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Puah SM, Khor WC, Aung KT, Lau TTV, Puthucheary SD, Chua KH. Aeromonas dhakensis: Clinical Isolates with High Carbapenem Resistance. Pathogens 2022; 11:833. [PMID: 35894056 DOI: 10.3390/pathogens11080833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 02/01/2023] Open
Abstract
Aeromonas dhakensis is ubiquitous in aquatic habitats and can cause life-threatening septicaemia in humans. However, limited data are available on their antimicrobial susceptibility testing (AST) profiles. Hence, we aimed to examine their AST patterns using clinical (n = 94) and non-clinical (n = 23) isolates with dehydrated MicroScan microdilution. Carbapenem resistant isolates were further screened for genes related to carbapenem resistance using molecular assay. The isolates exhibited resistance to imipenem (76.9%), doripenem (62.4%), meropenem (41.9%), trimethoprim/sulfamethoxazole (11.1%), cefotaxime (8.5%), ceftazidime (6%), cefepime (1.7%) and aztreonam (0.9%), whereas all isolates were susceptible to amikacin. Clinical isolates showed significant association with resistance to doripenem, imipenem and meropenem compared to non-clinical isolates. These blacphA were detected in clinical isolates with resistance phenotypes: doripenem (67.2%, 45/67), imipenem (65.9%, 54/82) and meropenem (65.2%, 30/46). Our findings showed that the MicroScan microdilution method is suitable for the detection of carbapenem resistance in both clinical (48.9–87.2%) and non-clinical (4.3–13.0%) isolates. This study revealed that A. dhakensis isolates had relatively high carbapenem resistance, which may lead to potential treatment failure. Continued monitoring of aquatic sources with a larger sample size should be carried out to provide further insights.
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Puah SM, Puthucheary SDA, Chua KH. Virulence Profiles Among Gastrointestinal and Extraintestinal Clinical Isolates of Plesiomonas shigelloides . Jpn J Infect Dis 2022; 75:407-410. [DOI: 10.7883/yoken.jjid.2021.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Suat Moi Puah
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Malaysia
| | | | - Kek Heng Chua
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Malaysia
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Wang Y, Liu H, Zhang L, Sun B. Application of Modified Carbapenem Inactivation Method and Its Derivative Tests for the Detection of Carbapenemase-Producing Aeromonas. Infect Drug Resist 2021; 14:3949-3960. [PMID: 34594118 PMCID: PMC8478511 DOI: 10.2147/idr.s330115] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/02/2021] [Indexed: 12/17/2022] Open
Abstract
PURPOSE Infection and transmission of carbapenem-resistant Aeromonas is a serious threat to public health. Rapid and accurate detection carbapenem-resistant of these organisms is essential for reasonable treatment and infection control. This study aimed to find a simple and effective method to detect carbapenem-resistant phenotype in Aeromonas. METHODS A total of 131 clinical preserved Aeromonas strains were used in this study. The carbapenemase genes were detected by PCR. Modified carbapenem inactivation method (mCIM) in conjunction with EDTA-modified carbapenem inactivation method (eCIM) and simplified carbapenem inactivation method (sCIM) were performed to detect carbapenemases. We also designed a simple method, carbapenem inactivation method using supernatant (CIM-s), to detect the carbapenemase activity in the medium. RESULTS Of the 131 Aeromonas strains, 79 contained carbapenemase genes, including 68 blaCphA , 6 blaKPC-2 , 2 blaNDM-1 and 3 blaKPC-2+CphA . However, routine antibiotic susceptibility testing could not completely identify carbapenemase-producing Aeromonas. In phenotypic assays, the sensitivity and specificity of mCIM were 100%. The combined mCIM and eCIM could distinguish serine carbapenemase and metallo-β-carbapenemases except co-producing organisms. The sensitivity and specificity of sCIM were 92.4% and 100%, respectively, which could not detect CphA totally. CIM-s results indicate that these carbapenemases could secrete into the medium to perform their hydrolytic activities and had a sensitivity and specificity of 97.5% and 100%, respectively. CONCLUSION The combination of mCIM and eCIM can effectively detect and distinguish different types of carbapenemase in Aeromonas, and could be used as an important supplement approach to the antibiotic susceptibility testing.
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Affiliation(s)
- Yunying Wang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Hui Liu
- Department of Blood Transfusion, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Lijun Zhang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Bin Sun
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
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Lau TTV, Puah SM, Tan JAMA, Puthucheary SD, Chua KH. Characterization of the relationship between polar and lateral flagellar genes in clinical Aeromonas dhakensis: phenotypic, genetic and biochemical analyses. Braz J Microbiol 2021; 52:517-529. [PMID: 33768508 DOI: 10.1007/s42770-021-00457-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 02/23/2021] [Indexed: 11/25/2022] Open
Abstract
Flagellar-mediated motility is a crucial virulence factor in many bacterial species. A dual flagellar system has been described in aeromonads; however, there is no flagella-related study in the emergent human pathogen Aeromonas dhakensis. Using 46 clinical A. dhakensis, phenotypic motility, genotypic characteristics (flagellar genes and sequence types), biochemical properties and their relationship were investigated in this study. All 46 strains showed swimming motility at 30 °C in 0.3% Bacto agar and carried the most prevalent 6 polar flagellar genes cheA, flgE, flgG, flgH, flgL, and flgN. On the contrary, only 18 strains (39%) demonstrated swarming motility on 0.5% Eiken agar at 30 °C and they harbored 11 lateral flagellar genes lafB, lafK, lafS, lafT, lafU, flgCL, flgGL, flgNL, fliEL, fliFL, and fliGL. No association was found between biochemical properties and motility phenotypes. Interestingly, a significant association between swarming and strains isolated from pus was observed (p = 0.0171). Three strains 187, 277, and 289 isolated from pus belonged to novel sequence types (ST522 and ST524) exhibited fast swimming and swarming profiles, and they harbored > 90% of the flagellar genes tested. Our findings provide a fundamental understanding of flagellar-mediated motility in A. dhakensis.
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Affiliation(s)
- Tien-Tien Vicky Lau
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Suat-Moi Puah
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | | | - S D Puthucheary
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kek-Heng Chua
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Ramsamy Y, Mlisana KP, Amoako DG, Abia ALK, Allam M, Ismail A, Singh R, Essack SY. Comparative Pathogenomics of Aeromonas veronii from Pigs in South Africa: Dominance of the Novel ST657 Clone. Microorganisms 2020; 8:E2008. [PMID: 33339176 DOI: 10.3390/microorganisms8122008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/13/2020] [Accepted: 12/15/2020] [Indexed: 12/13/2022] Open
Abstract
The pathogenomics of carbapenem-resistant Aeromonas veronii (A. veronii) isolates recovered from pigs in KwaZulu-Natal, South Africa, was explored by whole genome sequencing on the Illumina MiSeq platform. Genomic functional annotation revealed a vast array of similar central networks (metabolic, cellular, and biochemical). The pan-genome analysis showed that the isolates formed a total of 4349 orthologous gene clusters, 4296 of which were shared; no unique clusters were observed. All the isolates had similar resistance phenotypes, which corroborated their chromosomally mediated resistome (blaCPHA3 and blaOXA-12) and belonged to a novel sequence type, ST657 (a satellite clone). Isolates in the same sub-clades clustered according to their clonal lineages and host. Mobilome analysis revealed the presence of chromosome-borne insertion sequence families. The estimated pathogenicity score (Pscore ≈ 0.60) indicated their potential pathogenicity in humans. Furthermore, these isolates carried several virulence factors (adherence factors, toxins, and immune evasion), in different permutations and combinations, indicating a differential ability to establish infection. Phylogenomic and metadata analyses revealed a predilection for water environments and aquatic animals, with more recent reports in humans and food animals across geographies, making A. veronii a potential One Health indicator bacterium.
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Cheok YY, Puah SM, Chua KH, Tan JAMA. Isolation and molecular identification of Aeromonas species from the tank water of ornamental fishes. Acta Vet Hung 2020; 68:130-139. [PMID: 33055305 DOI: 10.1556/004.2020.00029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 03/09/2020] [Indexed: 11/19/2022]
Abstract
Aeromonads are recognised as important pathogens of fishes. In this study, ten water samples were randomly collected from pet shops' fish tanks and home aquaria inhabited by several fish species (silver arowana, koi, goldfish, catfish, pictus fish, silver shark and silver dollar fish). Altogether 298 colonies were isolated using Aeromonas selective agar. A total of 154 isolates were then confirmed as belonging to the genus Aeromonas using the GCAT gene. Using ERIC-PCR, a total of 40 duplicate isolates were excluded from the study and 114 isolates were subjected to PCR-RFLP targeting the RNA polymerase sigma factor (rpoD) gene using lab-on-chip. A total of 13 different Aeromonas species were identified. The most prevalent species were A. veronii (27%, 31/114), followed by A. dhakensis (17%, 19/114), A. finlandiensis (9%, 10/114), A. caviae (8%, 9/114), A. hydrophila (4%, 4/114), A. jandaei (4%, 4/114), A. rivuli (3%, 3/114), A. enteropelogens (2%, 2/114), A. tecta (2%, 2/114), A. allosaccharophila (1%, 1/114), A. eucrenophila (1%, 1/114), A. media (1%, 1/114) and A. diversa (1%, 1/114). Twenty-six isolates (23%) were unidentifiable at species level. The present study demonstrates that Aeromonas species are highly diverse in freshwater fish tanks, and suggests the potential risks posed by the isolated bacteria to the health of ornamental fish species.
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Affiliation(s)
- Yi Ying Cheok
- 1Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, 50603, Malaysia
| | - Suat Moi Puah
- 1Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, 50603, Malaysia
| | - Kek Heng Chua
- 1Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, 50603, Malaysia
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Lau TTV, Tan JMA, Puthucheary SD, Puah SM, Chua KH. Genetic relatedness and novel sequence types of clinical Aeromonas dhakensis from Malaysia. Braz J Microbiol 2020; 51:909-18. [PMID: 32067209 DOI: 10.1007/s42770-020-00239-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 02/03/2020] [Indexed: 12/18/2022] Open
Abstract
Aeromonas dhakensis is an emergent human pathogen with medical importance. This study was aimed to determine the sequence types (STs), genetic diversity, and phylogenetic relationships of different clinical sources of 47 A. dhakensis from Malaysia using multilocus sequence typing (MLST), goeBURST, and phylogenetic analyses. The analysis of a concatenated six-gene tree with a nucleotide length of 2994 bp based on six housekeeping genes (gyrB, groL, gltA, metG, ppsA, and recA) and independent analyses of single gene fragments was performed. MLST was able to group 47 A. dhakensis from our collection into 36 STs in which 34 STs are novel STs. The most abundant ST521 consisted of five strains from peritoneal fluid and two strains from stools. Comparison of 62 global A. dhakensis was carried out via goeBURST; 94.4% (34/36) of the identified STs are novel and unique in Malaysia. Two STs (111 and 541) were grouped into clonal complexes among our strains and 32 STs occurred as singletons. Single-gene phylogenetic trees showed varying topologies; groL and rpoD grouped all A. dhakensis into a tight-cluster with bootstrap values of 100% and 99%, respectively. A poor phylogenetic resolution encountered in single-gene analyses was buffered by the multilocus phylogenetic tree that offered high discriminatory power (bootstrap value = 100%) in resolving all A. dhakensis from A. hydrophila and delineating the relationship among other taxa. Genetic diversity analysis showed groL as the most conserved gene and ppsA as the most variable gene. This study revealed novel STs and high genetic diversity among clinical A. dhakensis from Malaysia.
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Ueno M, Iida H, Kaibori M, Komeda K, Takemura S, Noda T, Ikoma H, Nomi T, Hayami S, Hirokawa F, Tanaka S, Matsui K, Ishizaki M, Morimura R, Hokuto D, Eguchi H, Tani M, Yamaue H, Kubo S. Mortality analysis of Aeromonas hydrophila infection in hepato-biliary pancreatic surgery: Multicenter retrospective observational study. J Hepatobiliary Pancreat Sci 2020; 27:747-755. [PMID: 32692905 DOI: 10.1002/jhbp.805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/25/2020] [Accepted: 07/08/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND/PURPOSE Aeromonas hydrophila can cause lethal infectious complications after surgery. There have been no large cohort studies of this specific to the hepato-biliary-pancreatic (HBP) field. We investigate the postoperative influence of A hydrophila infection after HBP surgery. METHODS We retrospectively reviewed patients who underwent HBP surgery between 2008 and 2017 at eight university hospitals. Patients with A hydrophila isolation during perioperative management were extracted, and their postoperative courses were investigated. RESULTS Bacterial culture examination of 10 074 patients was performed as perioperative management. Among them, 76 patients (0.75%) had A hydrophila isolation, most of whom underwent pancreatoduodenectomy (n = 38) or hepatectomy with biliary reconstruction (n = 14). There were seven mortalities after these two procedures (13.5%), five within 3 days after the onset of infection. Bile (n = 48) and abdominal drainage fluid (n = 29) were major sites of A hydrophila isolation. Typical prophylactic antibiotics, cefazolin or flomoxef, were mostly resistant. There was no mortality among patients that received sensitive antibiotics prophylactically. CONCLUSIONS Isolation of A hydrophila was low in our cases of HBP surgery, but the condition of some patients deteriorated rapidly by this infection. Although there could be several bacterial infections during management of HBP surgery, A hydrophila should not be overlooked. Preparation of appropriate prophylactic antibiotics may prevent or reduce mortality.
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Affiliation(s)
- Masaki Ueno
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hiroya Iida
- Department of Surgery, Shiga University of Medical Science, Otsu, Japan
| | - Masaki Kaibori
- Department of Surgery, Kansai Medical University Hirakata Hospital, Hirakata, Japan
| | - Koji Komeda
- Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan
| | - Shigekazu Takemura
- Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka City, Japan
| | - Takehiro Noda
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Hisashi Ikoma
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takeo Nomi
- Department of Surgery, Nara Medical University, Kashihara, Japan
| | - Shinya Hayami
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - Fumitoshi Hirokawa
- Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan
| | - Shogo Tanaka
- Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka City, Japan
| | - Kousuke Matsui
- Department of Surgery, Kansai Medical University Hirakata Hospital, Hirakata, Japan
| | - Morihiko Ishizaki
- Department of Surgery, Kansai Medical University Hirakata Hospital, Hirakata, Japan
| | - Ryo Morimura
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Daisuke Hokuto
- Department of Surgery, Nara Medical University, Kashihara, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Masaji Tani
- Department of Surgery, Shiga University of Medical Science, Otsu, Japan
| | - Hiroki Yamaue
- Second Department of Surgery, Wakayama Medical University, Wakayama, Japan
| | - Shoji Kubo
- Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka City, Japan
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