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Yang M, Liu D, Li X, Xiao C, Mao Y, He J, Feng J, Wang L. Characterizations of blaCTX-M-14 and blaCTX-M-64 in a clinical isolate of Escherichia coli from China. Front Microbiol 2023; 14:1158659. [PMID: 37649630 PMCID: PMC10464524 DOI: 10.3389/fmicb.2023.1158659] [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: 02/04/2023] [Accepted: 05/02/2023] [Indexed: 09/01/2023] Open
Abstract
Extended-spectrum beta-lactamase-producing Gram-negative bacteria are common in the community and hospitals. To monitor ESBLs mediated by the CTX-M genotype, we collected clinical ESBL pathogenic strains from a hospital in central China and observed a strain of Escherichia coli, namely Ec15103 carrying blaCTX-M-14, blaCTX-M-64 and blaTEM-1, isolated from the blood of a 7-day-old infant in 2015. Strain Ec15103 contains two drug resistance plasmids: pEc15103A, an IncFI-type plasmid that cannot be conjugatively transferred and carries the drug resistance genes blaTEM-1, aacC2, aadA5, sul1, mph(A), sul2, strAB, and tetA(A); and pEc15103B, an IncK2/Z-type plasmid that carries the conjugation transfer gene and blaCTX-M-14. In addition, blaCTX-M-64 is located on the chromosome of Ec15103, and it is the first report of pathogen with blaCTX-M-64 located on its chromosome (the search terms used "blaCTX-M-64" and "chromosome"). blaCTX-M-14 and blaCTX-M-64 are carried by ISEcp1-mediated transposon Tn6503a and Tn6502, respectively. The conjugation transfer ability of pEc15103B was significantly inhibited by zidovudine (AZT) and linoleic acid (LA) and that expression of blaCTX-M-14, blaCTX-M-64 and blaTEM-1 at the mRNA level did not change based on the concentration of cefotaxime or ampicillin. Co-occurrence of blaCTX-M-14 and blaCTX-M-64 in a single isolate will enhance the drug resistance of bacteria, and the presence of blaCTX-M-64 in the chromosome may make the resistance more maintain. This fact will facilitate its dissemination and persistence under different antimicrobial selection pressures. It is essential to prevent these strains from further spreading in a hospital environment.
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Affiliation(s)
- Mingxing Yang
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Dong Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Xiaoquan Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Chuting Xiao
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Yingge Mao
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Jiaqi He
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
| | - Jiao Feng
- Institute of Biomedical Sciences, The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education of China, The Key Laboratory of Medical Molecular Cell Biology of Shanxi Province, Shanxi University, Taiyuan, China
| | - Li Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University, Kaifeng, China
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Yan Z, Deng W, Wang Y, Liu Y, Sun H, Xia R, Zeng W, Geng J, Chen G, He X, Xu J, Wu CL, Miao Y. Case Report: Malacoplakia Due to E. coli With Cryptococcus albidus Infection of a Transplanted Kidney in a Patient With Recurrent Urinary Tract Infection. Front Med (Lausanne) 2021; 8:721145. [PMID: 34595189 PMCID: PMC8476786 DOI: 10.3389/fmed.2021.721145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 08/20/2021] [Indexed: 11/24/2022] Open
Abstract
Background: Colonization of Cryptococcus rarely occurs in a graft. This study reports a case of malacoplakia and cryptococcoma caused by E. coli and Cryptococcus albidus in a transplanted kidney, with detailed pathology and metagenome sequencing analysis. Case Presentation: We presented a case of cryptococcoma and malacoplakia in the genitourinary system including the transplant kidney, bladder, prostate, and seminal vesicles caused by Cryptococcus albidus and Escherichia coli in a renal-transplant recipient. Metagenome sequencing was conducted on a series of samples obtained from the patient at three different time points, which we termed Phase I (at the diagnosis of cryptococcoma), Phase II (during perioperative period of graftectomy, 3 months after the diagnosis), and Phase III (2 months after graftectomy). Sequencing study in the Phase I detected two and four sequences of C. albidus respectively in cerebrospinal fluid (CSF) and feces, with resistant Escherichia coli 09-02E presented in urine and renal mass. A 3-month antibiotic treatment yielded a smaller bladder lesion but an enlarged allograft lesion, leading to a nephrectomy. In the Phase II, two sequences of C. albidus were detected in CSF, while the E. coli 09-02E continued as before. In the Phase III, the lesions were generally reduced, with one C. albidus sequence in feces only. Conclusions: The existence and clearance of Cryptococcus sequences in CSF without central nervous system symptoms may be related to the distribution of infection foci in vivo, the microbial load, and the body's immunity. Overall, this study highlights the need for enhanced vigilance against uncommon types of Cryptococcus infections in immunocompromised populations and increased concern about the potential correlation between E. coli and Cryptococcus infections.
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Affiliation(s)
- Ziyan Yan
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Wenfeng Deng
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yuchen Wang
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yanna Liu
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Hengbiao Sun
- Department of Laboratory, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Renfei Xia
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Wenli Zeng
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jian Geng
- Department of Pathology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Gui Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Xiaolong He
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Microbiology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Jian Xu
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chin-Lee Wu
- Departments of Urology and Pathology, Harvard Medical School, Massachusetts General Hospital, Boston, MA, United States
| | - Yun Miao
- Department of Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, China
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