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Goudarzi H, Goudarzi M, Sabzehali F, Fazeli M, Salimi Chirani A. Genetic analysis of methicillin‐susceptible
Staphylococcus aureus
clinical isolates: High prevalence of multidrug‐resistant ST239 with strong biofilm‐production ability. J Clin Lab Anal 2020; 34:e23494. [PMID: 32696587 PMCID: PMC7676197 DOI: 10.1002/jcla.23494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/28/2020] [Accepted: 07/03/2020] [Indexed: 01/08/2023] Open
Abstract
Background The distributions of methicillin‐susceptible Staphylococcus aureus (MSSA) are divers geographically with different genetic backgrounds. Data related to molecular characteristics of MSSA compare to methicillin‐resistant Staphylococcus aureus (MRSA) is sparse. Methods In this cross‐sectional study, antimicrobial susceptibility testing, virulence genes analysis, biofilm formation, accessory gene regulator (agr) typing, and multilocus sequence typing (MLST) characterized on 75 MSSA isolates. Results Multidrug‐resistance MSSA was found to be 84%. Forty‐eight (64%) isolates were toxinogenic with 34 and 14 isolates carrying pvl and tst representing 45.3% and 18.7%. The most common SE genes were sed (20%), sec (16%), and sea (16%). Fifty‐five (73.3%) isolates were confirmed as biofilm producer with a markedly high prevalence of fnbA (93.3%), fnbB (86.7%), icaA (65.3%), icaD (53.3%), can (24%), ebp (10.7%), and bap (1.3%). A total of 3 agr types (I, 73.3%; III, 16%; II, 10.7%) and 4 clonal complexes (CCs) and sequence types (STs), namely CC8/ST293 (45.3%), CC/ST22 (28%), CC/ST30 (16%), and CC/ST5 (10.7%) were detected in this study. All the high and low‐level mupirocin resistance strains belonged to ST239 and ST22 strains, respectively. All the fusidic acid‐resistant isolates carried fusC and belonged to ST30. Conclusions These findings indicated that ST239 with strong biofilm production ability is the most common type in MSSA strains isolated from patients. It seems that the antimicrobial resistance profiles, toxin, and biofilm formation were closely associated with specific STs. Further studies are required to identify and control of these clonal lineages in our area.
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Affiliation(s)
- Hossein Goudarzi
- Department of Microbiology School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Mehdi Goudarzi
- Department of Microbiology School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Fattaneh Sabzehali
- Department of Microbiology School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Maryam Fazeli
- Department of Virology Pasteur Institute of Iran Tehran Iran
| | - Alireza Salimi Chirani
- Department of Microbiology School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran
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Tayebi Z, Goudarzi H, Dadashi M, Goudarzi M. Genotype distribution of methicillin-susceptible Staphylococcus aureus clinical isolates in Iran: high multiresistant clonal complex 8. BMC Res Notes 2020; 13:277. [PMID: 32513293 PMCID: PMC7282160 DOI: 10.1186/s13104-020-05127-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 06/04/2020] [Indexed: 12/17/2022] Open
Abstract
Objective Compared to methicillin-resistant Staphylococcus aureus (MRSA), there have been few studies focused on the molecular characterization of methicillin-susceptible Staphylococcus aureus (MSSA). In this cross-sectional study, 85 MSSA isolates were characterized by antimicrobial susceptibility testing, virulence genes analysis, accessory gene regulator (agr) typing, and S. aureus protein A locus (spa) typing. Results In present study, 9 different clonal complexes namely CC8-MSSA-t037 (22.4%), CC8-MSSA-t008 (11.8%), CC7-MSSA-t091 and CC30-MSSA-t021 (each 9.4%), CC8-MSSA-t037 (8.3%), CC398-MSSA-t034 (7.1%), CC22-MSSA-t005 (5.9%), CC5-MSSA-t002 and CC15-MSSA-t084 (each 4.7%), CC22-MSSA-t790 and CC59-MSSA-t437 (each 3.5%), CC22-MSSA-t1869, CC5-MSSA-t045, and CC45-MSSA-t015 (each 2.3%), CC30-MSSA-t318 and CC15-MSSA-t491 (each 1.2%) were found. agr types detected in tested strains were mainly type I (76.5%), II (12.9%), and III (10.6%). Of 85 MSSA examined isolates, 48 (56.5%) isolates were toxinogenic with 27 producing pvl (31.8%) and 21 tst (24.7%). The findings of the study show a high genetic diversity in MSSA strains warranting continued surveillance to provide critical insights into control and treatment of MSSA infections.
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Affiliation(s)
- Zahra Tayebi
- Microbiology Department, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Hossein Goudarzi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masoud Dadashi
- Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Mehdi Goudarzi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Park SG, Lee HS, Park JY, Lee H. Molecular Epidemiology of Staphylococcus aureus in Skin and Soft Tissue Infections and Bone and Joint Infections in Korean Children. J Korean Med Sci 2019; 34:e315. [PMID: 31858755 PMCID: PMC6926099 DOI: 10.3346/jkms.2019.34.e315] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/28/2019] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Community acquired-methicillin resistant Staphylococcus aureus (MRSA) clones, including ST1, ST8, and ST30 are reported worldwide. However, data among Korean children are limited. Thus, we investigated the molecular characteristics of S. aureus among children in Korea. METHODS S. aureus isolated from Korean children diagnosed with skin and soft tissue infection (SSTI) or bone and joint infection due to S. aureus infection at Seoul National University Bundang Hospital, from August 2010 to November 2016, were analyzed for multilocus sequence type (ST) and SCCmec typing. Polymerase chain reaction of Panton-Valentine leukocidin (PVL), qac A/B, smr and mupA genes were also performed. Electronic medical records were reviewed for clinical data and antibiotic susceptibility results. Cases were classified into three groups: health care-associated community-onset (HACO) infections, hospital-onset (HO) infections, and community-acquired (CA) infections. RESULTS A total of 67 strains from children with SSTI (41/67, 61.2%) and bone and joint infection (26/67, 38.8%) were included. Among all isolates, 29.9% (20/67) were MRSA, and 70% (14/20) were classified as CA, 20% (4/20) as HACO and 10% (2/20) as HO infections. MRSA rate according to disease was 34.1% (14/41) for SSTI and 23.1% (6/26) for bone and joint infection. MRSA strains included ST72-SCCmec IV (14/20, 70.0%), ST5-SCCmec II (3/20, 15.0%) and ST1-SCCmec IV (2/20, 10.0%). ST30 was the most common cause of SSTI and bone and joint infections and 96.6% (28/29) were methicillin-susceptible Staphylococcus aureus (MSSA). PVL genes were detected in 3 strains (3.8%, ST30-SCCmec IV n = 1, MSSA ST30 n = 2), qac A/B in 3 (MRSA = 3), smr in 3 (MSSA = 1, MRSA = 2) and mupA in 7 (MRSA = 5, MSSA = 2). CONCLUSION Molecular epidemiology of S. aureus in Korean children with SSTI and bone and joint infection showed that ST30 was predominant and mostly MSSA. Among MRSA, ST72-SCCmec type IV was the most common strain.
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Affiliation(s)
- Seul Gi Park
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Pediatrics, Seoul National University Hospital, Seoul, Korea
| | - Hyun Seung Lee
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Pediatrics, Seoul National University Hospital, Seoul, Korea
| | - Ji Young Park
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hyunju Lee
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea.
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Bae E, Kim CK, Jang JH, Sung H, Choi Y, Kim MN. Impact of Community-Onset Methicillin-Resistant Staphylococcus aureus on Staphylococcus aureus Bacteremia in a Central Korea Veterans Health Service Hospital. Ann Lab Med 2019; 39:158-166. [PMID: 30430778 PMCID: PMC6240515 DOI: 10.3343/alm.2019.39.2.158] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 05/18/2018] [Accepted: 10/04/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND No study has examined the epidemiology of methicillin-resistant Staphylococcus aureus (MRSA) bacteremia in Korean veterans' hospitals. We investigated the microbiological and clinical epidemiology of S. aureus bacteremia at the central Veterans Health Services (VHS) hospital in Korea. METHODS Patients with S. aureus bacteremia were consecutively enrolled from February to August 2015. Bacteremia was classified as hospital-acquired (HA), community-onset healthcare-associated (COHA), or community-acquired (CA). MRSA bacteremia risk factors were analyzed. Species identification, antimicrobial susceptibility, and presence of luk and tst were tested. Staphylococcal cassette chromosome mec (SCCmec) typing, spa sequence typing agr polymorphism typing, and multilocus sequence typing were performed. Biofilm production and δ-hemolysin activity were measured to determine agr function. RESULTS In total, 60 patients were enrolled (30 HA, 23 COHA, and seven CA bacteremia); 44 (73.3%) had MRSA bacteremia (26 HA, 16 COHA, and two CA). MRSA bacteremia occurred more frequently in non-CA patients and those who had received antibiotic treatment within the past month (P<0.05). The major MRSA strains comprised 24 ST5-agr2-SCCmecII, 11 ST72-agr 1-SCCmecIV, and five ST8-agr1-SCCmecIV strains. Of 26 agr2-SCCmecII strains, including two MSSA strains, 25 were multidrug-resistant, 18 were tst-positive, and 13 were agr-defective, whereas only five of the 18 agr1-SCCmecIV strains were multidrug-resistant, and all were tst-negative and agr-intact. agr1-SCCmecIV and ST8-agr1-SCCmecIV strains were more likely than agr2-SCCmecII strains to be COHA. CONCLUSIONS MRSA was highly prevalent in both COHA and HA bacteremia. The introduction of virulent CA-MRSA strains may be an important cause of increased HA-MRSA bacteremia in VHS hospitals.
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Affiliation(s)
- Eunsin Bae
- Department of Laboratory Medicine, Veterans Health Service Medical Center, Seoul, Korea
| | - Choon Kwan Kim
- Department of Internal Medicine, Veterans Health Service Medical Center, Seoul, Korea
| | - Jung Hyun Jang
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea
| | - Heungsup Sung
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea
| | - YounMi Choi
- Department of Laboratory Medicine, Veterans Health Service Medical Center, Seoul, Korea.
| | - Mi Na Kim
- Department of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea.
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Moon DC, Jeong SK, Hyun BH, Lim SK. Prevalence and Characteristics of Methicillin-Resistant Staphylococcus aureus Isolates in Pigs and Pig Farmers in Korea. Foodborne Pathog Dis 2018; 16:256-261. [PMID: 30481071 DOI: 10.1089/fpd.2018.2509] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, we investigated the prevalence and characteristics of methicillin-resistant Staphylococcus aureus (MRSA) isolates from pigs and pig farmers in Korea. A total of 1245 nasal swabs were collected from pigs and farmers at 53 pig farms in nine provinces from 2012 to 2016. The prevalence of MRSA was 7.9% (88/1119) in pigs and 16.7% (21/126) in farmers. Among 119 farmers working on conventional farms, 21 (17.6%) tested positive for MRSA. However, no MRSA was detected in either pigs or farmers at four organic farms. The individual pig-level prevalence of MRSA differed between age groups, with the percentage of positive samples being highest in weaners (17.3%), followed by growers (9.0%), piglets (6.5%), finishers (4.4%), and sows (0%). Two different lineages of MRSA were detected among the 109 isolates from pigs and farmers: (1) livestock-associated types of MRSA belonging to 27 isolates of ST541-t034-V, 24 isolates of ST398-t571-V, 17 isolates of ST398-t034 variant (G420A)-V, and one isolate of ST541-t8588-V; and (2) community-associated types of MRSA belonging to 21 isolates of ST188-t189-IV, 14 isolates of ST72-t324-IV, three isolates of ST72-t664-IV, one isolate of ST72-t148-IV, and one isolate of ST72-t5440-IV. Identical genotypes were detected in both pigs and farmers at six farms. New MRSA clones were isolated from pigs (ST398-t034 (G420A)-V, ST188-t189-IV, and ST398-t571-V) and pig farmers (ST541-t8588-V and ST72-t5440-IV). The prevalence of MRSA was also correlated with antibiotic usage, and the clones showed diversification between pigs and farmers. Ultimately, the increased frequency and diversification of livestock-associated MRSA could be a potential threat to public health in Korea. To our knowledge, this is the first study to report the prevalence and characteristics of MRSA in pigs and pig farmers in Korea.
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Affiliation(s)
- Dong Chan Moon
- 1 Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si , Republic of Korea
| | - Soo Kwan Jeong
- 2 Yang Ju Livestock Industry Cooperatives , Gyeonggi, Republic of Korea
| | - Bang-Hun Hyun
- 1 Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si , Republic of Korea
| | - Suk-Kyung Lim
- 1 Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si , Republic of Korea
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Jeon H, Ma SH, Jo HJ, Woo MS, An H, Park H, Kwon C, Kim Y, Lee JC. Long-term persistence of sequence type 89 methicillin-resistant Staphylococcus aureus isolated from cases of staphylococcal scalded skin syndrome in a Korean community. J Med Microbiol 2016; 65:1542-1544. [PMID: 27902366 DOI: 10.1099/jmm.0.000373] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Hyejin Jeon
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Sang Hyuk Ma
- Department of Pediatrics, Changwon Fatima Hospital, Changwon, Kyungnam, Republic of Korea
| | - Hyun Jin Jo
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Min-Seok Woo
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Hyeonjun An
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Hyungsik Park
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Choongeun Kwon
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Youjeong Kim
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | - Je Chul Lee
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Republic of Korea
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Kim SY, Park SH, Hwang SM. Prevalence and Molecular Characteristics of Methicillin-resistantStaphylococcus aureusIsolates in a Neonatal Intensive Care Unit. ACTA ACUST UNITED AC 2016. [DOI: 10.4167/jbv.2016.46.2.99] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Sun Young Kim
- Department of Clinical Laboratory Science, Catholic University of Pusan, Korea
| | - So Hae Park
- Department of Clinical Laboratory Science, Catholic University of Pusan, Korea
| | - Soo Myung Hwang
- Department of Clinical Laboratory Science, Catholic University of Pusan, Korea
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