electronic case records. Results From January 2020 to May 2020, successive isolated 20 MRSA strains were clarified to 2 PFGE patterns (A = 19, B = 1) in the ward. Both isolates from environment and patients belonged to sequence type ST5-SCCmec II-spa type t311. MRSA-related resistance genes mecA, blaZ, ermA, ant(4')-Ia and norA were found in each clone. All 20 isolates carried tst, hlg, hla, eta, eap, fnbA and seo virulence genes, other virulence genes such as sea, sec, seb, seg, sei, sem, sen, ebpS and fnbB were also found in partial stains. All patients had fever symptom, 27.8% were accompanied by diarrhea, 88.9% had undergone surgery or invasive procedures within 30 days. Finally, 94.4% of these patients recovered. Conclusion This study confirmed a prevalence of ST5-MRSA-II-t311 clone in a surgery ward, indicated MRSA is a risk factor for post-surgery nosocomial infection and hand hygiene and environmental surveillance should not be ignored.
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Affiliation(s)
- Lei Huang
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Branch of National Clinical Research Center for Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Chengcheng Liu
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Branch of National Clinical Research Center for Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Zhanjie Li
- Department of Infection Control, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Xu Huang
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Department of Laboratory Medicine, the Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Ruiying Zheng
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Branch of National Clinical Research Center for Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Zhixin Shi
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Branch of National Clinical Research Center for Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Xin Hong
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Branch of National Clinical Research Center for Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Yufeng Qin
- School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Genyan Liu
- Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Branch of National Clinical Research Center for Laboratory Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
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Zhang H, Qin L, Jin C, Ju H, Jiang R, Li L, Zhang H, Gao W, Wei X, Dong H, Lu F, Lv G. Molecular Characteristics and Antibiotic Resistance of Staphylococcus aureus Isolated from Patient and Food Samples in Shijiazhuang, China. Pathogens 2022; 11:1333. [PMID: 36422585 PMCID: PMC9695393 DOI: 10.3390/pathogens11111333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/07/2022] [Accepted: 11/09/2022] [Indexed: 10/29/2023] Open
Abstract
Staphylococcus aureus (S. aureus) is a common opportunistic and zoonotic pathogen in the world and could easily cause human infections and food contaminations. This study investigated the sequence typing and resistance profiles of S. aureus isolates from patient and food samples in Shijiazhuang, China. A total of 101 S. aureus isolates were distributed into six clonal complexes (CCs) and 16 singletons. A total of 86 patient isolates were distributed into six clonal CCs and 12 singletons, including a new ST. CC59, CC5, CC22, and CC398 were the predominant CCs of patient isolates. A total of 15 foodborne S. aureus isolates were distributed into 3 CCs and 4 STs, and CC1 was the most prevalent CC. Moreover, 101 S. aureus isolates had high resistance to penicillin and low resistance to chloramphenicol and rifampicin. A total of 39 strains of methicillin-resistant Staphylococcus aureus (MRSA) were detected in this study, including thirty-eight strains of patient isolates (44.2%, 38/86) and one strain of food isolates (6.7%, 1/15). MRSA-ST5, MRSA-ST59, and MRSA-ST239 were the predominant MRSA isolates in hospitals. The present study explained the relationship between S. aureus isolated from patient and food samples and indicated the risks of S. aureus in infectious diseases.
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Affiliation(s)
- Han Zhang
- Basic Medicine College, Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Liyun Qin
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
- Hebei Key Laboratory of Unidentifiable Bacteria, Shijiazhuang 050011, China
| | - Caiping Jin
- Basic Medicine College, Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Huidong Ju
- College of Chemical Technology, Shijiazhuang University, Shijiazhuang 050035, China
| | - Ruiping Jiang
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
- Hebei Key Laboratory of Unidentifiable Bacteria, Shijiazhuang 050011, China
| | - Lijie Li
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
- Hebei Key Laboratory of Unidentifiable Bacteria, Shijiazhuang 050011, China
| | - Hong Zhang
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
- Hebei Key Laboratory of Unidentifiable Bacteria, Shijiazhuang 050011, China
| | - Weili Gao
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
- Hebei Key Laboratory of Unidentifiable Bacteria, Shijiazhuang 050011, China
| | - Xiuping Wei
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
| | - Hongyan Dong
- Basic Medicine College, Hebei University of Chinese Medicine, Shijiazhuang 050200, China
| | - Fei Lu
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050011, China
- Hebei Key Laboratory of Unidentifiable Bacteria, Shijiazhuang 050011, China
| | - Guoping Lv
- Basic Medicine College, Hebei University of Chinese Medicine, Shijiazhuang 050200, China
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Abd El-Hamid MI, Sewid AH, Samir M, Hegazy WAH, Bahnass MM, Mosbah RA, Ghaith DM, Khalifa E, Ramadan H, Alshareef WA, Alshareef HM, Ghoneim MM, Al-Sanea MM, Bendary MM. Clonal Diversity and Epidemiological Characteristics of ST239-MRSA Strains. Front Cell Infect Microbiol 2022; 12:782045. [PMID: 35402300 PMCID: PMC8990901 DOI: 10.3389/fcimb.2022.782045] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 02/16/2022] [Indexed: 12/14/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a major pathogen associated with severe morbidity and mortality and poses a significant threat to public health worldwide. The genetic diversity based on sequence types of MRSA strains was illustrated in previous studies; meanwhile, the diversity along with the predominant sequence type, especially in Egypt, remains unknown. The purpose of the current study was to determine the diversity of the predominant MRSA clone ST239-MRSA (n = 50) isolated from different hosts and clinical samples and to illustrate the correlation between the resistance patterns, toxin genes, and the genetic background in Port-said and El-Sharkia Governorates, Egypt. The ST239-MRSA clone was analyzed by phenotypic antibiotyping and various genotypic assays comprising SCCmec, agr, spa, coa, and coa-RFLP in addition to toxin gene profiles. Most of the analyzed strains (40/50, 80%) were multidrug resistant (MDR), belonged to SCCmec-III, agr-I, and coa genotype I, and harbored sea and pvl genes. A negative correlation between the toxin gene profiles and antimicrobial resistance was recorded. Meanwhile, the correlation between the toxin gene profiles and the genetic background was not observed in this study. Although ST239-MRSA strains belonged to a single sequence type, they exhibited a high degree of phenotypic and genotypic diversity, indicating weak clonality and adaptability. With such diversity, it is assumed that these strains may have undergone different evolutionary processes during transmission events among and/or within a single host or tissue niche.
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Affiliation(s)
- Marwa I Abd El-Hamid
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Alaa H Sewid
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed Samir
- Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Wael A H Hegazy
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Mosa M Bahnass
- Department of Animal Medicine (Infectious Disease), Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Rasha A Mosbah
- Fellow Pharmacist, Zagazig University Hospital, Zagazig, Egypt
| | - Doaa M Ghaith
- Department of Clinical and Chemical Pathology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Eman Khalifa
- Department of Microbiology, Faculty of Veterinary Medicine, Matrouh University, Matrouh, Egypt
| | - Hazem Ramadan
- Hygiene and Zoonoses Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Walaa A Alshareef
- Department of Microbiology, Faculty of Pharmacy, October 6 University, 6th of October, Egypt
| | - Hanan M Alshareef
- Department of Pharmacy Practice, Faculty of Pharmacy, University of Tabuk, Tabuk, Saudi Arabia
| | - Mohammed M Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, Al Maarefa University, Ad Diriyah, Saudi Arabia
| | - Mohammad M Al-Sanea
- Pharmaceutical Chemistry Department, College of Pharmacy, Jouf University, Sakaka, Saudi Arabia
| | - Mahmoud M Bendary
- Department of Microbiology and Immunology, Faculty of Pharmacy, Port Said University, Port Said, Egypt
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Maricaulis alexandrii sp. nov., a novel active bioflocculants-bearing and dimorphic prosthecate bacterium isolated from marine phycosphere. Antonie van Leeuwenhoek 2021; 114:1195-1203. [PMID: 33945067 DOI: 10.1007/s10482-021-01588-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022]
Abstract
An aerobic, Gram-stain-negative, straight or curved rods and dimorphic prosthecate bacterium designated as strain LZ-16-1T was isolated from phycosphere microbiota of routinely laboratory-cultured and highly-toxic marine dinoflagellate Alexandrium catenella LZT09. Strain LZ-16-1T produces active bioflocculanting exopolysaccharides (EPS). Cells were dimorphic with non-motile prostheca, or non-stalked and motile by a single polar flagellum. Growth occurred at 10-40 °C, pH 5-9 and 1-8% (w/v) NaCl, with optimum growth at 25 °C, pH 7-8 in the presence of 2-4% (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain LZ-16-1T was affiliated to the genus Maricaulis, and closely related to M. parjimensis MCS 25T (99.5%) and M. virginensis VC-5T (99.0%). However, based on genome sequencing and phylogenomic calculations, the average nucleotide identity (ANI) and digtal DNA-DNA genome hybridization (dDDH) values between strains LZ-16-1T and its closest relative, M. parjimensis MCS 25T were only 85.0 and 20.9%, respectively. The dominant fatty acids of strain LZ-16-1T were summed feature 8, C16:0, C17:0, C18:0, C18:1 ω9c and summed feature 9. Major polar lipids were sulfoquinovosyl diacylglycerol, six glycolipids, one unidentified phospholipid and one unidentified polar lipid. The predominant isoprenoid quinone was Q-10. The DNA G + C content calculated from the genome was 63.6 mol%. Physiological and chemotaxonomic characterizations further confirmed the distinctiveness of strain LZ-16-1T from other Maricaulis members. Thus, strain LZ-16-1T represents a novel species of the genus Maricaulis, for which the name Maricaulis alexandrii sp. nov. (type strain LZ-16-1T = KCTC 72194T = CCTCC AB 2019006T) is proposed.
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