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Dong Q, Wang Q, Zhang Y, Chen Y, Wang H, Ding H. Prevalence, antimicrobial resistance, and staphylococcal toxin genes of bla TEM-1a -producing Staphylococcus aureus isolated from animals in Chongqing, China. Vet Med Sci 2022; 9:513-522. [PMID: 36495160 PMCID: PMC9856999 DOI: 10.1002/vms3.1028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Staphylococcus aureus infection of livestock animals and humans is a major public health issue. There are reports of antimicrobial resistance and multiple staphylococcal superantigen genes in many countries and several provinces of China, but the status in Chongqing, China is uncertain. OBJECTIVES The aim of this study was to determine the prevalence, antimicrobial susceptibility, and other molecular characteristics of S. aureus isolates from livestock animals in Chongqing. METHODS Staphylococcus aureus was isolated and identified by selective enrichment and amplification of the nuc gene from 1371 samples collected at farms in Chongqing. The agar dilution method was used to determine the resistant phenotype, and extended spectrum β-lactamase genes were amplified by PCR. Methicillin-resistant S. aureus was verified by the presence of the mecA gene, and the presence or absence of SE, SEl, and TSST-1 genes was detected in the isolates. RESULTS We cultured 89 S. aureus isolates from 1371 samples between March 2014 and December 2017. These isolates were from pigs, cattle, goats, rabbits, and chickens. There were four methicillin-resistant S. aureus strains (three from pigs and one from a chicken). The 89 isolates had high resistance to penicillin (93.3%) and ampicillin (92.1%), but most were susceptible to amikacin and ofloxacin, with resistance rates below 10%. A total of 62.9% of the isolates had varying degrees of multidrug resistance. Almost all strains, except for three isolates from chickens, were positive for blaTEM-1a . There were 19 of 20 tested staphylococcal SE/SEl/TSST-1 genes present (all except for seq), and the predominant genes were sei (58.4%), tst-1 (56.2%), and seg (51.7%). CONCLUSIONS The high antimicrobial resistance and prevalence of blaTEM-1a reinforce the need to reduce the usage of antimicrobials in livestock. The universal existence of staphylococcal toxin genes implies a potential threat to public health by animal-to-human transmission via the food chain.
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Affiliation(s)
- Qingshuang Dong
- Laboratory of Veterinary MycoplasmologyCollege of Veterinary MedicineSouthwest UniversityChongqingChina
| | - Qing Wang
- Laboratory of Veterinary MycoplasmologyCollege of Veterinary MedicineSouthwest UniversityChongqingChina
| | - Yun Zhang
- Laboratory of Veterinary MycoplasmologyCollege of Veterinary MedicineSouthwest UniversityChongqingChina
| | - Yao Chen
- Laboratory of Veterinary MycoplasmologyCollege of Veterinary MedicineSouthwest UniversityChongqingChina
| | - Haoju Wang
- Laboratory of Veterinary MycoplasmologyCollege of Veterinary MedicineSouthwest UniversityChongqingChina
| | - Honglei Ding
- Laboratory of Veterinary MycoplasmologyCollege of Veterinary MedicineSouthwest UniversityChongqingChina
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Aguilar-Gómez NE, Merida-Vieyra J, Isunza-Alonso OD, Morales-Pirela MG, Colín-Martínez O, Juárez-Benítez EJ, García de la Puente S, Aquino-Andrade A. Surveillance of osteoarticular infections caused by Staphylococcus aureus in a paediatric hospital in Mexico City. Front Cell Infect Microbiol 2022; 12:999268. [PMID: 36569208 PMCID: PMC9774039 DOI: 10.3389/fcimb.2022.999268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/20/2022] [Indexed: 12/13/2022] Open
Abstract
Staphylococcus aureus is the main aetiologic agent of osteoarticular infections (OAIs) in paediatric patients. The aim of this prospective unicenter study was to describe the phenotypic and genotypic characteristics of S. aureus isolates obtained from OAIs in paediatric patients admitted to tertiary care hospital. Through a surveillance program called OsteoCode, a multidisciplinary team was created and we identified 27 patients with OAIs caused by S. aureus from 2019 to 2021. The susceptibility profile, virulence factors, biofilm formation, pulsed-field gel electrophoresis (PFGE), clonal complex (CC) and sequence type (ST) were determined. In addition, the clinical characteristics and evolution of the patients presented six months after the diagnosis of OAIs were described. Ninety-two percent of the isolates were methicillin-sensitive S. aureus (MSSA). In methicillin-resistant S. aureus (MRSA), SCCmec-II and SCCmec-V were detected. The pvl gene was only observed in MSSA (18.5%) and was associated with highest fever (p=0.015), multiple localization (p=0.017), and soft tissue sites of infection beyond the bone (pyomyositis, pulmonary abscess) (p=0.017). Biofilm formation was detected in 55.6% of isolates. The most common CC were CC5 and CC30 which represent the most common linages for bone and joint infections worldwide. The isolates were distributed in different STs, and ST672 was predominant. MRSA were associated with a longer duration of intravenous treatment and a prolonged hospital stay (p=0.023). Recurrent infection occurred in five children and orthopaedic complications in 33.3% of patients. This is the first study that reflects the epidemiology of S. aureus in OAIs in paediatric patients in Mexico; a clear predominance of MSSA distributed in different STs was observed. Our findings highlight that a multidisciplinary team is required for the diagnosis and treatment of OAIs.
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Affiliation(s)
| | - Jocelin Merida-Vieyra
- Molecular Microbiology Laboratory, Instituto Nacional de Pediatria, Mexico City, Mexico
| | | | | | - Oscar Colín-Martínez
- Department of Orthopaedic Surgery, Instituto Nacional de Pediatria, Mexico City, Mexico
| | | | | | - Alejandra Aquino-Andrade
- Molecular Microbiology Laboratory, Instituto Nacional de Pediatria, Mexico City, Mexico,*Correspondence: Alejandra Aquino-Andrade,
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Muñoz-Gallego I, Viedma E, Esteban J, Mancheño-Losa M, García-Cañete J, Blanco-García A, Rico A, García-Perea A, Ruiz Garbajosa P, Escudero-Sánchez R, Sánchez Somolinos M, Marín Arriaza M, Romanyk J, Barbero JM, Arribi Vilela A, González Romo F, Pérez-Jorge C, M. Arana D, Monereo A, Domingo D, Cordero J, Sánchez Romero MI, García Viejo MÁ, Lora-Tamayo J, Chaves F. Genotypic and Phenotypic Characteristics of Staphylococcus aureus Prosthetic Joint Infections: Insight on the Pathogenesis and Prognosis of a Multicenter Prospective Cohort. Open Forum Infect Dis 2020; 7:ofaa344. [PMID: 33005695 PMCID: PMC7519778 DOI: 10.1093/ofid/ofaa344] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 08/08/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Staphylococcus aureus is the leading cause of prosthetic joint infection (PJI). Beyond the antibiogram, little attention has been paid to the influence of deep microbiological characteristics on patient prognosis. Our aim was to investigate whether microbiological genotypic and phenotypic features have a significant influence on infection pathogenesis and patient outcome. METHODS A prospective multicenter study was performed, including all S. aureus PJIs (2016-2017). Clinical data and phenotypic (agr functionality, β-hemolysis, biofilm formation) and genotypic characteristics of the strains were collected. Biofilm susceptibility to antimicrobials was investigated (minimal biofilm eradication concentration [MBEC] assay). RESULTS Eighty-eight patients (39.8% men, age 74.7 ± 14.1 years) were included. Forty-five had early postoperative infections (EPIs), 21 had chronic infections (CPIs), and 19 had hematogenous infections (HIs). Twenty (22.7%) were caused by methicillin-resistant S. aureus. High genotypic diversity was observed, including 16 clonal complexes (CCs), with CC5 being the most frequent (30.7%). agr activity was greater in EPI than CPI (55.6% vs 28.6%; P = .041). Strains causing EPI were phenotypically and genotypically similar, regardless of symptom duration. Treatment failure (36.5%) occurred less frequently among cases treated with implant removal. In cases treated with debridement and implant retention, there were fewer failures among those who received combination therapy with rifampin. No genotypic or phenotypic characteristics predicted failure, except vancomycin minimal inhibitory concentration ≥1.5 mg/L (23.1% failure vs 3.4%; P = .044). MBEC50 was >128 mg/L for all antibiotics tested and showed no association with prognosis. CONCLUSIONS S. aureus with different genotypic backgrounds is capable of causing PJI, showing slight differences in clinical presentation and pathogenesis. No major microbiological characteristics were observed to influence the outcome, including MBEC.
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Affiliation(s)
- Irene Muñoz-Gallego
- Servicio de Microbiología, Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain
| | - Esther Viedma
- Servicio de Microbiología, Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Ministerio de Ciencia e Innovación, Sevilla, Spain
| | - Jaime Esteban
- Servicio de Microbiología, IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - Mikel Mancheño-Losa
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain
- Servicio de Medicina Interna, Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid, Spain
| | - Joaquín García-Cañete
- Servicio de Medicina Interna-Urgencias, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
| | - Antonio Blanco-García
- Servicio de Medicina Interna-Urgencias, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
| | - Alicia Rico
- Servicio de Medicina Interna, Hospital Universitario La Paz, Madrid, Spain
| | | | - Patricia Ruiz Garbajosa
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Ministerio de Ciencia e Innovación, Sevilla, Spain
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Rosa Escudero-Sánchez
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Ministerio de Ciencia e Innovación, Sevilla, Spain
- Servicio de Enfermedades Infecciosas, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Mar Sánchez Somolinos
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Mercedes Marín Arriaza
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- CIBER de Enfermedades Respiratorias (CIBERES CB06/06/0058), Madrid, Spain
| | - Juan Romanyk
- Servicio de Microbiología, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - José María Barbero
- Servicio de Medicina Interna, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - Ana Arribi Vilela
- Servicio de Microbiología, Hospital Clínico San Carlos, Madrid, Spain
| | | | - Conchita Pérez-Jorge
- Servicio de Microbiología, Hospital Universitario Rey Juan Carlos, Móstoles, Madrid, Spain
| | - David M. Arana
- Servicio de Microbiología, Hospital Universitario de Getafe, Getafe, Madrid, Spain
| | - Alfonso Monereo
- Servicio de Medicina Interna, Hospital Universitario de Getafe, Getafe, Madrid, Spain
| | - Diego Domingo
- Servicio de Microbiología, Hospital Universitario de La Princesa, Madrid, Spain
| | - José Cordero
- Servicio de Traumatología, Hospital Universitario de La Princesa, Madrid, Spain
| | | | | | - Jaime Lora-Tamayo
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Ministerio de Ciencia e Innovación, Sevilla, Spain
- Servicio de Medicina Interna, Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid, Spain
| | - Fernando Chaves
- Servicio de Microbiología, Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Ministerio de Ciencia e Innovación, Sevilla, Spain
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Muñoz-Gallego I, Lora-Tamayo J, Pérez-Montarelo D, Brañas P, Viedma E, Chaves F. Influence of molecular characteristics in the prognosis of methicillin-resistant Staphylococcus aureus prosthetic joint infections: beyond the species and the antibiogram. Infection 2017; 45:533-537. [PMID: 28389926 DOI: 10.1007/s15010-017-1011-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/20/2017] [Indexed: 11/28/2022]
Abstract
We have explored the relationship of phenotypic (antibiogram, β-haemolysis, agr functionality, biofilm formation) and genotypic characteristics on the prognosis of 18 cases of methicillin-resistant S. aureus prosthetic joint infection (2005-2015). All isolates belonged to CC5, and had agr type II. This pilot study suggests that phage-borne genes belonging to the immune evasion cluster (chp, sak and scn) were more frequent among episodes with treatment failure (80.0 vs. 37.5%).
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Affiliation(s)
- Irene Muñoz-Gallego
- Servicio de Microbiología, Instituto de Investigación Biomédica Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Jaime Lora-Tamayo
- Unidad de Enfermedades Infecciosas, Instituto de Investigación Biomédica Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Avenida de Córdoba sn, Madrid, 28041, Spain.
| | - Dafne Pérez-Montarelo
- Servicio de Microbiología, Instituto de Investigación Biomédica Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Patricia Brañas
- Servicio de Microbiología, Instituto de Investigación Biomédica Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Esther Viedma
- Servicio de Microbiología, Instituto de Investigación Biomédica Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Fernando Chaves
- Servicio de Microbiología, Instituto de Investigación Biomédica Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
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Lin J, Xu P, Peng Y, Lin D, Ou Q, Zhang T, Bai C, Ye X, Zhou J, Yao Z. Prevalence and characteristics of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus nasal colonization among a community-based diabetes population in Foshan, China. J Diabetes Investig 2016; 8:383-391. [PMID: 27808480 PMCID: PMC5415482 DOI: 10.1111/jdi.12591] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 10/24/2016] [Accepted: 10/30/2016] [Indexed: 12/18/2022] Open
Abstract
Aims/Introduction Evidence suggests that diabetes might cause an increase in colonization of Staphylococcus aureus (S. aureus) and methicillin‐resistant S. aureus (MRSA) in community settings. We carried out a cross‐sectional study to determine the prevalence and influencing factors of S. aureus and MRSA nasal colonization among a community‐based diabetes population, and to identify the characteristics of the isolated strains. Materials and Methods A total of 956 participants from 11 community settings were included in the study. Results Of the 529 diabetes participants, 46 were colonized with S. aureus and 22 were colonized with MRSA. Of the 427 non‐diabetes participants, 25 were colonized with S. aureus and 12 were colonized with MRSA. Men (odds ratio 0.45, 95% confidence interval 0.20–0.99, P = 0.047) were less likely to have S. aureus nasal colonization, and those with well‐controlled blood glucose (odds ratio 2.04, 95% confidence interval 1.01–4.13, P = 0.047) among the diabetes population were more likely to have S. aureus nasal colonization. The proportion of multidrug‐resistant S. aureus strains in the diabetes population (52.17%) was higher than that in the non‐diabetes population (28.00%; χ2 = 3.848, P = 0.050). The most common clonal complex type and Staphylococcal chromosome cassette mec type of MRSA in diabetes population was clonal complex 5 (40.91%) and type IV (27.27%), respectively. The proportion of Panton–Valentine leukocidin gene in MRSA strains was 17.65%. There was great sequence type diversity in MRSA strains. Conclusions The prevalence of MRSA in the community‐based diabetes population was moderate, and the high proportions of multidrug‐resistant S. aureus strains and diverse molecular characteristics in the diabetes population should be noticed.
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Affiliation(s)
- Jialing Lin
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ping Xu
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yang Peng
- left for Chronic Disease, University of Queensland, Brisbane, Queensland, Australia
| | - Dongxin Lin
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qianting Ou
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ting Zhang
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Chan Bai
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiaohua Ye
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Junli Zhou
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Zhenjiang Yao
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou, China
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Antibiofilm Activity of Low-Amperage Continuous and Intermittent Direct Electrical Current. Antimicrob Agents Chemother 2015; 59:4610-5. [PMID: 26014944 DOI: 10.1128/aac.00483-15] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 05/17/2015] [Indexed: 12/13/2022] Open
Abstract
Bacterial biofilms are difficult to treat using available antimicrobial agents, so new antibiofilm strategies are needed. We previously showed that 20, 200, and 2,000 μA of electrical current reduced bacterial biofilms of Staphylococcus aureus, Staphylococcus epidermidis, and Pseudomonas aeruginosa. Here, we tested continuous direct current at lower amperages, intermittent direct current, and combinations of surface materials (Teflon or titanium) and electrode compositions (stainless steel, graphite, titanium, or platinum) against S. aureus, S. epidermidis, and P. aeruginosa biofilms. In addition, we tested 200 or 2,000 μA for 1 and 4 days against biofilms of 33 strains representing 13 species of microorganisms. The logarithmic reduction factor was used to measure treatment effects. Using continuous current delivery, the lowest active amperage was 2 μA for 1, 4, or 7 days against P. aeruginosa and 5 μA for 7 days against S. epidermidis and S. aureus biofilms. Delivery of 200 μA for 4 h a day over 4 days reduced P. aeruginosa, S. aureus, and S. epidermidis biofilms on Teflon or titanium discs. A reduction of P. aeruginosa, S. aureus, and S. epidermidis biofilms was measured for 23 of 24 combinations of surface materials and electrode compositions tested. Four days of direct current delivery reduced biofilms of 25 of 33 strains studied. In conclusion, low-amperage current or 4 h a day of intermittent current delivered using a variety of electrode compositions reduced P. aeruginosa, S. aureus, and S. epidermidis biofilms on a variety of surface materials. The electricidal effect was observed against a majority of bacterial species studied.
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