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Sharma N, Neill T, Yang HC, Oliver CL, Mahaffee WF, Naegele R, Moyer MM, Miles TD. Development of a PNA-LNA-LAMP Assay to Detect an SNP Associated with QoI Resistance in Erysiphe necator. PLANT DISEASE 2023; 107:3238-3247. [PMID: 37005502 DOI: 10.1094/pdis-09-22-2027-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
The repetitive use of quinone outside inhibitor fungicides (QoIs, strobilurins; Fungicide Resistance Action Committee [FRAC] 11) to manage grape powdery mildew has led to development of resistance in Erysiphe necator. While several point mutations in the mitochondrial cytochrome b gene are associated with resistance to QoI fungicides, the substitution of glycine to alanine at codon 143 (G143A) has been the only mutation observed in QoI-resistant field populations. Allele-specific detection methods such as digital droplet PCR and TaqMan probe-based assays can be used to detect the G143A mutation. In this study, a peptide nucleic acid-locked nucleic acid mediated loop-mediated isothermal amplification (PNA-LNA-LAMP) assay consisting of an A-143 reaction and a G-143 reaction, was designed for rapidly detecting QoI resistance in E. necator. The A-143 reaction amplifies the mutant A-143 allele faster than the wild-type G-143 allele, while the G-143 reaction amplifies the G-143 allele faster than the A-143 allele. Identification of resistant or sensitive E. necator samples was determined by which reaction had the shorter time to amplification. Sixteen single-spore QoI-resistant and -sensitive E. necator isolates were tested using both assays. Assay specificity in distinguishing the single nucleotide polymorphism (SNP) approached 100% when tested using purified DNA of QoI-sensitive and -resistant E. necator isolates. This diagnostic tool was sensitive to one-conidium equivalent of extracted DNA with an R2 value of 0.82 and 0.87 for the G-143 and A-143 reactions, respectively. This diagnostic approach was also evaluated against a TaqMan probe-based assay using 92 E. necator samples collected from vineyards. The PNA-LNA-LAMP assay detected QoI resistance in ≤30 min and showed 100% agreement with the TaqMan probe-based assay (≤1.5 h) for the QoI-sensitive and -resistant isolates. There was 73.3% agreement with the TaqMan probe-based assay when samples had mixed populations with both G-143 and A-143 alleles present. Validation of the PNA-LNA-LAMP assay was conducted in three different laboratories with different equipment. The results showed 94.4% accuracy in one laboratory and 100% accuracy in two other laboratories. The PNA-LNA-LAMP diagnostic tool was faster and required less expensive equipment relative to the previously developed TaqMan probe-based assay, making it accessible to a broader range of diagnostic laboratories for detection of QoI resistance in E. necator. This research demonstrates the utility of the PNA-LANA-LAMP for discriminating SNPs from field samples and its utility for point-of-care monitoring of plant pathogen genotypes.
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Affiliation(s)
- Nancy Sharma
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI
| | - Tara Neill
- USDA-ARS Horticultural Crops Disease and Pest Management Research Unit, Corvallis, OR
| | - Hui-Ching Yang
- USDA-ARS Crop Diseases, Pests and Genetics Unit, San Joaquin Valley Agricultural Sciences Center, Parlier, CA
| | - Charlotte L Oliver
- Department of Horticulture, Irrigated Agriculture Research and Extension Center, Washington State University, Prosser, WA
| | - Walter F Mahaffee
- USDA-ARS Horticultural Crops Disease and Pest Management Research Unit, Corvallis, OR
| | - Rachel Naegele
- USDA-ARS Crop Diseases, Pests and Genetics Unit, San Joaquin Valley Agricultural Sciences Center, Parlier, CA
| | - Michelle M Moyer
- Department of Horticulture, Irrigated Agriculture Research and Extension Center, Washington State University, Prosser, WA
| | - Timothy D Miles
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI
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Hess J, Kreitlow A, Rohn K, Hennig-Pauka I, Abdulmawjood A. Rapid Diagnostic of Streptococcus suis in Necropsy Samples of Pigs by thrA-Based Loop-Mediated Isothermal Amplification Assay. Microorganisms 2023; 11:2447. [PMID: 37894105 PMCID: PMC10608932 DOI: 10.3390/microorganisms11102447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/29/2023] Open
Abstract
Streptococcus (S.) suis presents a serious threat to the pig industry as well as food safety and public health. Although several LAMP assays have been developed for the identification of S. suis, no universal assay is so far available for the field-suitable examination of clinical pig specimens. Based on the thrA housekeeping gene, a new loop-mediated isothermal amplification (LAMP) assay was developed and validated for the detection of S. suis in the brain and joints of pigs. For this LAMP assay, two different methods for the extraction of DNA from brain and joint swabs were compared. Using the LPTV boiling method, the detection limit of LAMP was 1.08 CFU/reaction, while the detection limit was 53.8 CFU/reaction using a commercial DNA extraction kit. The detection limits of thrA-LAMP in combination with the LPTV boiling method were 104-105 CFU/swab in the presence of brain tissue and 103-104 CFU/swab in the presence of joint tissue. The diagnostic quality criteria of LAMP were determined by the examination of 49 brain swabs and 34 joint swabs obtained during routine diagnostic necropsies. Applying the LPTV boiling method to brain swabs, the sensitivity, specificity, and positive and negative predictive values of thrA-LAMP were 88.0, 95.8, 95.7, and 88.5% using cultural investigation as a reference method, and 76.7, 100, 100, and 73.1% using real-time PCR as a reference method. Based on these results, the thrA-LAMP assay combined with the LPTV boiling method is suitable for rapid detection of S. suis from brain swabs.
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Affiliation(s)
- Julian Hess
- Field Station for Epidemiology (Bakum), University of Veterinary Medicine Hannover, Foundation, 49456 Bakum, Germany;
| | - Antonia Kreitlow
- Institute for Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany;
| | - Karl Rohn
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany;
| | - Isabel Hennig-Pauka
- Field Station for Epidemiology (Bakum), University of Veterinary Medicine Hannover, Foundation, 49456 Bakum, Germany;
| | - Amir Abdulmawjood
- Institute for Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany;
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Li L, Ren J, Zhang Q, Luo Y, Zhang Y, Qi J, Zhao X, Hu M, Liu Y. Development of Two Loop-Mediated Isothermal Amplification Assays for Rapid Detection of ermB and mefA Genes in Streptococcus suis. Foodborne Pathog Dis 2022; 19:817-822. [PMID: 36399616 DOI: 10.1089/fpd.2022.0034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Streptococcus suis is an important zoonotic pathogen that poses a serious threat to the pig industry and human health. The massive use of macrolides has led to the emergence of resistance in S. suis, and S. suis is suspected to be a reservoir of antimicrobial resistance genes. The mechanism to macrolide resistance in S. suis is mainly due to ermB and mefA. In this study, loop-mediated isothermal amplification (LAMP) methods were developed to detect ermB and mefA genes in S. suis through turbidimetry detection. The sensitivity and specificity of the LAMP reactions were determined. All results of LAMP and polymerase chain reaction (PCR) assay were compared to determine whether LAMP method was accurate and reliable. The results showed that all 100 nonstreptococcus clinical isolates tested negative, indicating the high specificity of LAMP assays. The detection limit of LAMP assay was 1 fg per reaction, and 102-104-fold lower than those of conventional PCR methods. Evaluation of the performance of the LAMP assay in S. suis clinical strains revealed a good consistency between LAMP and PCR assays. In conclusion, LAMP assays are specific, sensitive, and rapid methods to detect ermB and mefA in S. suis.
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Affiliation(s)
- LuLu Li
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - JinRui Ren
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China.,School of Life Sciences, Shandong Normal University, Jinan, China
| | - Qing Zhang
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - YanBo Luo
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - Yin Zhang
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - Jing Qi
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - XiaoNan Zhao
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - Ming Hu
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
| | - YuQing Liu
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Jinan, China
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A high sensitivity method of closed-tube loop-mediated isothermal amplification developed for visual and rapid detection of cow milk adulteration. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2021.105214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Standardization of loop-mediated isothermal amplification for detection of D. nodosus and F. necrophorum causing footrot in sheep and goats. Trop Anim Health Prod 2022; 54:57. [PMID: 35031870 DOI: 10.1007/s11250-022-03064-3] [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: 07/24/2021] [Accepted: 01/04/2022] [Indexed: 10/19/2022]
Abstract
The loop-mediated isothermal amplification (LAMP) was standardized for rapid detection of Dichelobacter nodosus and Fusobacterium necrophorum. A total of 250 foot swabs were screened from sheep (200) and goats (50) from different districts of Rayalaseema, viz., Chittoor, Nellore, Kadapa, and Anantapur. Out of 250 samples 75 (30.0%) and 85 (34.0%) were positive for D. nodosus and F. necrophorum, respectively. All the 250 samples were screened individually for both the organisms by LAMP. Among them, 104 (41.6%) were found to be positive for D. nodosus and 120 (48.0%) were positive for F. necrophorum. The efficacy of LAMP in terms of sample DNA detection limit was compared with the PCR by using standard dilutions of DNA extracted from D. nodosus and F. necrophorum cultures. The detection limit was found to be higher than PCR for both the organisms. The sensitivity of LAMP is compared with PCR by targeting 16S rRNA gene of D. nodosus and lktA gene of F. necrophorum. In case of D. nodosus, out of 250 samples, 75 (30.0%) were positive by PCR and 104 (41.6%) were positive by LAMP. Among 250 samples, 85 (34.0%) were positive by PCR and 120 (48.0%) were positive by LAMP in case of F. necrophorum. The LAMP was found to be more sensitive than PCR in detecting the organisms with high statistical significance.
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Jiang X, Zhu L, Zhan D. Development of a recombinase polymerase amplification assay for rapid detection of Streptococcus suis type 2 in nasopharyngeal swab samples. Diagn Microbiol Infect Dis 2021; 102:115594. [PMID: 34871933 DOI: 10.1016/j.diagmicrobio.2021.115594] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/27/2021] [Accepted: 10/29/2021] [Indexed: 12/28/2022]
Abstract
Streptococcus suis serotype 2 (SS2), an emerging zoonotic pathogen, may induce severe infections and symptoms manifested as septicemia, meningitis and even death both in human and pigs. The aim of this article was to develop a new methodology as real-time recombinase polymerase amplification (RT-RPA) assay targeting cps2J gene for the detection of SS2 (or SS1/2). The sensitivity and reproducibility of RT-RPA results were evaluated and compared with a real-time quantitative PCR (RT-qPCR). The established RT-RPA reaction could be completed in 20 minutes with distinguishable specificity against the predominant S. suis infection serotypes of 3, 4, 5, 7, 9, 14, and 31. Lower detection limit for RT-RPA was 102 genomic DNA copies per reaction. The specimen performance of RT-RPA was tested in nasopharyngeal swab samples with the sensitivity and specificity as 97.5% and 100%, respectively. Thus, this RT-RPA method is a rapid and potential molecular diagnostic tool for SS2 detection.
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Affiliation(s)
- Xiaowu Jiang
- Medical School of Yichun University, Yichun, Jiangxi, China; Jiangxi Provincial Key Laboratory of Active Component of Natural Drugs, Poster-Doctoral Research Center, Jiangxi, China.
| | - Lexin Zhu
- Medical School of Yichun University, Yichun, Jiangxi, China
| | - Dongbo Zhan
- Medical School of Yichun University, Yichun, Jiangxi, China
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Li L, Zhang Q, Zhao X, Zhou Y, Sun J, Ren J, Zhou D, Luo YB, Hu M, Zhang Y, Qi J, Liu YQ. Rapid Detection of mrp, epf, and sly Genes by Loop-Mediated Isothermal Amplification in Streptococcus suis. Foodborne Pathog Dis 2021; 18:290-296. [PMID: 33512258 DOI: 10.1089/fpd.2020.2868] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Streptococcus suis remains a serious threat to the worldwide swine industry and human health. In this study, rapid assays for the detection of three common virulence-related factors (mrp, epf, and sly) were developed, evaluated, and applied. Loop-mediated isothermal amplification (LAMP) primers were designed using Primer Explorer V5 software. The sensitivity and specificity of the LAMP assays were determined based on sample turbidity. For all three genes, LAMP assays were performed at 62°C with a reaction time of 60 min. The detection limit of conventional polymerase chain reaction (PCR) was 1 ng/μL, 10 pg/μL, and 100 fg/μL for the epf, sly, and mrp genes, respectively. For the LAMP assays, the detection limits were 10 pg/μL, 10 fg/μL, and 100 fg/μL for epf, sly, and mrp, respectively, representing sensitivities 100-1000 times higher than those of the PCR assay. Furthermore, when the LAMP assays were applied to clinical strains, the results were consistent with those of the PCR assay, confirming the LAMP assays as rapid and reliable detection techniques. In conclusion, the LAMP assays described in this study have the potential to become standard methods to detect the virulence factors mrp, epf, and sly. To the best of our knowledge, this is the first study to report the application of LAMP to detect the mrp, epf, and sly genes.
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Affiliation(s)
- LuLu Li
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Qing Zhang
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Xiaonan Zhao
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Yufeng Zhou
- National Veterinary Microbiological Drug Resistance Risk Assessment Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Jian Sun
- National Veterinary Microbiological Drug Resistance Risk Assessment Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Jinrui Ren
- School of Life Sciences, Shandong Normal University, Jinan, China
| | - Dong Zhou
- Shandong Minhe Animal Husbandry Co., Ltd., Penglai, China
| | - Yan-Bo Luo
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Ming Hu
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Yin Zhang
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Jing Qi
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Yu-Qing Liu
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
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Wang J, Dong R, Zou P, Chen Y, Li N, Wang Y, Zhang T, Pan X. Identification of a Novel Linear B Cell Epitope on the Sao Protein of Streptococcus suis Serotype 2. Front Immunol 2020; 11:1492. [PMID: 32765516 PMCID: PMC7381117 DOI: 10.3389/fimmu.2020.01492] [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: 03/20/2020] [Accepted: 06/08/2020] [Indexed: 12/02/2022] Open
Abstract
Surface antigen one (Sao) protein is a bacterial surface protein identified in the important zoonotic pathogen Streptococcus suis serotype 2 (S. suis 2) during an extensive search for functional proteins. The Sao protein is anchored to the bacterial cell wall by the LPVTG motif and is widely distributed in many S. suis serotypes. In this paper, we present the immunodominant epitope peptide of the Sao protein that is recognized by BALB/c antibodies against the Sao protein: 355SEKQMPSVVNENAVTPEKQMTNKENDNIET384 (location Sao355−384). To determine the core epitope recognized by antibodies, we prepared truncation peptide libraries. Analyses of the immunoreactivity of truncation peptides with anti-Sao355−384 serum revealed that the most immunoreactive sequence was 355SEKQMPSVVNENAVTPEK372 (location Sao355−372). Moreover, we observed that this core epitope also showed good specificity based on the ratio of reactivity with serum from S. suis–positive patients compared to serum from S. suis–negative patients. Our results point to the potential of using the Sao355−372 peptide in diagnostic assays to determine S. suis infection in humans.
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Affiliation(s)
- Jing Wang
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Ruirui Dong
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Ping Zou
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Yuejuan Chen
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Na Li
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Yao Wang
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Ting Zhang
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Xiuzhen Pan
- Department of Microbiology, Hua Dong Research Institute for Medicine and Biotechnics, Nanjing, China
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Quyen TL, Nordentoft S, Vinayaka AC, Ngo TA, Engelsmenn P, Sun Y, Madsen M, Bang DD, Wolff A. A Sensitive, Specific and Simple Loop Mediated Isothermal Amplification Method for Rapid Detection of Campylobacter spp. in Broiler Production. Front Microbiol 2019; 10:2443. [PMID: 31708907 PMCID: PMC6821646 DOI: 10.3389/fmicb.2019.02443] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/10/2019] [Indexed: 01/01/2023] Open
Abstract
Campylobacteriosis is one of the most common foodborne diseases worldwide. Two Campylobacter species - C. jejuni and C. coli in poultry and poultry products are considered to be the main source of human campylobacteriosis. Therefore, studying Campylobacter status in poultry flocks is needed to prevent transmission of disease and reduce human risk, health cost, and economic losses. In this study, we adapted and used a Loop-Mediated Isothermal Amplification (LAMP) assay for specific, sensitive, simple and cost-effective rapid detection of C. jejuni and C. coli in the poultry production chain. Amplified LAMP products were detected using a small, low-cost portable commercial blue LED transilluminator and a direct visual detection strategy was demonstrated. By using optimized conditions for amplification a limit of detection (LOD) of 50 CFU/ml was achieved for testing of C. jejuni and C. coli in spiked chicken feces without enrichment. The method took 60-70 min from receiving the samples to the final results (including 30 min for amplification). The optimized LAMP showed a relative accuracy of 98.4%, a specificity of 97.9%, and a sensitivity of 100% in comparison to real-time PCR method. Cohen's kappa index also showed an excellent agreement (0.94) between the two methods. The results showed that the method is specific, sensitive and is suitable to develop for rapid detection of Campylobacter spp. at poultry production.
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Affiliation(s)
- Than Linh Quyen
- Department of Biotechnology and Biomedicine, Technical University of Denmark (DTU-Bioengineering), Lyngby, Denmark
| | - Steen Nordentoft
- National Food Institute, Technical University of Denmark (DTU-Food), Lyngby, Denmark
| | | | - Tien Anh Ngo
- National Food Institute, Technical University of Denmark (DTU-Food), Lyngby, Denmark
| | - Pia Engelsmenn
- National Food Institute, Technical University of Denmark (DTU-Food), Lyngby, Denmark
| | - Yi Sun
- Department of Health Technology, Technical University of Denmark (DTU-Health Tech), Lyngby, Denmark
| | - Mogens Madsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark (DTU-Bioengineering), Lyngby, Denmark
| | - Dang Duong Bang
- National Food Institute, Technical University of Denmark (DTU-Food), Lyngby, Denmark
| | - Anders Wolff
- Department of Biotechnology and Biomedicine, Technical University of Denmark (DTU-Bioengineering), Lyngby, Denmark
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Chen S, Schnabel G, Yuan H, Luo C. LAMP detection of the genetic element 'Mona' associated with DMI resistance in Monilinia fructicola. PEST MANAGEMENT SCIENCE 2019; 75:779-786. [PMID: 30125043 DOI: 10.1002/ps.5178] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 07/13/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The increasing use of demethylation inhibitor (DMI) fungicides for the control of peach brown rot has resulted in resistance in Monilinia fructicola. Resistance in the southeastern USA is caused by overexpression of the MfCYP51 gene due to the presence of a 65-bp inserted element 'Mona' located in the upstream regulatory region of MfCYP51. A rapid diagnostic assay would be useful to detect the presence and monitor further spread of this resistance mechanism. RESULTS A loop-mediated isothermal amplification (LAMP) method was developed for rapid detection of 'Mona'-based DMI resistance. The assay was optimized for specificity and sensitivity, and was shown to detect the presence of 10 fg of purified target DNA per reaction within 85 min. Only DNA isolated from DMI-resistant isolates containing 'Mona' resulted in a fluorescent signal after LAMP assay amplification. DNA from sensitive isolates from China and the USA and six other common fungal species of peach did not yield a signal. The method also positively identified 'Mona' from crude DNA extracts (using Lyse and Go reagents heated to 100 °C for 10 min) obtained from the mycelium and conidia of symptomatic fruit. CONCLUSION Considering its specificity, stability and repeatability, the LAMP assay could be a valuable tool for rapid on-site diagnosis of M. fructicola isolates resistant to DMI fungicides in the southeastern USA. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Shuning Chen
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Guido Schnabel
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
| | - Huizhu Yuan
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chaoxi Luo
- Key Lab of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Department of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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Boonyong N, Kaewmongkol S, Khunbutsri D, Satchasataporn K, Meekhanon N. Contamination of Streptococcus suis in pork and edible pig organs in central Thailand. Vet World 2019; 12:165-169. [PMID: 30936671 PMCID: PMC6431799 DOI: 10.14202/vetworld.2019.165-169] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 12/17/2018] [Indexed: 12/23/2022] Open
Abstract
Background and Aim Streptococcus suis is an important zoonotic pathogen that can cause serious diseases in both swine and humans worldwide, especially in Asian countries. Since the majority of human cases reported in Thailand were infected by the consumption of a raw pork dish, the microbial food safety hazard associated with raw meat has been a matter of concern. Therefore, this study aimed to investigate the contamination by S. suis in pork and edible pig organs sold in central Thailand. Materials and Methods In total, 88 raw pork and pig organ samples were purchased from markets, butcher shops, and supermarkets in central Thailand. The samples were examined using the loop-mediated isothermal amplification (LAMP) technique. LAMP reactions used for the detection of the DNA of S. suis (LAMPSS) and S. suis serotype 2 or 1/2 (LAMPSS2) were carried out according to previous studies. Results The percentage of LAMPSS-positive samples was as high as 85.23% (75/88) while the percentage of LAMPSS2-positive samples was 17.05% (15/88). The percentages of LAMPSS- and LAMPSS2-positive samples were relatively high in both pig organs (lung and heart) and meat (sliced pork and minced pork) compared with the previous report. Except one supermarket, LAMPSS-positive samples were found in all sources investigated in this study. The pork and pig organs obtained from the markets and the butcher shops additionally gave positive results for LAMPSS2. Conclusion Using LAMP techniques, high rate contamination of S. suis was found in raw pork and edible pig organs sold at different sources in central Thailand. The cross-contamination could have occurred through slaughtering, meat cutting, and meat handling processes. Therefore, consumers and people involved in the pig production industry should be aware of the potential hazards of S. suis infection; food safety education is crucial to prevent further infection.
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Affiliation(s)
- Nuchjaree Boonyong
- Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand
| | - Sarawan Kaewmongkol
- Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand
| | - Duangdaow Khunbutsri
- Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand
| | - Khomsan Satchasataporn
- Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand
| | - Nattakan Meekhanon
- Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand
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12
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Fan F, Yin WX, Li GQ, Lin Y, Luo CX. Development of a LAMP Method for Detecting SDHI Fungicide Resistance in Botrytis cinerea. PLANT DISEASE 2018; 102:1612-1618. [PMID: 30673416 DOI: 10.1094/pdis-12-17-1933-re] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Resistance to succinate dehydrogenase inhibitors (SDHI) in Botrytis cinerea is associated with point mutations in the target gene succinate dehydrogenase subunit B (SdhB). The substitution from histidine to arginine at codon 272 (H272R) is currently the predominant mutation in SDHI-resistant populations in B. cinerea worldwide. In order to monitor the development of resistance to SDHI, a rapid, simple, and efficient method with high specificity to the H272R point mutation was developed based on loop-mediated isothermal amplification (LAMP). To specifically detect the H272R mutation, a set of four primers was designed based on the sequence of SdhB, and the LAMP reaction was optimized. When SYBR Green I was added after reaction, only samples with the H272R mutation showed the color change (from brown to fluorescent yellow), indicating that this set of primers could successfully discriminate the H272R genotype from other genotypes. Specificity and accuracy tests showed that this LAMP assay had high specificity and accuracy. Moreover, the LAMP method was further simplified with fungal mycelia and conidia as the amplification template which could be prepared within 5 min. Due to the low cost, simplicity, high efficiency, and specificity, the developed LAMP assay may contribute to the monitoring of resistance development to SDHI in B. cinerea, especially in field and high-throughput experiments.
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Affiliation(s)
- F Fan
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology
| | - W X Yin
- College of Plant Science and Technology and the Key Lab of Crop Disease Monitoring & Safety Control in Hubei Province
| | - G Q Li
- College of Plant Science and Technology and the Key Lab of Crop Disease Monitoring & Safety Control in Hubei Province
| | - Y Lin
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - C X Luo
- Key Lab of Horticultural Plant Biology, Ministry of Education, and College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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13
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Methods for the detection and characterization of Streptococcus suis: from conventional bacterial culture methods to immunosensors. Antonie van Leeuwenhoek 2018; 111:2233-2247. [PMID: 29934695 DOI: 10.1007/s10482-018-1116-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 06/14/2018] [Indexed: 01/26/2023]
Abstract
One of the most important zoonotic pathogens worldwide, Streptococcus suis is a swine pathogen that is responsible for meningitis, toxic shock and even death in humans. S. suis infection develops rapidly with nonspecific clinical symptoms in the early stages and a high fatality rate. Recently, much attention has been paid to the high prevalence of S. suis as well as the increasing incidence and its epidemic characteristics. As laboratory-acquired infections of S. suis can occur and it is dangerous to public health security, timely and early diagnosis has become key to controlling S. suis prevalence. Here, the techniques that have been used for the detection, typing and characterization of S. suis are reviewed and the prospects for future detection methods for this bacterium are also discussed.
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14
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Shelby T, Sulthana S, McAfee J, Banerjee T, Santra S. Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7. J Vis Exp 2017. [PMID: 28994755 DOI: 10.3791/55821] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Enterohemorrhagic Escherichia coli O157:H7 has been linked to both waterborne and foodborne illnesses, and remains a threat despite the food- and water-screening methods used currently. While conventional bacterial detection methods, such as polymerase chain reaction (PCR) and enzyme-linked immunosorbent assays (ELISA) can specifically detect pathogenic contaminants, they require extensive sample preparation and lengthy waiting periods. In addition, these practices demand sophisticated laboratory instruments and settings, and must be executed by trained professionals. Herein, a protocol is proposed for a simpler diagnostic technique that features the unique combination of magnetic and fluorescent parameters in a nanoparticle-based platform. The proposed multiparametric magneto-fluorescent nanosensors (MFnS) can detect E. coli O157:H7 contamination with as little as 1 colony-forming unit present in solution within less than 1 h. Furthermore, the ability of MFnS to remain highly functional in complex media such as milk and lake water has been verified. Additional specificity assays were also used to demonstrate the ability of MFnS to only detect the specific target bacteria, even in the presence of similar bacterial species. The pairing of magnetic and fluorescent modalities allows for the detection and quantification of pathogen contamination in a wide range of concentrations, exhibiting its high performance in both early- and late-stage contamination detection. The effectiveness, affordability, and portability of the MFnS make them an ideal candidate for point-of-care screening for bacterial contaminants in a wide range of settings, from aquatic reservoirs to commercially packaged foods.
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Affiliation(s)
- Tyler Shelby
- Department of Chemistry and Kansas Polymer Research Center, Pittsburg State University
| | - Shoukath Sulthana
- Department of Chemistry and Kansas Polymer Research Center, Pittsburg State University
| | - James McAfee
- Department of Chemistry and Kansas Polymer Research Center, Pittsburg State University
| | - Tuhina Banerjee
- Department of Chemistry and Kansas Polymer Research Center, Pittsburg State University;
| | - Santimukul Santra
- Department of Chemistry and Kansas Polymer Research Center, Pittsburg State University;
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15
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Xia XJ, Wang L, Shen ZQ, Qin W, Hu J, Jiang SJ, Li SG. Development of an Indirect Dot-PPA-ELISA using glutamate dehydrogenase as a diagnostic antigen for the rapid and specific detection of Streptococcus suis and its application to clinical specimens. Antonie van Leeuwenhoek 2017; 110:585-592. [DOI: 10.1007/s10482-016-0825-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 12/21/2016] [Indexed: 11/29/2022]
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16
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Establishment and Evaluation of a Loop-Mediated Isothermal Amplification Assay for Detection of Raccoon Dog in Meat Mixtures. J FOOD QUALITY 2017. [DOI: 10.1155/2017/9319035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Raccoon dog (Nyctereutes procyonoides) is an economically important animal used for fur production, but consuming its meat is injurious to human health. Currently, no rapid and sensitive method for detecting raccoon dog meat in meat mixtures is available. In this study, we developed an easily applicable, rapid, and economically feasible method for identifying the presence of raccoon dog in meat mixtures based on loop-mediated isothermal amplification (LAMP). Four sets of LAMP primers were tested at different temperatures, and the primers that worked best at 62°C (set 2) were determined. In the LAMP assay, there was no cross-reactivity with the meat procured from other species of animals and the detection limit of DNA concentration was 0.1 pg·μL−1, slightly higher than TaqMan real-time PCR (0.01 pg·μL−1), but sensitivity of 0.1 pg·μL−1 complies with most requirements of routine analysis. Moreover, by the LAMP method, the meat mixtures containing more than 0.5% of the raccoon dog component were directly detected (without DNA extraction) in the supernatant isolated from the meat mixtures after performing repeated cycles of thawing and freezing of minced meat mixtures. Our results show that LAMP assay is a valuable, straightforward, and sensitive detection tool for identification of raccoon dog meat in mixtures.
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17
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Mu XQ, Liu BB, Hui E, Huang W, Yao LC, Duo LB, Sun WY, Li GQ, Wang FX, Liu SL. A rapid loop-mediated isothermal amplification (LAMP) method for detection of the macrolide-streptogramin type B resistance gene msrA in Staphylococcus aureus. J Glob Antimicrob Resist 2016; 7:53-58. [PMID: 27607914 DOI: 10.1016/j.jgar.2016.07.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/10/2016] [Accepted: 07/18/2016] [Indexed: 12/25/2022] Open
Abstract
Macrolide-streptogramin type B resistance (the MSB phenotype) is a multidrug resistance phenotype in Staphylococcus aureus conferred by the resistance gene msrA. However, bacteria having the MSB phenotype are susceptible to lincosamides and 16-membered ring macrolides, which makes profiling resistance genes necessary and urgent for timely and appropriate use of antimicrobials. In this study, the loop-mediated isothermal amplification (LAMP) assay was optimized for prompt detection of the msrA gene. msrA gene sequences were obtained from the National Center for Biotechnology Information (NCBI) database and primers were designed using the LAMP primer designing software PrimerExplorer v.4, which together recognize seven distinct regions of the msrA gene. The specific LAMP primer set designed in this study could amplify the msrA gene within 25min at an isothermal temperature of 62°C. More importantly, the msrA gene could be detected at a sensitivity as low as 100pg. Furthermore, this optimized LAMP assay provided swift detection of the msrA gene even directly from human specimens. In conclusion, this assay may have great clinical application potential for detection of the msrA gene.
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Affiliation(s)
- Xiao-Qin Mu
- Systemomics Center, College of Pharmacy, and Genomics Research Center (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, China
| | - Bin-Bin Liu
- Systemomics Center, College of Pharmacy, and Genomics Research Center (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, China
| | - Ephraim Hui
- Systemomics Center, College of Pharmacy, and Genomics Research Center (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, China; HMU-UCFM Centre for Infection and Genomics, Harbin Medical University, Harbin, China
| | - William Huang
- Systemomics Center, College of Pharmacy, and Genomics Research Center (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, China; HMU-UCFM Centre for Infection and Genomics, Harbin Medical University, Harbin, China
| | - Li-Chen Yao
- Systemomics Center, College of Pharmacy, and Genomics Research Center (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, China
| | - Li-Bo Duo
- Department of Medicine Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wen-Ying Sun
- Department of Medicine Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Gui-Qiu Li
- Department of Laboratory Diagnosis, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Fu-Xiang Wang
- Department of Infectious Diseases, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Shu-Lin Liu
- Systemomics Center, College of Pharmacy, and Genomics Research Center (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, China; HMU-UCFM Centre for Infection and Genomics, Harbin Medical University, Harbin, China; Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Canada.
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18
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Okura M, Osaki M, Nomoto R, Arai S, Osawa R, Sekizaki T, Takamatsu D. Current Taxonomical Situation of Streptococcus suis. Pathogens 2016; 5:pathogens5030045. [PMID: 27348006 PMCID: PMC5039425 DOI: 10.3390/pathogens5030045] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/09/2016] [Accepted: 06/20/2016] [Indexed: 12/31/2022] Open
Abstract
Streptococcus suis, a major porcine pathogen and an important zoonotic agent, is considered to be composed of phenotypically and genetically diverse strains. However, recent studies reported several “S. suis-like strains” that were identified as S. suis by commonly used methods for the identification of this bacterium, but were regarded as distinct species from S. suis according to the standards of several taxonomic analyses. Furthermore, it has been suggested that some S. suis-like strains can be assigned to several novel species. In this review, we discuss the current taxonomical situation of S. suis with a focus on (1) the classification history of the taxon of S. suis; (2) S. suis-like strains revealed by taxonomic analyses; (3) methods for detecting and identifying this species, including a novel method that can distinguish S. suis isolates from S. suis-like strains; and (4) current topics on the reclassification of S. suis-like strains.
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Affiliation(s)
- Masatoshi Okura
- Division of Bacterial and Parasitic Diseases, National Institute of Animal Health, National Agriculture and Food Research Organization, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan.
| | - Makoto Osaki
- Division of Bacterial and Parasitic Diseases, National Institute of Animal Health, National Agriculture and Food Research Organization, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan.
| | - Ryohei Nomoto
- Department of Infectious Diseases, Kobe Institute of Health, 4-6-5 Minatojima-Nakamachi, Chuo-ku, Kobe, Hyogo 650-0045, Japan.
| | - Sakura Arai
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - Ro Osawa
- Organization for Advanced Science and Technology, Kobe University, 1-1 Rokko-dai, Nada-ku, Kobe, Hyogo 657-8501, Japan.
| | - Tsutomu Sekizaki
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| | - Daisuke Takamatsu
- Division of Bacterial and Parasitic Diseases, National Institute of Animal Health, National Agriculture and Food Research Organization, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan.
- The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan.
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19
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Lin M, Liu W, Wang P, Tan J, Zhou Y, Wu P, Zhang T, Yuan J, Chen Y. Rapid detection of ermB gene in Clostridium difficile by loop-mediated isothermal amplification. J Med Microbiol 2015; 64:854-861. [PMID: 26272634 DOI: 10.1099/jmm.0.000109] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Macrolide-lincosamide-streptogramin B resistance in Clostridium difficile is mostly due to the ermB resistance determinant. Here, we describe a sensitive and rapid molecular method to detect ermB in C. difficile to contribute to the wider epidemiological study. Five sets of loop-mediated isothermal amplification (LAMP) primers were designed and optimized for rapid detection of ermB. The specificity and sensitivity of the primers for ermB were detected, and the ermB LAMP assay was compared to conventional PCR with 80 clinical isolates of C. difficile. Real-time monitoring of turbidity and chromogenic reaction were used to determine negative and positive results. A total of 26 pathogenic bacterial strains of different species were found to be negative for ermB, which indicated the high specificity of the primers. ermB was detected in 78.8 % (63/80) of the clinical isolates by both LAMP and conventional PCR. The detection limit of LAMP was 36.1 pg DNA μl- 1 and its sensitivity was 10-fold greater than that of conventional PCR. This study is the first report regarding the development and application of the LAMP assay for detection of the ermB gene in C. difficile strains. The developed LAMP method is sensitive, specific and provides a user-friendly visual approach for the rapid detection of ermB-bearing C. difficile.
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Affiliation(s)
- Minyi Lin
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China.,Infectious Disease Center, The Fifth Affiliated Hospital, Sun Yat-sen University, 52 Meihua East Road, Zhuhai 519000, PR China
| | - Wei Liu
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongda Street, Fengtai District, Beijing 100071, PR China
| | - Pu Wang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
| | - Jiasheng Tan
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
| | - Youlian Zhou
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
| | - Peiqun Wu
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
| | - Ting Zhang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
| | - Jing Yuan
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongda Street, Fengtai District, Beijing 100071, PR China
| | - Ye Chen
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangdong Provincial Key Laboratory of Gastroenterology, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
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20
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Thirapanmethee K, Pothisamutyothin K, Nathisuwan S, Chomnawang MT, Wiwat C. Loop-mediated isothermal amplification assay targeting the blaCTX-M9 gene for detection of extended spectrum β-lactamase-producing Escherichia coli and Klebsiella pneumoniae. Microbiol Immunol 2015; 58:655-65. [PMID: 25284314 DOI: 10.1111/1348-0421.12205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 09/18/2014] [Accepted: 09/30/2014] [Indexed: 11/26/2022]
Abstract
Extended-spectrum β-lactamases (ESBLs) produced by Enterobacteriaceae are one of the resistance mechanisms to most β-lactam antibiotics. ESBLs are currently a major problem in both hospitals and community settings worldwide. Rapid and reliable means of detecting ESBL-producing bacteria is necessary for identification, prevention and treatment. Loop-mediated isothermal amplification (LAMP) is a technique that rapidly amplifies DNA with high specificity and sensitivity under isothermal conditions. This study was aimed to develop a convenient, accurate and inexpensive method for detecting ESBL-producing bacteria by a LAMP technique. ESBLs-producing Escherichia coli and Klebsiella pneumoniae were isolated from a tertiary hospital in Bangkok, Thailand and reconfirmed by double-disk synergy test. A set of four specific oligonucleotide primers of LAMP for detection of bla(CTX-M9) gene was designed based on bla(CTX-M9) from E. coli (GenBank Accession No. AJ416345). The LAMP reaction was amplified under isothermal temperature at 63°C for 60 min. Ladder-like patterns of band sizes from 226 bp of the bla(CTX-M9) DNA target was observed. The LAMP product was further analyzed by restriction digestion with MboI and TaqI endonucleases. The fragments generated were approximately 168, 177 and 250 bp in size for MboI digestion and 165, 193, 229, 281 and 314 bp for TaqI digestion, which is in agreement with the predicted sizes. The sensitivity of the LAMP technique to bla(CTX-M9) was greater than that of the PCR method by at least 10,000-fold. These results showed that the LAMP primers specifically amplified only the bla(CTX-M9) gene. Moreover, the presence of LAMP amplicon was simply determined by adding SYBR Green I in the reaction. In conclusion, this technique for detection of ESBLs is convenient, reliable and easy to perform routinely in hospitals or laboratory units in developing countries.
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21
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Hu D, Hao L, Zhang J, Yao P, Zhang Q, Lv H, Gong X, Pan X, Cao M, Zhu J, Zhang Y, Feng Y, Wang C. Development of reverse transcription loop-mediated isothermal amplification assays to detect Hantaan virus and Seoul virus. J Virol Methods 2015; 221:68-73. [PMID: 25920565 DOI: 10.1016/j.jviromet.2015.04.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 04/15/2015] [Accepted: 04/18/2015] [Indexed: 10/23/2022]
Abstract
We developed two assays based on one-step reverse transcription loop-mediated isothermal amplification (RT-LAMP) to identify Hantaan virus (HTNV) and Seoul virus (SEOV), members of the Hantavirus genus that cause hemorrhagic fever with renal syndrome (HFRS). Our results showed that these assays can be conducted within 30min under isothermal conditions. The detection limit for HTNV was around 10 copies per reaction, similar to detection levels for quantitative reverse transcription polymerase chain reaction (qRT-PCR) assays. The detection limit for SEOV was 100 copies per reaction, a sensitivity that was 10-fold lower than that for qRT-PCR assays but 10-fold higher than that for RT-PCR assays. The method we developed was specific for both HTNV and SEOV without any cross-reaction with other pathogens. We conclude that RT-LAMP assays could be useful for the rapid and direct detection of HTNV and SEOV clinically, and for the epidemiological investigation of HFRS.
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Affiliation(s)
- Dan Hu
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Lina Hao
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Jinhai Zhang
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Pingping Yao
- Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Qi Zhang
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Heng Lv
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Xiufang Gong
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Xiuzhen Pan
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Min Cao
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Jin Zhu
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Yun Zhang
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China
| | - Youjun Feng
- Center for Infection & Immunity, School of Basic Medical Sciences, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Changjun Wang
- Research Institute for Medicine of Nanjing Command, Nanjing 210002, China.
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22
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Lang X, Wan Z, Pan Y, Bu Z, Wang X, Wang X, Ji X, Zhu L, Wan J, Sun Y, Wang X. Catabolite control protein A has an important role in the metabolic regulation of Streptococcus suis type 2 according to iTRAQ-based quantitative proteomic analysis. Mol Med Rep 2015; 12:5967-72. [PMID: 26299628 DOI: 10.3892/mmr.2015.4211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 06/22/2015] [Indexed: 11/05/2022] Open
Abstract
The catabolite control protein A (ccpA) regulates the carbon metabolism in Streptococcus suis type 2 and has pleiotropic regulatory functions in bacterial virulence and transcription. The present study systematically investigated ccpA activity in Streptococcus suis type 2 using isobaric tag for relative and absolute quantification (iTRAQ) liquid chromatography‑tandem mass spectrometry‑based proteomics. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses demonstrated that ccpA is an important protein for the regulation of metabolism, virulence and immune pathways in Streptococcus suis type 2. The present study therefore expanded the current understanding of the effects of ccpA on virulence, metabolic regulation and transcription in Streptococcus suis type 2 and other important pathogens.
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Affiliation(s)
- Xulong Lang
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Zhonghai Wan
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Ying Pan
- Department of Orthodontics, Changchun Stomatological Hospital, Changchun, Jilin 130042, P.R. China
| | - Zhaoyang Bu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Xiuran Wang
- School of Life Science, Jilin Agricultural University, Changchun, Jilin 130118, P.R. China
| | - Xiaoxu Wang
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Xue Ji
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Lingwei Zhu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Jiayu Wan
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Yang Sun
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Xinglong Wang
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
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23
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Arai S, Tohya M, Yamada R, Osawa R, Nomoto R, Kawamura Y, Sekizaki T. Development of loop-mediated isothermal amplification to detect Streptococcus suis and its application to retail pork meat in Japan. Int J Food Microbiol 2015; 208:35-42. [PMID: 26043307 DOI: 10.1016/j.ijfoodmicro.2015.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Revised: 05/13/2015] [Accepted: 05/15/2015] [Indexed: 10/23/2022]
Abstract
We here developed a novel loop-mediated isothermal amplification (LAMP) method to detect Streptococcus suis in raw pork meat. This method, designated LAMPSS, targeted the recombination/repair protein (recN) gene of S. suis and detected all serotypes of S. suis, except those taxonomically removed from authentic S. suis, i.e., serotypes 20, 22, 26, 32, 33, and 34. The specificity of LAMPSS was confirmed and its detection limit was 5.4cfu/reaction. Among the 966 raw pork meat samples examined, including sliced pork, minced pork, and the liver, tongue, heart, and small intestine, 255 samples tested positive with LAMPSS. The rate of contamination was higher in the organs than in pork. No significant difference was observed in the total bacterial count between LAMPSS-positive and -negative samples. The number of shops that provided LAMPSS-positive pork was slightly higher in those that sold swine organs and pork than in those that sold only pork, suggesting that cross contamination occurred from the organs to pork. Among the 255 which tested positive for LAMPSS, only 47 samples tested positive for the previously described LAMP specific for S. suis serotype 2. Two isolates of S. suis serotype 2, belonging to sequence type 28, which is potentially hazardous to humans, as well as those of some other serotypes were obtained from 19 out of 47 samples by combining LAMP with a replica plating method. These results suggest that LAMPSS will be a useful tool for the surveillance of raw pork meat in the retail market.
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Affiliation(s)
- Sakura Arai
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Mari Tohya
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ryoko Yamada
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ro Osawa
- Department of Bioresource Sciences, Graduate School of Agricultural Sciences, Kobe University, Rokko-dai 1-1, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Ryohei Nomoto
- Organization for Advanced Science and Technology, Kobe University, Rokko-dai 1-1, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Yoshiaki Kawamura
- Department of Microbiology, Aichi Gakuin University, School of Pharmacy, 1-100 Kusumoto-cho, Nagoya, Aichi 464-8650, Japan
| | - Tsutomu Sekizaki
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan.
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Development of a loop-mediated isothermal amplification assay for rapid detection of Trichosporon asahii in experimental and clinical samples. BIOMED RESEARCH INTERNATIONAL 2015; 2015:732573. [PMID: 25692144 PMCID: PMC4322298 DOI: 10.1155/2015/732573] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 01/02/2015] [Indexed: 12/15/2022]
Abstract
Invasive trichosporonosis is a deep mycosis found mainly in immunocompromised hosts, and the major pathogen is Trichosporon asahii. We detected the species-specific intergenic spacers (IGS) of rRNA gene of T. asahii using a loop-mediated isothermal amplification (LAMP) assay in 15 isolates with 3 different visualization methods, including SYBR green detection, gel electrophoresis, and turbidimetric methods. The LAMP assay displayed superior rapidity to other traditional methods in the detection time; that is, only 1 h was needed for detection and identification of the pathogen DNA. Furthermore, the detection limit of the LAMP assay was more sensitive than the PCR assay. We also successfully detect the presence of T. asahii in samples from experimentally infected mice and samples from patients with invasive trichosporonosis caused by T. asahii, suggesting that this method may become useful in clinical applications in the near future.
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Xia Y, Guo XG, Zhou S. Rapid detection of Streptococcus pneumoniae by real-time fluorescence loop-mediated isothermal amplification. J Thorac Dis 2014; 6:1193-9. [PMID: 25276360 DOI: 10.3978/j.issn.2072-1439.2014.07.29] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 06/24/2014] [Indexed: 11/14/2022]
Abstract
BACKGROUND AND AIM OF STUDY A significant human pathogenic bacterium, Streptococcus pneumoniae was recognized as a major cause of pneumonia, and is the subject of many humoral immunity studies. Diagnosis is generally made based on clinical suspicion along with a positive culture from a sample from virtually any place in the body. But the testing time is too long. This study is to establish a rapid diagnostic method to identification of Streptococcus pneumoniae. METHODS Our laboratory has recently developed a new platform called real-amp, which combines loop-mediated isothermal amplification (LAMP) with a portable tube scanner real-time isothermal instrument for the rapid detection of Streptococcus pneumonia. Two pairs of amplification primers required for this method were derived from a conserved DNA sequence unique to the Streptococcus pneumoniae. The amplification was carried out at 63 degree Celsius using SYBR Green for 60 minutes with the tube scanner set to collect fluorescence signals. Clinical samples of Streptococcus pneumoniae and other bacteria were used to determine the sensitivity and specificity of the primers by comparing with traditional culture method. RESULTS The new set of primers consistently detected in laboratory-maintained isolates of Streptococcus pneumoniae from our hospital. The new primers also proved to be more sensitive than the published species-specific primers specifically developed for the LAMP method in detecting Streptococcus pneumoniae. CONCLUSIONS This study demonstrates that the Streptococcus pneumoniae LAMP primers developed here have the ability to accurately detect Streptococcus pneumoniae infections by real-time fluorescence LAMP.
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Affiliation(s)
- Yong Xia
- 1 Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong 510000, China ; 2 Department of Internal Medicine, The Third Clinical College of Guangzhou Medical University, Guangdong 510000, China ; 3 Center for Severe maternal Treatment of Guangzhou City, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong 510000, China ; 4 Center for Clinical Laboratory Medicine of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an 710000, China
| | - Xu-Guang Guo
- 1 Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong 510000, China ; 2 Department of Internal Medicine, The Third Clinical College of Guangzhou Medical University, Guangdong 510000, China ; 3 Center for Severe maternal Treatment of Guangzhou City, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong 510000, China ; 4 Center for Clinical Laboratory Medicine of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an 710000, China
| | - Shan Zhou
- 1 Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong 510000, China ; 2 Department of Internal Medicine, The Third Clinical College of Guangzhou Medical University, Guangdong 510000, China ; 3 Center for Severe maternal Treatment of Guangzhou City, The Third Affiliated Hospital of Guangzhou Medical University, Guangdong 510000, China ; 4 Center for Clinical Laboratory Medicine of PLA, Xijing Hospital, Fourth Military Medical University, Xi'an 710000, China
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Karthik K, Rathore R, Thomas P, Arun TR, Viswas KN, Dhama K, Agarwal RK. New closed tube loop mediated isothermal amplification assay for prevention of product cross-contamination. MethodsX 2014; 1:137-43. [PMID: 26150945 PMCID: PMC4472950 DOI: 10.1016/j.mex.2014.08.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 08/18/2014] [Indexed: 11/26/2022] Open
Abstract
Loop mediated isothermal amplification (LAMP) assay, a promising diagnostic test, has been developed for detection of different pathogens of human as well as animals. Various positive points support its use as a field level test but the major problem is product cross contamination leading to false positive results. Different methods were adopted by various researchers to control this false positive amplification due to cross contamination but all have their own advantages and disadvantages. A new closed tube LAMP assay based on agar dye capsule was developed in the present study and this technique has some advantages over the other closed tube technique.Agar at the concentration of 1.5% was used to sandwich SYBR green dye I with the aid of intradermal syringe. This agar dye capsule was placed over the LAMP reaction mixture before it was amplified. To eliminate the hazardous nature of Ultra Violet (UV) light during result visualization of LAMP products, the present study demonstrates the use of Light Emitting Diode (LED) lights for result visualization. LAMP was carried out for Brucella species detection using this modified techniques yielding good results without any cross contamination and LED showed similar fluorescence compared to UV.
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Affiliation(s)
- K Karthik
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Bareilly 243122, India
| | - Rajesh Rathore
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Bareilly 243122, India
| | - Prasad Thomas
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Bareilly 243122, India
| | - T R Arun
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Bareilly 243122, India
| | - K N Viswas
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Bareilly 243122, India
| | - Kuldeep Dhama
- Division of Pathology, Indian Veterinary Research Institute, Bareilly 243122, India
| | - R K Agarwal
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Bareilly 243122, India
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de Paz HD, Brotons P, Muñoz-Almagro C. Molecular isothermal techniques for combating infectious diseases: towards low-cost point-of-care diagnostics. Expert Rev Mol Diagn 2014; 14:827-43. [PMID: 25052202 PMCID: PMC7103708 DOI: 10.1586/14737159.2014.940319] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nucleic acid amplification techniques such as PCR have facilitated rapid and accurate diagnosis in central laboratories over the past years. PCR-based amplifications require high-precision instruments to perform thermal cycling reactions. Such equipment is bulky, expensive and complex to operate. Progressive advances in isothermal amplification chemistries, microfluidics and detectors miniaturisation are paving the way for the introduction and use of compact ‘sample in-results out’ diagnostic devices. However, this paradigm shift towards decentralised testing poses diverse technological, economic and organizational challenges both in industrialized and developing countries. This review describes the landscape of molecular isothermal diagnostic techniques for infectious diseases, their characteristics, current state of development, and available products, with a focus on new directions towards point-of-care applications.
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Affiliation(s)
- Hector David de Paz
- Department of Molecular Microbiology, Hospital Sant Joan de Déu, University of Barcelona, Barcelona 08950, Spain
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Lang X, Wan Z, Bu Z, Wang X, Wang X, Zhu L, Wan J, Sun Y, Wang X. Catabolite control protein A is an important regulator of metabolism in Streptococcus suis type 2. Biomed Rep 2014; 2:709-712. [PMID: 25054015 DOI: 10.3892/br.2014.307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 06/06/2014] [Indexed: 12/28/2022] Open
Abstract
Streptococcus suis (S. suis) type 2 is an extremely important Gram-positive bacterial pathogen that can cause human or swine endocarditis, meningitis, bronchopneumonia, arthritis and sepsis. Catabolite control protein A (CcpA) is a major transcriptional regulator in S. suis type 2 that functions in catabolite control, specifically during growth on glucose or galactose. The regulation of central metabolism can affect the virulence of bacteria. In the present study, a metabolomics approach was used along with principal components analysis (PCA) and partial least-squares-discriminant analysis (PLS-DA) models and 37 metabolites were found that differed substantially between native S. suis and a mutant lacking CcpA. These results showed that CcpA is an important protein in S. suis type 2 for studying bacterial protein function.
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Affiliation(s)
- Xulong Lang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Zhonghai Wan
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Zhaoyang Bu
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Xiuran Wang
- School of Life Science, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Xiaoxu Wang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Lingwei Zhu
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Jiayu Wan
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Yang Sun
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
| | - Xinglong Wang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China ; Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Jilin Agricultural University, Changchun, Jilin 130122, P.R. China
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Feng Y, Zhang H, Wu Z, Wang S, Cao M, Hu D, Wang C. Streptococcus suis infection: an emerging/reemerging challenge of bacterial infectious diseases? Virulence 2014; 5:477-97. [PMID: 24667807 PMCID: PMC4063810 DOI: 10.4161/viru.28595] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Streptococcus suis (S. suis) is a family of pathogenic gram-positive bacterial strains that represents a primary health problem in the swine industry worldwide. S. suis is also an emerging zoonotic pathogen that causes severe human infections clinically featuring with varied diseases/syndromes (such as meningitis, septicemia, and arthritis). Over the past few decades, continued efforts have made significant progress toward better understanding this zoonotic infectious entity, contributing in part to the elucidation of the molecular mechanism underlying its high pathogenicity. This review is aimed at presenting an updated overview of this pathogen from the perspective of molecular epidemiology, clinical diagnosis and typing, virulence mechanism, and protective antigens contributing to its zoonosis.
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Affiliation(s)
- Youjun Feng
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases & State Key Laboratory for Diagnosis and Treatment of Infectious Disease; First Affiliated Hospital; Zhejiang University School of Medicine; Hangzhou, Zhejiang, PR China; Department of Medical Microbiology and Parasitology; Zhejiang University School of Medicine; Hangzhou, Zhejiang, PR China
| | - Huimin Zhang
- University of Illinois at Urbana-Champaign (UIUC); Urbana, IL USA
| | - Zuowei Wu
- Department of Veterinary Microbiology and Preventive Medicine; Iowa State University; Ames, IA USA
| | - Shihua Wang
- College of Life Sciences; Fujian Agriculture and Forestry University; Fuzhou, Fujian, PR China
| | - Min Cao
- Department of Epidemiology; Research Institute for Medicine of Nanjing Command; Nanjing, Jiangsu, PR China
| | - Dan Hu
- Department of Epidemiology; Research Institute for Medicine of Nanjing Command; Nanjing, Jiangsu, PR China
| | - Changjun Wang
- Department of Epidemiology; Research Institute for Medicine of Nanjing Command; Nanjing, Jiangsu, PR China
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