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Lopez AE, Mayoral J, Cianciotto NP. Complete Genome Sequence of Legionella cardiaca Strain H63 T, Isolated from a Case of Native Valve Endocarditis. Microbiol Resour Announc 2023; 12:e0017523. [PMID: 37310280 PMCID: PMC10353460 DOI: 10.1128/mra.00175-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/30/2023] [Indexed: 06/14/2023] Open
Abstract
We report the complete genome sequence of Legionella cardiaca strain H63T, which had been isolated from aortic valve tissue from a patient with native endocarditis. The genome assembly contains a single 3,477,232-bp contig, with a G+C content of 38.59%, and is predicted to encode 2,948 proteins.
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Affiliation(s)
- Alberto E. Lopez
- Department of Microbiology and Immunology, Northwestern University Medical School, Chicago, Illinois, USA
| | - Joshua Mayoral
- Department of Microbiology and Immunology, Northwestern University Medical School, Chicago, Illinois, USA
| | - Nicholas P. Cianciotto
- Department of Microbiology and Immunology, Northwestern University Medical School, Chicago, Illinois, USA
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Cai X, Yu N, Ma J, Li WY, Xu M, Li E, Zhang M, Wang W, Chen Y, Kang J. Altered pulmonary capillary permeability in immunosuppressed guinea pigs infected with Legionella pneumophila serogroup 1. Exp Ther Med 2019; 18:4368-4378. [PMID: 31772633 PMCID: PMC6861873 DOI: 10.3892/etm.2019.8102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 08/16/2019] [Indexed: 12/14/2022] Open
Abstract
In immunosuppressed hosts, Legionella pneumophila (Lp) infection usually develops into severe pneumonia, which is pathologically characterized by increased vascular permeability and pulmonary edema. At present, mechanisms associated with changes in pulmonary capillary permeability (PCP) and the pathogenesis of pulmonary edema in immunosuppressed hosts with Lp infection are unclear. Therefore, in the present study an animal model of normal and immunosuppressed guinea pigs infected with Lp was established. An isolated perfused lung system was used to investigate the extent of changes in PCP. Pathological and immunofluorescence examinations were performed to explore the mechanism underlying these changes. The results indicated that PCP increased with the highest magnitude in immunosuppressed guinea pigs infected with Lp, with repeated ANOVA indicating synergism between infection and immunosuppression (P=0.0444). Hematoxylin and eosin staining and electron microscopy revealed more severe morphological damages in the lung tissues and pulmonary capillaries of the immunosuppressed animals infected with Lp compared with normal animals infected with Lp. Immunofluorescence analysis showed that immunosuppression reduced the expression of the vascular endothelial cell junction protein VE-cadherin (P=0.027). Following Lp infection, VE-cadherin expression was significantly lower in the immunosuppressed guinea pigs compared with their immunocompetent counterparts (P=0.001). These results suggest that immunosuppression combined with Lp infection induces more significant damage to pulmonary capillaries compared with Lp infection alone, resulting in a significantly increased PCP.
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Affiliation(s)
- Xu Cai
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Na Yu
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Jiangwei Ma
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Wen-Yang Li
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Mingtao Xu
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Erran Li
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Min Zhang
- Department of Respiratory Medicine, Heilongjiang Provincial Hospital, Harbin, Heilongjiang 150036, P.R. China
| | - Wei Wang
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yu Chen
- Department of Respiratory Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
| | - Jian Kang
- Department of Respiratory Medicine, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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Franco-Garcia A, Varughese TA, Lee YJ, Papanicolaou G, Rosenblum MK, Hollmann TJ, Koehne G, Boulad F, Babady NE, Tang YW, Seo SK. Diagnosis of Extrapulmonary Legionellosis in Allogeneic Hematopoietic Cell Transplant Recipients by Direct 16S Ribosomal Ribonucleic Acid Sequencing and Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. Open Forum Infect Dis 2017; 4:ofx140. [PMID: 28852679 PMCID: PMC5570015 DOI: 10.1093/ofid/ofx140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 07/10/2017] [Indexed: 11/15/2022] Open
Abstract
Identifying extrapulmonary legionellosis is difficult due to the lack of clinical suspicion and limitations of conventional microbiologic methods. We present a case series of hematopoietic cell transplant recipients with extrapulmonary legionellosis diagnosed via molecular diagnostics: 16S ribosomal ribonucleic acid gene Sanger sequencing and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.
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Affiliation(s)
| | | | - Yeon Joo Lee
- Infectious Diseases Service, Department of Medicine
| | | | | | | | - Guenther Koehne
- Adult Bone Marrow Transplantation Service, Department of Medicine
| | - Farid Boulad
- Bone Marrow Transplantation Service, Department of Pediatrics, and
| | - N Esther Babady
- Clinical Microbiology Service, Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Yi-Wei Tang
- Clinical Microbiology Service, Department of Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Susan K Seo
- Infectious Diseases Service, Department of Medicine
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