1
|
Koti K, Rodas-Gonzalez A, Nadon C, McAllister T, Yang X, Narváez-Bravo C. Evaluating disinfectant efficacy on mixed biofilms comprising Shiga toxigenic Escherichia coli, lactic acid bacteria, and spoilage microorganisms. Front Microbiol 2024; 15:1360645. [PMID: 38633705 PMCID: PMC11021663 DOI: 10.3389/fmicb.2024.1360645] [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: 12/23/2023] [Accepted: 03/07/2024] [Indexed: 04/19/2024] Open
Abstract
This study aimed to investigate the impact of temperature and the presence of other microorganisms on the susceptibility of STEC to biocides. Mature biofilms were formed at both 10°C and 25°C. An inoculum of planktonic bacteria comprising 106 CFU/mL of spoilage bacteria and 103 CFU/mL of a single E. coli strain (O157, O111, O103, and O12) was used to form mixed biofilms. The following bacterial combinations were tested: T1: Carnobacterium piscicola + Lactobacillus bulgaricus + STEC, T2: Comamonas koreensis + Raoultella terrigena + STEC, and T3: Pseudomonas aeruginosa + C. koreensis + STEC. Tested biocides included quaternary ammonium compounds (Quats), sodium hypochlorite (Shypo), sodium hydroxide (SHyd), hydrogen peroxide (HyP), and BioDestroy®-organic peroxyacetic acid (PAA). Biocides were applied to 6-day-old biofilms. Minimum Bactericidal Concentrations (MBC) and Biofilm Eradication Concentrations (BEC) were determined. Planktonic cells and single-species biofilms exhibited greater susceptibility to sanitizers (p < 0.0001). Lactobacillus and Carnobacterium were more susceptible than the rest of the tested bacteria (p < 0.0001). Single species biofilms formed by E. coli O111, O121, O157, and O45 showed resistance (100%) to Shypo sanitizer (200 ppm) at 25°C. From the most effective to the least effective, sanitizer performance on single-species biofilms was PAA > Quats > HyP > SHyd > Shypo. In multi-species biofilms, spoilage bacteria within T1, T2, and T3 biofilms showed elevated resistance to SHyd (30%), followed by quats (23.25%), HyP (15.41%), SHypo (9.70%), and BioDestroy® (3.42%; p < 0.0001). Within T1, T2, and T3, the combined STEC strains exhibited superior survival to Quats (23.91%), followed by HyP (19.57%), SHypo (18.12%), SHyd (16.67%), and BioDestroy® (4.35%; p < 0.0001). O157:H7-R508 strains were less tolerant to Quats and Shypo when combined with T2 and T3 (p < 0.0001). O157:H7 and O103:H2 strains in mixed biofilms T1, T2, and T3 exhibited higher biocide resistance than the weak biofilm former, O145:H2 (p < 0.0001). The study shows that STEC within multi-species biofilms' are more tolerant to disinfectants.
Collapse
Affiliation(s)
- Kavitha Koti
- Department of Food and Human Nutritional Science, University of Manitoba, Winnipeg, MB, Canada
| | | | - Celine Nadon
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Tim McAllister
- Department of Food and Human Nutritional Science, University of Manitoba, Winnipeg, MB, Canada
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada
| | - Xianqin Yang
- Agriculture and Agri-Food Canada, Lacombe Research and Development Centre, Lacombe, AB, Canada
| | - Claudia Narváez-Bravo
- Department of Food and Human Nutritional Science, University of Manitoba, Winnipeg, MB, Canada
| |
Collapse
|
2
|
Prithvisagar KS, Gollapalli P, D’Souza C, Rai P, Karunasagar I, Karunasagar I, Ballamoole KK. Genome analysis of clinical genotype Vibrio vulnificus isolated from seafood in Mangaluru Coast, India provides insights into its pathogenicity. Vet Q 2023; 43:1-17. [PMID: 37478018 PMCID: PMC10438861 DOI: 10.1080/01652176.2023.2240389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 07/23/2023] Open
Abstract
Vibrio vulnificus an opportunistic human pathogen native to marine/estuarine environment, is one of the leading causes of death due to seafood consumption and exposure of wounds to seawater worldwide. The present study involves the whole genome sequence analysis of an environmental strain of V. vulnificus (clinical genotype) isolated from seafood along the Mangaluru coast of India. The sequenced genome data was subjected to in-silico analysis of phylogeny, virulence genes, antimicrobial resistance determinants, and secretary proteins using suitable bioinformatics tools. The sequenced isolate had an overall genome length of 4.8 Mb and GC content of 46% with 4400 coding DNA sequences. The sequenced strain belongs to a new sequence type (Multilocus sequence typing) and was also found to branch with a phylogenetic lineage that groups the most infectious strains of V. vulnificus. The seafood isolate had complete genes involved in conferring serum resistance yet showed limited serum resistance. The study identified several genes against the antibiotics that are commonly used in their treatment, highlighting the need for alternative treatments. Also, the secretory protein analysis revealed genes associated with major pathways like ABC transporters, two-component systems, quorum sensing, biofilm formation, cationic antimicrobial peptide (CAMP) resistance, and others that play a critical role in the pathogenesis of the V. vulnificus. To the best of our knowledge, this is the first report of a detailed analysis of the genomic information of a V. vulnificus isolated from the Indian subcontinent and provides evidence that raises public health concerns about the safety of seafood.
Collapse
Affiliation(s)
- Kattapuni Suresh Prithvisagar
- Department of Infectious Diseases and Microbial Genomics, Nitte University Centre for Science Education and Research, Nitte (Deemed to be University), Mangaluru, India
| | - Pavan Gollapalli
- Center for Bioinformatics and Biostatistics, Nitte (Deemed to be University), Mangaluru, India
| | - Caroline D’Souza
- Department of Infectious Diseases and Microbial Genomics, Nitte University Centre for Science Education and Research, Nitte (Deemed to be University), Mangaluru, India
| | - Praveen Rai
- Department of Infectious Diseases and Microbial Genomics, Nitte University Centre for Science Education and Research, Nitte (Deemed to be University), Mangaluru, India
| | - Iddya Karunasagar
- Department of Infectious Diseases and Microbial Genomics, Nitte University Centre for Science Education and Research, Nitte (Deemed to be University), Mangaluru, India
| | - Indrani Karunasagar
- Department of Infectious Diseases and Microbial Genomics, Nitte University Centre for Science Education and Research, Nitte (Deemed to be University), Mangaluru, India
| | - Krishna Kumar Ballamoole
- Department of Infectious Diseases and Microbial Genomics, Nitte University Centre for Science Education and Research, Nitte (Deemed to be University), Mangaluru, India
| |
Collapse
|
3
|
Comparison of Phenotype and Genotype Virulence and Antimicrobial Factors of Salmonella Typhimurium Isolated from Human Milk. Int J Mol Sci 2023; 24:ijms24065135. [PMID: 36982209 PMCID: PMC10048834 DOI: 10.3390/ijms24065135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/03/2023] [Accepted: 03/04/2023] [Indexed: 03/11/2023] Open
Abstract
Salmonella is a common foodborne infection. Many serovars belonging to Salmonella enterica subsp. enterica are present in the gut of various animal species. They can cause infection in human infants via breast milk or cross-contamination with powdered milk. In the present study, Salmonella BO was isolated from human milk in accordance with ISO 6579-1:2017 standards and sequenced using whole-genome sequencing (WGS), followed by serosequencing and genotyping. The results also allowed its pathogenicity to be predicted. The WGS results were compared with the bacterial phenotype. The isolated strain was found to be Salmonella enterica subsp. enterica serovar Typhimurium 4:i:1,2_69M (S. Typhimurium 69M); it showed a very close similarity to S. enterica subsp. enterica serovar Typhimurium LT2. Bioinformatics sequence analysis detected eleven SPIs (SPI-1, SPI-2, SPI-3, SPI-4, SPI-5, SPI-9, SPI-12, SPI-13, SPI-14, C63PI, CS54_island). Significant changes in gene sequences were noted, causing frameshift mutations in yeiG, rfbP, fumA, yeaL, ybeU (insertion) and lpfD, avrA, ratB, yacH (deletion). The sequences of several proteins were significantly different from those coded in the reference genome; their three-dimensional structure was predicted and compared with reference proteins. Our findings indicate the presence of a number of antimicrobial resistance genes that do not directly imply an antibiotic resistance phenotype.
Collapse
|
4
|
Li S, Liang Y, Hu X. Risk factors for multidrug resistance in tuberculosis patients with diabetes mellitus. BMC Infect Dis 2022; 22:835. [PMID: 36369020 PMCID: PMC9650799 DOI: 10.1186/s12879-022-07831-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 11/02/2022] [Indexed: 11/13/2022] Open
Abstract
Objective To study the risk factors and prediction models of multidrug resistance in patients with tuberculosis and diabetes and those with a history of tuberculosis treatment. Methods A total of 256 tuberculosis patients with diabetes who were registered in Luoyang city, Henan Province, from January 2018 to December 2021. Logistic regression analysis was performed to analyse the risk factors for multidrug resistance. ROC curves were used to analyse the predictive model for multidrug resistance. Results Age < 65 years old, HbA1c, and a history of tuberculosis treatment were independent risk factors for multidrug resistance in patients with tuberculosis and diabetes (P < 0.05). The area under the ROC curve of predictive model for MDR was 0.878 (95% CI (0.824, 0.932)). Age < 65 years old and HbA1c were independent risk factors for MDR in patients with TB and diabetes with a history of TB treatment. The area under the ROC curve of predictive model for MDR was 0.920 [95% CI (0.831, 0.999)]. Conclusion The predictive model had certain prediction value for the risk of multidrug resistance in patients with tuberculosis and diabetes.
Collapse
|
5
|
Screening of Microbial Fermentation Products for Anti-M. tuberculosis Activity. Animals (Basel) 2022; 12:ani12151947. [PMID: 35953936 PMCID: PMC9367595 DOI: 10.3390/ani12151947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 11/19/2022] Open
Abstract
Simple Summary M. tuberculosis (M.tb) is the main pathogen of tuberculosis (TB). The emergence of multidrug-resistant (MDR) and extensively drug-resistant (XDR) M.tb has brought new challenges to the treatment of TB. Therefore, finding new materials for the development of natural anti-TB drugs is crucial to the prevention and treatment of TB. In order to discover new anti-TB drug materials, we isolated microorganisms from the soil and tested the anti-M.tb activity of their fermentation products. The results showed that the four fermentation products had anti-M.tb activities in vitro and in intracellular bacteria. The qPCR results showed that the four fermentation products down-regulated some growth-essential gene expression of M.tb. Thus, we speculated that the fermentation product may exert its anti-M.tb effect by down-regulating the expression of the essential genes of M.tb. Abstract Tuberculosis (TB), caused by M. tuberculosis (M.tb), is the leading infectious cause of mortality worldwide. The emergence of drug-resistant M.tb has made the control of TB more difficult. In our study, we investigated the ability of microorganism fermentation products from the soil to inhibit M.tb. We successfully identified four fermentation products (Micromonospora chokoriensis, Micromonospora purpureochromogenes, Micromonospora profundi, Streptomyces flavofungini) that inhibited the growth of M.tb in vitro and in intracellular bacteria at 25 μg/mL MIC. Importantly, the fermentation products decreased some essential gene expression levels for M.tb growth. Our data provide the possibility that microbial fermentation products have potential development value for anti-M.tb drugs.
Collapse
|
6
|
Kirthika P, Jawalagatti V, Senevirathne A, Lee JH. Coordinated interaction between Lon protease and catalase-peroxidase regulates virulence and oxidative stress management during Salmonellosis. Gut Microbes 2022; 14:2064705. [PMID: 35438052 PMCID: PMC9037549 DOI: 10.1080/19490976.2022.2064705] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
This study investigates the interplay between Lon protease and catalase-peroxidase (KatG) in relation to virulence modulation and the response to oxidative stress in Salmonella Typhimurium (ST). Proteomic comparison of ST wild-type and lon deletion mutant led to the recognition of a highly expressed KatG protein product among five other protein candidates that were significantly affected by lon deletion. By employing a bacterium two-hybrid assay (B2H), we demonstrated that the catalytic domain of Lon protease potentially interacts with the KatG protein that leads to proteolytic cleavage. Assessment of virulence gene expression in single and double lon and katG mutants revealed katG to be a potential positive modulator of both Salmonella pathogenicity Island-1 (SPI-1) and -2, while lon significantly affected SPI-1 genes. ST double deletion mutant, ∆lon∆katG was more susceptible to survival defects within macrophage-like cells and exhibited meager colonization of the mouse spleen compared to the single deletion mutants. The findings reveal a previously unknown function of Lon and KatG interaction in Salmonella virulence. Taken together, our experiments demonstrate the importance of Lon and KatG to cope with oxidative stress, for intracellular survival and in vivo virulence of Salmonella.
Collapse
Affiliation(s)
- Perumalraja Kirthika
- Department of Public Health, College of Veterinary Medicine, Jeonbuk National University, Republic of Korea,Biochemistry & Molecular Biology Department, Mayo Clinic, Rochester, Minnesota, USA 55905
| | - Vijayakumar Jawalagatti
- Department of Public Health, College of Veterinary Medicine, Jeonbuk National University, Republic of Korea,Urology Department, Mayo Clinic, Rochester, Minnesota, USA 55905
| | - Amal Senevirathne
- Department of Public Health, College of Veterinary Medicine, Jeonbuk National University, Republic of Korea
| | - John Hwa Lee
- Department of Public Health, College of Veterinary Medicine, Jeonbuk National University, Republic of Korea,CONTACT John Hwa Lee College of Veterinary Medicine, Jeonbuk National University,Iksan campus, 54595, South Korea
| |
Collapse
|
7
|
Ling N, Ou D, Shen Y, Zhang D, Wang Y, Tong L, Ding Y, Wang J, Yang X, Zhang J, Wu Q, Ye Y. Proteomics analysis mediated by quorum sensing luxS involved in oxidative stress in Cronobacter malonaticus. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
8
|
Singh M, De Silva PM, Al-Saadi Y, Switala J, Loewen PC, Hausner G, Chen W, Hernandez I, Castillo-Ramirez S, Kumar A. Characterization of Extremely Drug-Resistant and Hypervirulent Acinetobacter baumannii AB030. Antibiotics (Basel) 2020; 9:antibiotics9060328. [PMID: 32560407 PMCID: PMC7345994 DOI: 10.3390/antibiotics9060328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 12/21/2022] Open
Abstract
Acinetobacter baumannii is an important nosocomial bacterial pathogen. Multidrug-resistant isolates of A. baumannii are reported worldwide. Some A. baumannii isolates display resistance to nearly all antibiotics, making treatment of infections very challenging. As the need for new and effective antibiotics against A. baumannii becomes increasingly urgent, there is a need to understand the mechanisms of antibiotic resistance and virulence in this organism. In this work, comparative genomics was used to understand the mechanisms of antibiotic resistance and virulence in AB030, an extremely drug-resistant and hypervirulent strain of A. baumannii that is a representative of a recently emerged lineage of A. baumannii International Clone V. In order to characterize AB030, we carried out a genomic and phenotypic comparison with LAC-4, a previously described hyper-resistant and hypervirulent isolate. AB030 contains a number of antibiotic resistance- and virulence-associated genes that are not present in LAC-4. A number of these genes are present on mobile elements. This work shows the importance of characterizing the members of new lineages of A. baumannii in order to determine the development of antibiotic resistance and virulence in this organism.
Collapse
Affiliation(s)
- Manu Singh
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
| | - P. Malaka De Silva
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
| | - Yasser Al-Saadi
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
| | - Jacek Switala
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
| | - Peter C. Loewen
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
| | - Georg Hausner
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
| | - Wangxue Chen
- Human Health Therapeutics, National Research Council Canada, 100 Sussex Drive, Ottawa, ON K1A 0R6, Canada;
| | - Ismael Hernandez
- Programa de Genómica Evolutiva, Centro de Ciencias Génomicas, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (I.H.); (S.C.-R.)
| | - Santiago Castillo-Ramirez
- Programa de Genómica Evolutiva, Centro de Ciencias Génomicas, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (I.H.); (S.C.-R.)
| | - Ayush Kumar
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (M.S.); (P.M.D.S.); (Y.A.-S.); (J.S.); (P.C.L.); (G.H.)
- Correspondence:
| |
Collapse
|
9
|
Lyu M, Wang D, Zhao J, Yang Z, Chong W, Zhao Z, Ming L, Ying B. A novel risk factor for predicting anti-tuberculosis drug resistance in patients with tuberculosis complicated with type 2 diabetes mellitus. Int J Infect Dis 2020; 97:69-77. [PMID: 32474202 DOI: 10.1016/j.ijid.2020.05.080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 05/15/2020] [Accepted: 05/22/2020] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES This study aimed to explore the relationship between glycosylated hemoglobin (HbA1c) and the risk of anti-tuberculosis (TB) drug resistance for TB-type 2 diabetes mellitus (T2DM) patients. METHODS From March 2014 to June 2019, medical records from multiple centers were searched. Logistic regression analyses were performed. A predictive model for multidrug-resistance (MDR) was developed and validated. Calibration and discrimination of the model were assessed. RESULTS Inconsistent results were found in the systemic review. A multicenter chart review with 657 records was thus conducted. The HbA1c <7% group and HbA1c ≥7% group had 390 and 267 patients, respectively. The HbA1c<7% group had a lower risk of developing rifampicin resistance, isoniazid resistance and MDR, with odd ratios (ORs) of 1.904 (p=0.001), 2.896 (p<0.001) and 3.228 (p<0.001), respectively. The between-group differences in the risk of anti-TB drug resistance were analyzed based on data from three provinces in China. After adding HbA1c grading, the predictive model for MDR (https://mengyuan.shinyapps.io/Shinyapp/) showed excellent capacity with an AUC of 75.4% in the training set (Sichuan and Gansu) and 73.9% in the internal validation set (Henan). The performances in calibration, prediction probabilities and net clinical benefit were significantly improved by HbA1c grading. CONCLUSIONS HbA1c grading was an independent risk factor for isoniazid resistance and MDR in TB-T2DM patients.
Collapse
Affiliation(s)
- Mengyuan Lyu
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, China; West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Dongmei Wang
- Department of Clinical Laboratory, Public Health Clinical Center of Chengdu, Sichuan, China
| | - Junwei Zhao
- Clinical Laboratory, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zengwei Yang
- Clinical Laboratory, the Pulmonary Hospital of Lanzhou, Lanzhou, Gansu, China
| | - Weelic Chong
- Sidney Kimmel School of Medicine, Thomas Jefferson University, Philadelphia, USA
| | - Zhenzhen Zhao
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, China; West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Liang Ming
- Clinical Laboratory, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
| | - Binwu Ying
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, China; West China School of Medicine, Sichuan University, Chengdu, Sichuan, China.
| |
Collapse
|