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Lv X, Zhang Z, Zhao Y, Sun X, Jiang H, Zhang S, Sun X, Qiu X, Li Y. Label-free detection of virus based on surface-enhanced Raman scattering. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123087. [PMID: 37406546 PMCID: PMC10300235 DOI: 10.1016/j.saa.2023.123087] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/07/2023]
Abstract
Due to the background interference from biological samples, detecting viruses using surface-enhanced Raman scattering (SERS) in clinical samples is challenging. This study is based on SERS by reducing sodium borohydride and aggregating silver nanoparticles to develop suitable virus detection "hot spot." The monkeypox virus and human papillomavirus fingerprints were quickly obtained, tested, and identified in serum and artificial vaginal discharge, respectively, by combining the principal component analysis method. Therefore, these viruses were successfully identified in the biological background. In addition, the lowest detection limit was 100 copies/mL showing good reproducibility and signal-to-noise ratio. The concentration-dependent curve of the monkeypox virus had a good linear relationship. This method helps solve the SERS signal interference problem in complex biological samples, with low detection limits and high selectivity in virus characterization and quantitative analysis. Therefore, this method has a reasonable prospect of clinical application.
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Affiliation(s)
- Xinpeng Lv
- Department of Emergency Medicine, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - Zhe Zhang
- School of Pharmacy, Harbin Medical University, Harbin 150081, China
| | - Yue Zhao
- School of Pharmacy, Harbin Medical University, Harbin 150081, China
| | - Xiaomeng Sun
- School of Pharmacy, Harbin Medical University, Harbin 150081, China
| | - Heng Jiang
- College of Public Health, Harbin Medical University, Baojian Road No. 157, Harbin, Heilongjiang Province 150081, China
| | - Shuwen Zhang
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - Xianqi Sun
- Department of Dermatology, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - Xiaohong Qiu
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Harbin Medical University, Harbin 150081, China.
| | - Yang Li
- School of Pharmacy, Harbin Medical University, Harbin 150081, China; Research Unit of Health Sciences and Technology (HST), Faculty of Medicine University of Oulu, Oulu 90220, Finland; Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical University, Harbin 150081, China.
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Pomari E, Mori A, Accordini S, Donini A, Cordioli M, Tacconelli E, Castilletti C. Evaluation of a ddPCR Commercial Assay for the Absolute Quantification of the Monkeypox Virus West Africa in Clinical Samples. Diagnostics (Basel) 2023; 13:diagnostics13071349. [PMID: 37046567 PMCID: PMC10093040 DOI: 10.3390/diagnostics13071349] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 03/23/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023] Open
Abstract
BACKGROUND Monkeypox virus (MPXV) is a double-stranded DNA virus belonging to the orthopoxvirus genus in the family Poxviridae. Distinct clades are identified: the clade I belonging to the Central African (or Congo Basin) clade and the subclades IIa and IIb belonging to the West African clade. Here, a commercial droplet digital PCR (ddPCR) assay was evaluated for the quantification of the MPXV West Africa clade in clinical samples. METHODS The ddPCR reaction was assessed as a duplex assay using RPP30 as an internal amplification control. A total of 60 clinical specimens were tested, 40 positives (skin lesions, n=10; rectal swabs, n = 10; pharyngeal swabs, n = 10; and whole blood, n = 10), and 20 negatives (n = 5 for each biological matrix) were found at the routine molecular diagnostics (orthopoxvirus qPCR followed by confirmation with Sanger sequencing). To evaluate the analytical sensitivity, the ddPCR reaction was first analyzed on serial dilutions of synthetic DNA spiked in water and in negative biological matrices, achieving a limit of detection of 3.5 copy/µL. RESULTS Regarding the clinical samples, compared to routine molecular diagnostics, the ddPCR duplex assay showed 100% of specificity for all biological matrices and 100% sensitivity (10/10) for lesions, 100% (10/10) for rectal swabs, 90% (9/10) for pharyngeal swabs, and 60% (6/10) for whole blood. CONCLUSION Overall, our data showed that the commercial ddPCR assay allowed the DNA detection of MPXV in 87.5% (35/40) of our cohort, highlighting useful technical indications for the different specimens with a potential greatest performance for skin lesions and rectal swabs.
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Affiliation(s)
- Elena Pomari
- Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy
| | - Antonio Mori
- Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy
| | - Silvia Accordini
- Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy
| | - Annalisa Donini
- Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy
| | - Maddalena Cordioli
- Division of Infectious Diseases, Department of Diagnostic and Public Health, University of Verona, 37100 Verona, Italy
- Division of Infectious Diseases, Department of Medicine, Verona University Hospital, 37100 Verona, Italy
| | - Evelina Tacconelli
- Division of Infectious Diseases, Department of Medicine, Verona University Hospital, 37100 Verona, Italy
| | - Concetta Castilletti
- Department of Infectious, Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy
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The evolving epidemiology of monkeypox virus. Cytokine Growth Factor Rev 2022; 68:1-12. [PMID: 36244878 PMCID: PMC9547435 DOI: 10.1016/j.cytogfr.2022.10.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/28/2022] [Accepted: 10/06/2022] [Indexed: 02/07/2023]
Abstract
Monkeypox, caused by the monkeypox virus (MPXV), is a zoonotic disease endemic mainly in West and Central Africa. As of 27 September 2022, human monkeypox has occurred in more than 100 countries (mostly in non-endemic regions) and caused over 66,000 confirmed cases, which differs from previous epidemics that mainly affected African countries. Due to the increasing number of confirmed cases worldwide, the World Health Organization (WHO) has declared the monkeypox outbreak as a Public Health Emergency of International Concern on July 23, 2022. The international outbreak of human monkeypox represents a novel route of transmission for MPXV, with genital lesions as the primary infection, and the emergence of monkeypox in the current outbreak is also new, as novel variants emerge. Clinical physicians and scientists should be aware of this emerging situation, which presents a different scenario from previous outbreaks. In this review, we will discuss the molecular virology, evasion of antiviral immunity, epidemiology, evolution, and detection of MPXV, as well as prophylaxis and treatment strategies for monkeypox. This review also emphasizes the integration of relevant epidemiological data with genomic surveillance data to obtain real-time data, which could formulate prevention and control measures to curb this outbreak.
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Cardeti G, Cersini A, Manna G, De Santis P, Scicluna MT, Albani A, Simula M, Sittinieri S, De Santis L, De Liberato C, Ngakan PO, Wahid I, Carosi M. Detection of viruses from feces of wild endangered Macaca maura: a potential threat to moor macaque survival and for zoonotic infection. BMC Vet Res 2022; 18:418. [PMID: 36447236 PMCID: PMC9706849 DOI: 10.1186/s12917-022-03506-y] [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: 08/04/2022] [Accepted: 11/07/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND To date, there is a scarcity of information and literature on Macaca maura health status relative to viral diseases. The objectives of the present study were to investigate on the potential spread of enteric and non-enteric viruses shed in the environment through a wild macaque feces and to understand the possible interrelation in the spread of zoonotic viruses in a poorly studied geographical area, the Sulawesi Island. This study will also contribute providing useful information on potential threats to the health of this endangered species. METHODS The sampling was conducted between 2014 and 2016 in the Bantimurung Bulusaraung National Park, in the south of the Sulawesi Island and non-invasive sampling methods were used to collect fresh stools of the M. maura, one of the seven macaque species endemic to the island of Sulawesi, Indonesia. The population under study consisted in two wild, neighboring social macaque groups with partially overlapping home ranges; twenty-four samples were collected and examined using negative staining electron microscopy and a panel of PCR protocols for the detection of ten RNA and two DNA viruses. RESULTS Viral particles resembling parvovirus (5 samples), picornavirus (13 samples) and calicivirus (13 samples) were detected by electron microscopy whereas the PCR panel was negative for the 12 viruses investigated, except for one sample positive for a mosquito flavivirus. The results did not correlate with animal sex; furthermore, because all of the animals were clinically healthy, it was not possible to correlate feces consistency with viral presence. CONCLUSIONS As information on viral infections in wild moor macaques remains limited, further studies are yet required to identify the fecal-oral and blood transmitted potentially zoonotic viruses, which may infect the moor macaque and other macaque species endemic to the South Sulawesi Island.
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Affiliation(s)
- Giusy Cardeti
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Antonella Cersini
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Giuseppe Manna
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Paola De Santis
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Maria Teresa Scicluna
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Alessandro Albani
- grid.8509.40000000121622106Department of Sciences, Roma Tre University, Rome, Italy ,Royal Society for the Protection of Birds/Gola Rainforest National Park, Kenema, Sierra Leone
| | - Massimiliano Simula
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Stefania Sittinieri
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Laura De Santis
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Claudio De Liberato
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, Rome, Italy
| | - Putu Oka Ngakan
- grid.412001.60000 0000 8544 230XFaculty of Forestry, Hasanuddin University, Makassar, Sulawesi Indonesia
| | - Isra Wahid
- grid.412001.60000 0000 8544 230XFaculty of Medicine, Hasanuddin University, Makassar, Sulawesi Indonesia
| | - Monica Carosi
- grid.8509.40000000121622106Department of Sciences, Roma Tre University, Rome, Italy
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Meyer H, Ehmann R, Smith GL. Smallpox in the Post-Eradication Era. Viruses 2020; 12:E138. [PMID: 31991671 PMCID: PMC7077202 DOI: 10.3390/v12020138] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 12/19/2022] Open
Abstract
Widespread vaccination programmes led to the global eradication of smallpox, which was certified by the World Health Organisation (WHO), and, since 1978, there has been no case of smallpox anywhere in the world. However, the viable variola virus (VARV), the causative agent of smallpox, is still kept in two maximum security laboratories in Russia and the USA. Despite the eradication of the disease smallpox, clandestine stocks of VARV may exist. In a rapidly changing world, the impact of an intentional VARV release in the human population would nowadays result in a public health emergency of global concern: vaccination programmes were abolished, the percentage of immunosuppressed individuals in the human population is higher, and an increased intercontinental air travel allows for the rapid viral spread of diseases around the world. The WHO has authorised the temporary retention of VARV to enable essential research for public health benefit to take place. This work aims to develop diagnostic tests, antiviral drugs, and safer vaccines. Advances in synthetic biology have made it possible to produce infectious poxvirus particles from chemicals in vitro so that it is now possible to reconstruct VARV. The status of smallpox in the post-eradication era is reviewed.
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Affiliation(s)
- Hermann Meyer
- Bundeswehr Institute of Microbiology, 80937 Munich, Germany
| | - Rosina Ehmann
- Bundeswehr Institute of Microbiology, 80937 Munich, Germany
| | - Geoffrey L. Smith
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, UK;
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Puro V, Fusco FM, Castilletti C, Carletti F, Colavita F, Agrati C, Di Caro A, Capobianchi MR, Ippolito G. Occupational transmission of an Orthopoxvirus infection during an outbreak in a colony of Macaca tonkeana in Lazio Region, Italy, 2015. Zoonoses Public Health 2018; 65:578-583. [PMID: 29512303 PMCID: PMC7165952 DOI: 10.1111/zph.12459] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Indexed: 01/28/2023]
Abstract
Orthopoxviruses spill over from animal reservoirs to accidental hosts, sometimes causing human infections. We describe the surveillance and infection control measures undertaken during an outbreak due to an Orthopoxvirus occurred in January 2015 in a colony of Macaca tonkeana in the province of Rieti, Latio, Italy, which caused a human asymptomatic infection. According to the epidemiological investigation, the human transmission occurred after an unprotected exposure. The contacts among wild, captive and domestic animals and humans, together with decreased immunity against Orthopoxviruses in the community, may put animal handlers at risk of infection, especially after the cessation of smallpox vaccination. To reduce these threats, standard precautions including respiratory hygiene and transmission‐based precautions should be carefully applied also in veterinary medicine.
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Affiliation(s)
- V Puro
- Epidemiology and Pre-clinical Research Department, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - F M Fusco
- Epidemiology and Pre-clinical Research Department, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - C Castilletti
- Laboratory of Virology, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - F Carletti
- Laboratory of Virology, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - F Colavita
- Laboratory of Virology, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - C Agrati
- Cellular Immunology Laboratory, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - A Di Caro
- Laboratory of Virology, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - M R Capobianchi
- Laboratory of Virology, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
| | - G Ippolito
- Scietific Direction, National Institute for Infectious Diseases "L. Spallanzani", Rome, Italy
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A Model to Detect Autochthonous Group 1 and 2 Brazilian Vaccinia virus Coinfections: Development of a qPCR Tool for Diagnosis and Pathogenesis Studies. Viruses 2017; 10:v10010015. [PMID: 29301202 PMCID: PMC5795428 DOI: 10.3390/v10010015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/22/2017] [Accepted: 12/29/2017] [Indexed: 11/16/2022] Open
Abstract
Vaccinia virus (VACV) is the etiological agent of bovine vaccinia (BV), an emerging zoonosis that has been associated with economic losses and social effects. Despite increasing reports of BV outbreaks in Brazil, little is known about the biological interactions of Brazilian VACV (VACV-BR) isolates during coinfections; furthermore, there are no tools for the diagnosis of these coinfections. In this study, a tool to co-detect two variants of VACV was developed to provide new information regarding the pathogenesis, virulence profile, and viral spread during coinfection with VACV-BR isolates. To test the quantitative polymerase chain reactions (qPCR) tool, groups of BALB/c mice were intranasally monoinfected with Pelotas virus 1-Group II (PV1-GII) and Pelotas virus 2-Group I (PV2-GI), or were coinfected with PV1-GII and PV2-GI. Clinical signs of the mice were evaluated and the viral load in lung and spleen were detected using simultaneous polymerase chain reactions (PCR) targeting the A56R (hemagglutinin) gene of VACV. The results showed that qPCR for the quantification of viral load in coinfection was efficient and highly sensitive. Coinfected mice presented more severe disease and a higher frequency of VACV detection in lung and spleen, when compared to monoinfected groups. This study is the first description of PV1 and PV2 pathogenicity during coinfection in mice, and provides a new method to detect VACV-BR coinfections.
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Cardeti G, Gruber CEM, Eleni C, Carletti F, Castilletti C, Manna G, Rosone F, Giombini E, Selleri M, Lapa D, Puro V, Di Caro A, Lorenzetti R, Scicluna MT, Grifoni G, Rizzoli A, Tagliapietra V, De Marco L, Capobianchi MR, Autorino GL. Fatal Outbreak in Tonkean Macaques Caused by Possibly Novel Orthopoxvirus, Italy, January 2015 1. Emerg Infect Dis 2017; 23:1941-1949. [PMID: 28975882 PMCID: PMC5708245 DOI: 10.3201/eid2312.162098] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In January 2015, during a 3-week period, 12 captive Tonkean macacques at a sanctuary in Italy died. An orthopoxvirus infection was suspected because of negative-staining electron microscopy results. The diagnosis was confirmed by histology, virus isolation, and molecular analysis performed on different organs from all animals. An epidemiologic investigation was unable to define the infection source in the surrounding area. Trapped rodents were negative by virologic testing, but specific IgG was detected in 27.27% of small rodents and 14.28% of rats. An attenuated live vaccine was administered to the susceptible monkey population, and no adverse reactions were observed; a detectable humoral immune response was induced in most of the vaccinated animals. We performed molecular characterization of the orthopoxvirus isolate by next-generation sequencing. According to the phylogenetic analysis of the 9 conserved genes, the virus could be part of a novel clade, lying between cowpox and ectromelia viruses.
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Olson VA, Shchelkunov SN. Are We Prepared in Case of a Possible Smallpox-Like Disease Emergence? Viruses 2017; 9:E242. [PMID: 32962316 PMCID: PMC5618008 DOI: 10.3390/v9090242] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/22/2017] [Accepted: 08/23/2017] [Indexed: 12/16/2022] Open
Abstract
Smallpox was the first human disease to be eradicated, through a concerted vaccination campaign led by the World Health Organization. Since its eradication, routine vaccination against smallpox has ceased, leaving the world population susceptible to disease caused by orthopoxviruses. In recent decades, reports of human disease from zoonotic orthopoxviruses have increased. Furthermore, multiple reports of newly identified poxviruses capable of causing human disease have occurred. These facts raise concerns regarding both the opportunity for these zoonotic orthopoxviruses to evolve and become a more severe public health issue, as well as the risk of Variola virus (the causative agent of smallpox) to be utilized as a bioterrorist weapon. The eradication of smallpox occurred prior to the development of the majority of modern virological and molecular biological techniques. Therefore, there is a considerable amount that is not understood regarding how this solely human pathogen interacts with its host. This paper briefly recounts the history and current status of diagnostic tools, vaccines, and anti-viral therapeutics for treatment of smallpox disease. The authors discuss the importance of further research to prepare the global community should a smallpox-like virus emerge.
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Affiliation(s)
- Victoria A. Olson
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Sergei N. Shchelkunov
- Department of Genomic Research and Development of DNA Diagnostics of Poxviruses, State Research Center of Virology and Biotechnology VECTOR, Koltsovo, 630559 Novosibirsk Region, Russia
- Department of Molecular Biology, Novosibirsk State University, 630090 Novosibirsk, Russia
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Szén OP, Kiss A, Naár Z, Pál K. Evaluation of high-resolution melting and other molecular methods in discrimination of Lactobacillus isolates. J Appl Microbiol 2014; 117:1113-21. [PMID: 25040052 DOI: 10.1111/jam.12599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 06/08/2014] [Accepted: 07/14/2014] [Indexed: 11/30/2022]
Abstract
AIMS Fermented and probiotic products are mainly based on the activity of diverse Lactobacillus species. Distinguishing of these species, especially the closely related ones might be problematic. Our aim was to compare and evaluate molecular methods that have the potential of discrimination and might serve as alternatives of traditional microbiological techniques. METHODS AND RESULTS In our experiments, PCR methods using general and species-specific bacterial primers, RFLP, sequencing and HRM assays were tested and their efficiency compared. A new universal primer pair was designed for amplification of short fragments of the 16S rDNA of six Lactobacillus, a Lactococcus and a Streptococcus species; furthermore, successful HRM analysis was performed on them that resulted in the separation of each species, including the almost indistinguishable Lact. paracasei ssp. paracasei and Lact. paracasei ssp. tolerans subspecies. CONCLUSIONS The results showed that HRM might be a useful, time- and cost-saving one-step tool for preliminary classification of isolates, although the use of additional techniques, like species-specific PCR, analysis of RFLP patterns and sequencing, might be necessary for confirmation of the results. SIGNIFICANCE AND IMPACT OF THE STUDY The newly developed HRM primers offer a quick and efficient tool for discrimination of lactobacilli, including very closely related Lactobacillus subspecies.
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Affiliation(s)
- O P Szén
- Egerfood Regional Knowledge Centre, Eszterházy Károly College, Eger, Hungary
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11
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de Souza Trindade G, Li Y, Olson VA, Emerson G, Regnery RL, da Fonseca FG, Kroon EG, Damon I. Real-time PCR assay to identify variants of Vaccinia virus: implications for the diagnosis of bovine vaccinia in Brazil. J Virol Methods 2008; 152:63-71. [PMID: 18602170 DOI: 10.1016/j.jviromet.2008.05.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2008] [Revised: 05/12/2008] [Accepted: 05/15/2008] [Indexed: 10/21/2022]
Abstract
Naturally occurring infections of Vaccinia virus (VACV) have been recognized in Brazil during the past 10 years. Human Brazilian Vaccinia virus (BVV) infections typically occur as a zoonosis transferred from affected dairy cows to their handlers. Outbreaks have caused notable economic losses to the rural community in the region. The origins of BVV are unclear but previous analyses have shown that at least two distinct clades of BVV exist. The aim of this study was to develop a rapid and inexpensive process for identification and differentiation of BVV that should facilitate epidemiological and ecological investigations including the improved diagnosis of Brazilian Orthopoxvirus infections. A SYBR green quantitative real-time polymerase chain reaction (PCR) targeting the hemagglutinin gene was developed to identify different populations of BVV, VACV vaccine strains used in Brazil during the smallpox eradication campaign (Vaccinia Lister (VACV-LIS) and New York City Board of Health (VACV-NYCBH)), and currently available vaccines (VACV-NYCBH DRYVAX and VACV-NYCBH Acambis 2000). Three primer combinations (one to amplify many orthopoxviruses including all vaccinia viruses described so far; one to differentiate BVV from vaccine strains (VACV-LIS, VACV-NYCBH DRYVAX and VACV-NYCBH Acambis 2000); and one to differentiate BVV clades) were designed to work at the same annealing temperature and reaction conditions. In addition, these methods were able to detect orthopoxvirus viral DNA in lesion biopsy material without the need for DNA extraction.
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Affiliation(s)
- Giliane de Souza Trindade
- Division of Viral and Rickettsial Diseases National Center for Zoonotic, Vector-Borne and Enteric Diseases, Coordinating Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, United States.
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12
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Zheng ZB, Wu YD, Yu XL, Shang SQ. DNA microarray technology for simultaneous detection and species identification of seven human herpes viruses. J Med Virol 2008; 80:1042-50. [DOI: 10.1002/jmv.21131] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Erali M, Pounder JI, Woods GL, Petti CA, Wittwer CT. Multiplex Single-Color PCR with Amplicon Melting Analysis for Identification of Aspergillus Species. Clin Chem 2006; 52:1443-5. [PMID: 16798978 DOI: 10.1373/clinchem.2006.068510] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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