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Filippi M, Demoliner M, Gularte JS, de Abreu Goes Pereira VM, da Silva MS, Girardi V, Hansen AW, Spilki FR. Relative frequency of genomic mutations in SARS-CoV-2 recovered from southern Brazilian cases of COVID-19 through the Gamma, Delta and Omicron waves. Infect Genet Evol 2024; 120:105590. [PMID: 38574833 DOI: 10.1016/j.meegid.2024.105590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/28/2024] [Accepted: 03/31/2024] [Indexed: 04/06/2024]
Abstract
The presence of different mutations in the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genome can be related to changes in coronavirus disease (COVID-19) infection. Besides, these viral alterations associated with factors such as massive number of positive cases, vaccination and reinfections can be important in the viral evolution process. As well as, mutations found at low frequencies may have a more neutral action and consequently be less inclined to negative selection, facilitating their spread through the population. Related to that, we aimed to present mutations that are possibly relevant in the process of viral evolution found in 115 SARS-CoV-2 sequences from samples of individuals residing in the metropolitan region of Porto Alegre in the state of Rio Grande do Sul, Brazil. The genome from clinical samples was sequenced using High-Throughput Sequencing (HTS) and analyzed using a workflow to map reads and find variations/SNPs. The samples were separated into 3 groups considering the sample lineage. Of the total number of analyzed sequences, 35 were from the Gamma lineage, 35 from Delta and 45 from Omicron. Amino acid changes present in frequencies lower than 80% of the reads in the sequences were evaluated. 11 common mutations among the samples were found in the Gamma lineage, 1 in the ORF1ab gene, 7 in the S gene, 2 in the ORF6 gene and 1 in the ORF7a gene. While in the Delta lineage, a total of 11 mutations distributed in the ORF1ab, S, ORF7a and N genes, 2, 7, 1 and 1 mutation were found in each gene, respectively. And finally, in the Omicron, 16 mutations were identified, 2 in the ORF1ab gene, 12 in the S gene and 2 in the M gene. In conclusion, we emphasize that genomic surveillance can be a useful tool to assess how mutations play a key role in virus adaptation, and its process of susceptibility to new hosts showing the possible signs of viral evolution.
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Affiliation(s)
- Micheli Filippi
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil.
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | | | - Mariana Soares da Silva
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Viviane Girardi
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
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Sita A, Birlem GE, de Souza da Silva D, Possamai GM, Petry K, de Almeida PR, Mallmann L, Stein JF, Demoliner M, Gularte JS, Hansen AW, Witt AA, Rigotto C, Fleck JD, Spilki FR, da Rocha DT, Weber MN. Evaluation of Mastadenovirus and Rotavirus Presence in Phyllostomid, Vespertilionid, and Molossid Bats Captured in Rio Grande do Sul, Southern Brazil. Food Environ Virol 2024:10.1007/s12560-023-09575-y. [PMID: 38532064 DOI: 10.1007/s12560-023-09575-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/28/2023] [Indexed: 03/28/2024]
Abstract
Bat-borne viruses may affect public health and the global economy. These mammals have a wide geographical distribution and unique biological, physiological, and immunogenic characteristics, allowing the dissemination of many known and unknown viruses. Enteric viruses, such as adeno (AdV) and rotaviruses, are recognized as the main causative agents of disease and outbreaks. In the present study, the presence of viruses from Adenoviridae and Reoviridae families was evaluated in molossid, phyllostomid, and vespertilionid bats captured in Rio Grande do Sul, Southern Brazil, between September 2021 and July 2022. Sixty bat rectal swabs were analyzed by PCR. Eight (13.3%) samples were positive for adenovirus and classified as human mastadenovirus C (HAdV-C) (three samples) and HAdV-E (five samples) by sequencing followed by phylogenetic analysis. All samples were negative in rotavirus specific RT-PCR. This is the first study to describe the presence of HAdV in samples of Glossophaga soricina, Eptesicus brasiliensis, and Histiotus velatus. Furthermore, the presence of HAdV-E in bats was reported, which is unusual and may suggest that other HAdV genotypes, in addition to HAdV-C, may also be harbored by wild animals. The data generated in the present study reinforces the importance of eco-surveillance of viral agents related to diseases in humans and wild animals. In addition, it is essential to identify possible new hosts or reservoirs that increase the risk of spillover and dissemination of infectious pathogens, helping to prevent and control zoonotic diseases.
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Affiliation(s)
- Alexandre Sita
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Gabriela Espíndola Birlem
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Deivid de Souza da Silva
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Gabriela Mattos Possamai
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Karla Petry
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Paula Rodrigues de Almeida
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
- Hospital Veterinário, Universidade Feevale, Campo Bom, Rio Grande Do Sul, Brazil
| | - Larissa Mallmann
- Hospital Veterinário, Universidade Feevale, Campo Bom, Rio Grande Do Sul, Brazil
| | - Janaína Franciele Stein
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - André Alberto Witt
- Secretaria da Agricultura, Pecuária, Produção Sustentável e Irrigação Do Rio Grande Do Sul (SEAPI-RS), Porto Alegre, Rio Grande Do Sul, Brazil
| | - Caroline Rigotto
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Juliane Deise Fleck
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil
- Hospital Veterinário, Universidade Feevale, Campo Bom, Rio Grande Do Sul, Brazil
| | - Daniela Tonini da Rocha
- Centro de Diagnóstico E Pesquisa Em Patologia Aviária (CDPA), Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, Rio Grande Do Sul, Brazil
| | - Matheus Nunes Weber
- Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Rio Grande Do Sul, Brazil.
- Hospital Veterinário, Universidade Feevale, Campo Bom, Rio Grande Do Sul, Brazil.
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Gularte JS, Sacchetto L, Demoliner M, Girardi V, da Silva MS, Filippi M, Pereira VMDAG, Hansen AW, da Silva LL, Fleck JD, de Almeida PR, Nogueira ML, Spilki FR. DENV-1 genotype V linked to the 2022 dengue epidemic in Southern Brazil. J Clin Virol 2023; 168:105599. [PMID: 37751628 DOI: 10.1016/j.jcv.2023.105599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 08/31/2023] [Accepted: 09/20/2023] [Indexed: 09/28/2023]
Abstract
Even though Brazil is a country where the dengue virus (DENV) is endemic, until recently, Southern states did not have significant viral circulation, such as Rio Grande do Sul (RS), and some municipalities were even considered dengue-free. During 2022, these places have shown a sharp increase in the incidence of the disease, apparently following a worldwide growth pattern. Therefore, in this study, we monitor and characterize the genetic diversity of DENV circulating in southern Brazil through next-generation sequencing during an outbreak in 2022. We generated 70 DENV-1 genome sequences, all characterized as genotype V, divided into two clade clusters in the L1 lineage. Furthermore, unique mutations have been described in each clade of L1 lineage. Our results are essential in managing outbreaks since these data provide important information during the emergence of DENV circulation in RS. Since the south of Brazil has a lower viral circulation when compared to other Brazilian states, RS still lacks data that can help in understanding the transmission, dissemination, and evolution of the dengue virus. Hence, genomic surveillance efforts are essential to increase the accuracy of preventive actions and to control viral dissemination.
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Affiliation(s)
- Juliana Schons Gularte
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil.
| | - Lívia Sacchetto
- Faculdade de Medicina de São José do Rio Preto, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Laboratório de Pesquisas em Virologia. Avenida Brigadeiro Faria Lima, 5416, Vila São José, CEP 15090000, São José do Rio Preto, SP, Brazil
| | - Meriane Demoliner
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | - Viviane Girardi
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | - Mariana Soares da Silva
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | - Micheli Filippi
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | | | - Alana Witt Hansen
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | | | - Juliane Deise Fleck
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | - Paula Rodrigues de Almeida
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
| | - Maurício Lacerda Nogueira
- Faculdade de Medicina de São José do Rio Preto, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Laboratório de Pesquisas em Virologia. Avenida Brigadeiro Faria Lima, 5416, Vila São José, CEP 15090000, São José do Rio Preto, SP, Brazil; Department of Pathology, The University of Texas Medical Branch, Galveston, TX, United States of America
| | - Fernando Rosado Spilki
- Universidade Feevale, Laboratório de Microbiologia Molecular, Rodovia ERS-239, n° 2755, Vila Nova, CEP 93525-075, Novo Hamburgo, RS, Brazil
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Girardi V, Gularte JS, Demoliner M, da Silva MS, Filippi M, de Abreu Góes Pereira VM, Hansen AW, Rosa RB, Fleck JD, Spilki FR. Reinfection by SARS-CoV-2 by divergent Omicron sublineages, 16 days apart. Braz J Microbiol 2023; 54:1847-1851. [PMID: 37269428 PMCID: PMC10239041 DOI: 10.1007/s42770-023-01018-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/09/2023] [Indexed: 06/05/2023] Open
Abstract
Since the beginning of the SARS-CoV-2 pandemic, studies on the variants and sublineages stand out, mainly in the cases of reinfection in a short period. In this study, we describe a case of infection by BA.1.1 sublineage in an individual from Southern Brazil. The same patient acquired reinfection with sublineage BA.2 within 16 days after the first detection. The viral extraction and RT-qPCR were performed on the samples LMM72045 (collected in May 2022) and LMM72044 (collected in June 2022). After the confirmation of SARS-CoV-2 infection, we conducted the sequencing and viral genome analysis. This case of reinfection affected a 52-year-old male patient, without comorbidities, with three doses of vaccines against COVID-19, showing symptoms on May 19. These symptoms lasted for approximately six days. The patient returned to work activities on May 30. However, on June 4, the patient felt a new round of clinical signs that lasted for approximately seven days. Analysis of the viral genomes recovered from patients' clinical samples revealed that the two COVID-19 episodes were related to two divergent VOC Omicron sublineages, namely, BA.1.1 for the first round of symptoms and BA.2 for the second infection. Based on our findings, we can say that the present case of reinfection is the shortest described so far.
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Affiliation(s)
- Viviane Girardi
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil.
| | - Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Mariana Soares da Silva
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Micheli Filippi
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Vyctoria Malayhka de Abreu Góes Pereira
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Raquel Borba Rosa
- Secretaria Municipal de Saúde, Porto Alegre, Rio Grande Do Sul, Brazil
| | - Juliane Deise Fleck
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, N° 2755, Prédio Vermelho, Piso 1, Sala 103, Vila Nova, CEP, Novo Hamburgo, RS, 93525-075, Brazil
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Filippi M, Ribeiro Amorim M, Soares da Silva M, Schons Gularte J, Demoliner M, Girardi V, de Abreu Goes Pereira VM, Witt Hansen A, Fleck JD, Frohlich J, de-Paris F, Motta Rodrigues G, Aparecida Risczik Arruda Correa J, Machado Arlindo De Mattos E, Minuto Paiva R, Deutschendorf C, Soares Falcetta F, Proença Modena JL, Rosado Spilki F. Prolonged SARS-CoV-2 Infection and Intra-Patient Viral Evolution in an Immunodeficient Child. Pediatr Infect Dis J 2023; 42:212-217. [PMID: 36728777 PMCID: PMC9935232 DOI: 10.1097/inf.0000000000003782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/30/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND With the progression of the Coronavirus disease pandemic, the number of mutations in the viral genome has increased, showing the adaptive evolution of severe acute respiratory syndrome coronavirus 2 in humans and intensification in transmissibility. Long-term infections also allow the development of viral diversity. In this study, we report the case of a child with severe combined immu presenting a prolonged severe acute respiratory syndrome coronavirus 2 infection. We aimed to analyze 3 naso-oropharyngeal swab samples collected between August and December 2021 to describe the amino acid changes present in the sequence reads that may have a role in the emergence of new viral variants. METHODS The whole genome from clinical samples was sequenced through high throughput sequencing and analyzed using a workflow to map reads and then find variations/single-nucleotide polymorphisms. In addition, the samples were isolated in cell culture, and a plaque forming units assay was performed, which indicates the presence of viable viral particles. RESULTS The results obtained showed that the virus present in all samples is infectious. Also, there were 20 common mutations among the 3 sequence reads, found in the ORF1ab and ORF10 proteins. As well, a considerable number of uncommon mutations were found. CONCLUSIONS In conclusion, we emphasize that genomic surveillance can be a useful tool to assess possible evolution signals in long-term patients.
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Affiliation(s)
- Micheli Filippi
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Mariene Ribeiro Amorim
- Laboratório de Vírus Emergentes, Departamento de Genética, Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Mariana Soares da Silva
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Juliana Schons Gularte
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Meriane Demoliner
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Viviane Girardi
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | | | - Alana Witt Hansen
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Juliane Deise. Fleck
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Júlia Frohlich
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Fernanda de-Paris
- Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | | | | | | | | | | | | | - José Luiz Proença Modena
- Laboratório de Vírus Emergentes, Departamento de Genética, Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Fernando Rosado Spilki
- From the Laboratório de Microbiologia Molecular, Departamento de Virologia, Universidade Feevale, Novo Hamburgo, Rio Grande do Sul, Brazil
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Hoffmann AT, da Silva MS, Gularte JS, Pasqualotto AC, Proença Módena JL, Hansen AW, Stadñik CMB, Sukienik TCT, Demoliner M, Heldt FH, Filippi M, Pereira VMDAG, de Marques CG, Kohler II, Quevedo DMD, Spilki FR. Dynamics of nosocomial SARS-CoV-2 transmissions: Facing the challenge of variants of concern in a Brazilian reference hospital. J Med Virol 2023; 95:e28446. [PMID: 36579775 PMCID: PMC9880750 DOI: 10.1002/jmv.28446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 12/12/2022] [Accepted: 12/18/2022] [Indexed: 12/30/2022]
Abstract
The hospital environment can be considered a high risk for the occurrence of SARS-CoV-2 transmission outbreaks, either for health professionals who are directly involved in the care of suspected or confirmed cases of the disease, or for patients, for being in an environment more vulnerable to the acquisition of nosocomial infections. In this molecular epidemiology study, we aimed to analyze the occurrence and transmission dynamics of SARS-CoV-2 in outbreaks and local chains of transmission in a large tertiary teaching hospital in southern Brazil, in addition to verifying circulating strains and their epidemiological relation in the local context, from September 21, 2020 to October 5, 2021. Positive samples involved in COVID-19 clusters or outbreaks were analyzed using clinical, epidemiological and genomic data. Different lineages and sublineages among patients in the same room were observed. Most patients had their first clinical manifestation, evidence of suspicion, and diagnostic confirmation within 7-14 days or >14 days after hospital admission. The patients who have contact with confirmed cases of COVID-19 spent, on average, 6.28 days in the same environment until the positive test. There was a significant association between the outcome and the number of vaccine doses (p < 0.05), where those who received two doses presented a lower occurrence of death. There was a total replacement of variant of concern (VOC) Gamma by VOC Delta from August 2021 at the study site. Although the epidemiological analysis indicates nosocomial infections, through genomic sequencing, it was established that most of the hospital outbreaks had different origins. These findings highlight the utility of integrating epidemiological and genomic data to identify possible routes of viral entry and dissemination.
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Affiliation(s)
- Andressa Taíz Hoffmann
- Controle de Infecção HospitalarSanta Casa de Misericórdia de Porto AlegrePorto AlegreRio Grande do SulBrazil
| | - Mariana Soares da Silva
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Juliana Schons Gularte
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | | | | | - Alana Witt Hansen
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | | | | | - Meriane Demoliner
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Fágner Henrique Heldt
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Micheli Filippi
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | | | | | - Ionara Ines Kohler
- Laboratório de Análises ClínicasSanta Casa de Misericórdia de Porto AlegrePorto AlegreBrazil
| | | | - Fernando Rosado Spilki
- Laboratório de Microbiologia MolecularUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
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Nunes CC, Sita A, Mallmann L, Birlem GE, de Mattos LG, Da Silva DH, Furlanetto KO, Hansen AW, De Almeida PR, Fleck JD, Spilki FR, de Matos Almeida SE, Weber MN. HIV-1 genetic diversity and transmitted drug resistance to integrase strand transfer inhibitors among recently diagnosed adults in Porto Alegre, South Brazil. J Antimicrob Chemother 2022; 77:3510-3514. [PMID: 36272141 DOI: 10.1093/jac/dkac355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 09/29/2022] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES The HIV-1 genetic diversity and the presence of transmitted drug resistance mutations (TDRMs) against integrase strand transfer inhibitors (INSTIs) were assessed sequencing samples of antiretroviral (ARV)-naive HIV-1-infected individuals from South Brazil. METHODS Viral RNA from 42 ART-naive individuals was submitted to complete HIV-1 integrase gene amplification by RT-PCR and sequencing. RESULTS Viral strains carrying TDRMs against INSTIs were not detected in the present study. However, the polymorphisms L74M and L74I were each observed in 4.8% of the individuals. These accessory mutations have been reported as putative causes of TDRMs in ART with raltegravir, but only when associated with additional major mutations. When submitted to HIV-1 subtyping, 50% were classified as subtype C, 21% as recombinant BC, 19% as subtype B, 4.8% as subtype F1 and 4.8% as recombinant CF1. CONCLUSIONS All 42 ARV-naive individuals were apparently susceptible to INSTIs, included in the Brazilian therapeutic guideline since 2009. To the best of our knowledge, this is the first study to evaluate TDRMs against INSTIs in Brazil. The most prevalent HIV-1 subtypes were subtype C, followed by the recombinant BC and subtype B, which is in agreement with previous studies. However, the presence of subtype F1 and recombinant CF1 reported herein was not observed in previous studies.
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Affiliation(s)
- Cynara Carvalho Nunes
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil.,Serviço de Atendimento Especializado (SAE) Santa Marta, Secretaria Municipal de Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Alexandre Sita
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Larissa Mallmann
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Gabriela Espindola Birlem
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Larissa Gomes de Mattos
- Serviço de Atendimento Especializado (SAE) Santa Marta, Secretaria Municipal de Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Daila Haemk Da Silva
- Serviço de Atendimento Especializado (SAE) Santa Marta, Secretaria Municipal de Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Karen Oliveira Furlanetto
- Serviço de Atendimento Especializado (SAE) Santa Marta, Secretaria Municipal de Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Alana Witt Hansen
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Paula Rodrigues De Almeida
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Juliane Deise Fleck
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Fernando Rosado Spilki
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | | | - Matheus Nunes Weber
- Instituto de Ciências da Saúde, Laboratório de Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, RS, Brazil
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8
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Gularte JS, da Silva MS, Filippi M, Demoliner M, Schallenberger K, Hansen AW, de Abreu Góes Pereira VM, Heldt FH, Girardi V, Weber MN, de Almeida PR, Abbadi BL, Dornelles M, Bizarro CV, Machado P, Basso LA, Dellagostin OA, Fleck JD, Spilki FR. Viral isolation allows characterization of early samples of SARS-CoV-2 lineage B1.1.33 with unique mutations (S: H655Y and T63N) circulating in Southern Brazil in 2020. Braz J Microbiol 2022; 53:1313-1319. [PMID: 35778549 PMCID: PMC9428868 DOI: 10.1007/s42770-022-00789-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 06/28/2022] [Indexed: 11/25/2022] Open
Abstract
Different approaches are in use to improve our knowledge about the causative agent of coronavirus disease (COVID-19). Cell culture-based methods are the better way to perform viral isolation, evaluate viral infectivity, and amplify the virus. Furthermore, next-generation sequencing (NGS) have been essential to analyze a complete genome and to describe new viral species and lineages that have arisen over time. Four naso-oropharyngeal swab samples, collected from April to July of 2020, were isolated and sequenced aiming to produce viral stocks and analyze the mutational profile of the found lineage. B.1.1.33 was the lineage detected in all sequences. Although the samples belong to the same lineage, it was possible to evaluate different mutations found including some that were first described in these sequences, like the S:H655Y and T63N. The results described here can help to elicit how the pandemic started to spread and how it has been evolving in south Brazil.
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Affiliation(s)
- Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil.
| | - Mariana Soares da Silva
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Micheli Filippi
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Karoline Schallenberger
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | | | - Fágner Henrique Heldt
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Viviane Girardi
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Matheus Nunes Weber
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Paula Rodrigues de Almeida
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Bruno Lopes Abbadi
- Centro de Pesquisas Em Biologia Molecular E Funcional (CPBMF), Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, CEP 90619900, Brazil
| | - Maiele Dornelles
- Centro de Pesquisas Em Biologia Molecular E Funcional (CPBMF), Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, CEP 90619900, Brazil
| | - Cristiano Valim Bizarro
- Centro de Pesquisas Em Biologia Molecular E Funcional (CPBMF), Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, CEP 90619900, Brazil
| | - Pablo Machado
- Centro de Pesquisas Em Biologia Molecular E Funcional (CPBMF), Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, CEP 90619900, Brazil
| | - Luiz Augusto Basso
- Centro de Pesquisas Em Biologia Molecular E Funcional (CPBMF), Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, CEP 90619900, Brazil
| | - Odir Antonio Dellagostin
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Campus Universitário, Pelotas, RS, CEP 96010-900, Brazil
| | - Juliane Deise Fleck
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, nº 2755, Vila Nova, Novo Hamburgo, RS, CEP 93525-075, Brazil
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9
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Demoliner M, da Silva MS, Gularte JS, Hansen AW, de Almeida PR, Weber MN, Heldt FH, Silveira F, Filippi M, de Abreu Góes Pereira VM, da Silva FP, Mallmann L, Fink P, de Moura Valim AR, Possuelo LG, Fleck JD, Spilki FR. Predominance of SARS-CoV-2 P.1 (Gamma) lineage inducing the recent COVID-19 wave in southern Brazil and the finding of an additional S: D614A mutation. Infect Genet Evol 2021; 96:105134. [PMID: 34763050 PMCID: PMC8575543 DOI: 10.1016/j.meegid.2021.105134] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/20/2021] [Accepted: 11/04/2021] [Indexed: 12/20/2022]
Abstract
Recently, the highest wave of SARS-CoV-2 epidemic occurred since the beginning of the pandemic in Brazil was registered in Rio Grande do Sul (RS) State, Southern Brazil, considering the number of cases, deaths and hospitalization per day caused by COVID-19. In this study we described which lineages were circulating in the first quarter of 2021 in Southern Brazil to better understand the viral factors involved in the health crisis caused by SARS-CoV-2 in the region, searching also for possible additional SARS-CoV-2 sequence mutations. A total of 70 positive SARS-CoV-2 samples collected between January 28th, 2021 until April 23rd, 2021, were selected to sequencing. Whole genome sequencing of 70 SARS-CoV-2 samples showed a predominance of Gamma lineage (67%, 47/70), followed by P.2 lineage (27%, 19/70) and B.1.1.28 (6%, 4/70). Two Gamma lineage consensus sequences presented a new S:D614A mutation. Newly mutations could be emerging due the quick SARS-CoV-2 spreading. Thus, the greater understanding about immune protection and variants vigilance is essential to the better management of the health SARS-CoV-2 crisis.
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Affiliation(s)
- Meriane Demoliner
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil.
| | - Mariana Soares da Silva
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Juliana Schons Gularte
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Alana Witt Hansen
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | | | - Matheus Nunes Weber
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Fágner Henrique Heldt
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Flávio Silveira
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Micheli Filippi
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | | | - Francini Pereira da Silva
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Larissa Mallmann
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Pietra Fink
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | | | | | - Juliane Deise Fleck
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
| | - Fernando Rosado Spilki
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo Hamburgo, Rio Grande do Sul, Brazil
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10
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Gularte JS, da Silva MS, Demoliner M, Hansen AW, Heldt FH, Silveira F, Filippi M, Pereira VMDAG, da Silva FP, Mallmann L, Fink P, Laux JL, Weber MN, de Almeida PR, Fleck JD, Spilki FR. Reinfection cases by closely related SARS-CoV-2 lineages in Southern Brazil. Braz J Microbiol 2021; 52:1881-1885. [PMID: 34562232 PMCID: PMC8475897 DOI: 10.1007/s42770-021-00621-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/19/2021] [Indexed: 11/25/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the pandemic that started in late 2019 and still affects people's lives all over the world. Lack of protective immunity after primary infection has been involved with reported reinfection cases by SARS-CoV-2. In this study, we described two cases of reinfection caused by non-VOC (Variants of Concern) strains in southern Brazil, being one patient a healthcare worker. The four samples previously positive for SARS-CoV-2 by real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) were sequenced by a high-performance platform and the genomic analysis confirmed that lineages responsible for infections were B.1.91 and B.1.1.33 (patient 1), and B.1.1.33 and B.1.1.28 (patient 2). The interval between the two positive RT-qPCR for patients 1 and 2 was 45 and 61 days, respectively. This data shows that patients may be reinfected even by very closely related SARS-CoV-2 lineages.
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Affiliation(s)
- Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil.
| | - Mariana Soares da Silva
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Fágner Henrique Heldt
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Flávio Silveira
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Micheli Filippi
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Vyctoria Malayhka de Abreu Góes Pereira
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Francini Pereira da Silva
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Larissa Mallmann
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Pietra Fink
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Jéssica Luísa Laux
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Matheus Nunes Weber
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Paula Rodrigues de Almeida
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Juliane Deise Fleck
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Universidade Feevale, Rodovia ERS-239, Nº 2755, Prédio Vermelho, Piso 1, sala 103, Vila Nova, Novo Hamburgo, Rio Grande do Sul, CEP 93525-075, Brazil
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11
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da Silva MS, Demoliner M, Hansen AW, Gularte JS, Silveira F, Heldt FH, Filippi M, Pereira VMDAG, da Silva FP, Mallmann L, Fink P, da Silva LL, Weber MN, de Almeida PR, Fleck JD, Spilki FR. Early detection of SARS-CoV-2 P.1 variant in Southern Brazil and reinfection of the same patient by P.2. Rev Inst Med Trop Sao Paulo 2021; 63:e58. [PMID: 34231823 PMCID: PMC8266303 DOI: 10.1590/s1678-9946202163058] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 06/23/2021] [Indexed: 01/16/2023] Open
Abstract
Multiple variants of the Severe Acute Respiratory Syndrome coronavirus 2 virus (SARS-CoV-2) have been constantly reported across the world. The B.1.1.28 lineage has been evolving in Brazil since February 2020 and originated the P.1 variant of concern (VOC), recently named as the Gamma variant by the newly WHO nomenclature proposal, and P.2 as a variant of interest (VOI). Here we describe an early case of P.1 primary infection in Southern Brazil in late November 2020, soon after the emergence of the variant in Manaus, Northern Brazil. The same male patient was reinfected by another B.1.1.28 variant, namely P.2, in March, 2021. The genomic analysis confirmed genetically significant differences between the two viruses recovered in both infections, the P.1 lineage in the first episode and P.2 in the reinfection. Due the very early detection of P.1, we have also investigated the circulation of P.1 in the same region by differential RT-qPCR, showing that this was an isolated case of P.1 at the time of detection, and this variant has disseminated and became prominent from late January to the end of March, 2021. SARS-CoV-2 recent reports of reinfection have raised critical questions on whether and how well a first infection protects against reinfection.
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Affiliation(s)
- Mariana Soares da Silva
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Meriane Demoliner
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Alana Witt Hansen
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Juliana Schons Gularte
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Flávio Silveira
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Fágner Henrique Heldt
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Micheli Filippi
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | | | - Francini Pereira da Silva
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Larissa Mallmann
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Pietra Fink
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | | | - Matheus Nunes Weber
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | | | - Juliane Deise Fleck
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
| | - Fernando Rosado Spilki
- Universidade Feevale, Laboratório de Microbiologia Molecular, Novo
Hamburgo, Rio Grande do Sul, Brazil
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12
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Eisen AKA, Gularte JS, Demoliner M, de Abreu Goés Pereira VM, Heldt FH, Filippi M, de Almeida PR, Hansen AW, Fleck JD, Spilki FR. Low circulation of Influenza A and coinfection with SARS-CoV-2 among other respiratory viruses during the COVID-19 pandemic in a region of southern Brazil. J Med Virol 2021; 93:4392-4398. [PMID: 33829531 PMCID: PMC8250881 DOI: 10.1002/jmv.26975] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/10/2021] [Accepted: 03/26/2021] [Indexed: 12/19/2022]
Abstract
With the arrival of coronavirus disease 2019 (COVID-19) in Brazil in February 2020, several preventive measures were taken by the population aiming to avoid severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection including the use of masks, social distancing, and frequent hand washing then, these measures may have contributed to preventing infection also by other respiratory viruses. Our goal was to determine the frequencies of Influenza A and B viruses (FLUAV/FLUBV), human mastadenovirus C (HAdV-C), Enterovirus 68 (EV-68), and rhinovirus (RV) besides SARS-CoV-2 among hospitalized patients suspect of COVID-19 with cases of acute respiratory disease syndrome (ARDS) in the period of March to December 2020 and to detect possible coinfections among them. Nucleic acid detection was performed using reverse-transcription quantitative polymerase chain reaction (RT-qPCR) in respiratory samples using naso-oropharyngeal swabs and bronchoalveolar lavage. A total of 418 samples of the 987 analyzed (42.3%) were positive for SARS-CoV-2, 16 (1.62%) samples were positive for FLUAV, no sample was positive for FLUBV or EV-68, 67 (6.78%) samples were positive for HAdV-C, 55 samples were positive for RV 1/2 (26.3%) and 37 for RV 2/2 (13.6%). Coinfections were also detected, including a triple coinfection with SARS-CoV-2, FLUAV, and HAdV-C. In the present work, a very low frequency of FLUV was reported among hospitalized patients with ARDS compared to the past years, probably due to preventive measures taken to avoid COVID-19 and the high influenza vaccination coverage in the region in which this study was performed.
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Affiliation(s)
- Ana Karolina Antunes Eisen
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Juliana Schons Gularte
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Meriane Demoliner
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | | | - Fágner Henrique Heldt
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Micheli Filippi
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Paula Rodrigues de Almeida
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Juliane Deise Fleck
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Instituto de Ciências da SaúdeUniversidade FeevaleNovo HamburgoRio Grande do SulBrazil
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13
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Franceschi VB, Caldana GD, de Menezes Mayer A, Cybis GB, Neves CAM, Ferrareze PAG, Demoliner M, de Almeida PR, Gularte JS, Hansen AW, Weber MN, Fleck JD, Zimerman RA, Kmetzsch L, Spilki FR, Thompson CE. Genomic epidemiology of SARS-CoV-2 in Esteio, Rio Grande do Sul, Brazil. BMC Genomics 2021; 22:371. [PMID: 34016042 PMCID: PMC8136996 DOI: 10.1186/s12864-021-07708-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/11/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Brazil is the third country most affected by Coronavirus disease-2019 (COVID-19), but viral evolution in municipality resolution is still poorly understood in Brazil and it is crucial to understand the epidemiology of viral spread. We aimed to track molecular evolution and spread of Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Esteio (Southern Brazil) using phylogenetics and phylodynamics inferences from 21 new genomes in global and regional context. Importantly, the case fatality rate (CFR) in Esteio (3.26%) is slightly higher compared to the Rio Grande do Sul (RS) state (2.56%) and the entire Brazil (2.74%). RESULTS We provided a comprehensive view of mutations from a representative sampling from May to October 2020, highlighting two frequent mutations in spike glycoprotein (D614G and V1176F), an emergent mutation (E484K) in spike Receptor Binding Domain (RBD) characteristic of the B.1.351 and P.1 lineages, and the adjacent replacement of 2 amino acids in Nucleocapsid phosphoprotein (R203K and G204R). E484K was found in two genomes from mid-October, which is the earliest description of this mutation in Southern Brazil. Lineages containing this substitution must be subject of intense surveillance due to its association with immune evasion. We also found two epidemiologically-related clusters, including one from patients of the same neighborhood. Phylogenetics and phylodynamics analysis demonstrates multiple introductions of the Brazilian most prevalent lineages (B.1.1.33 and B.1.1.248) and the establishment of Brazilian lineages ignited from the Southeast to other Brazilian regions. CONCLUSIONS Our data show the value of correlating clinical, epidemiological and genomic information for the understanding of viral evolution and its spatial distribution over time. This is of paramount importance to better inform policy making strategies to fight COVID-19.
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Affiliation(s)
- Vinícius Bonetti Franceschi
- Center of Biotechnology, Graduate Program in Cell and Molecular Biology (PPGBCM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Gabriel Dickin Caldana
- Graduate Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Amanda de Menezes Mayer
- Center of Biotechnology, Graduate Program in Cell and Molecular Biology (PPGBCM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Gabriela Bettella Cybis
- Department of Statistics, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Carla Andretta Moreira Neves
- Graduate Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Patrícia Aline Gröhs Ferrareze
- Graduate Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Meriane Demoliner
- Molecular Microbiology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | | | | | - Alana Witt Hansen
- Molecular Microbiology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Matheus Nunes Weber
- Molecular Microbiology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Juliane Deise Fleck
- Molecular Microbiology Laboratory, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | | | - Lívia Kmetzsch
- Center of Biotechnology, Graduate Program in Cell and Molecular Biology (PPGBCM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | | | - Claudia Elizabeth Thompson
- Center of Biotechnology, Graduate Program in Cell and Molecular Biology (PPGBCM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. .,Graduate Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil. .,Department of Pharmacosciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), 245/200C Sarmento Leite St, Porto Alegre, RS, 90050-170, Brazil.
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14
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Mallmann L, Hermann BS, Schallenberger K, Demoliner M, Eisen AKA, Heldt FH, Gularte JS, Hansen AW, de Almeida PR, Weber MN, Spilki FR, Fleck JD. Proteinase K treatment in absence of RNA isolation classical procedures is a quick and cheaper alternative for SARS-CoV-2 molecular detection. J Virol Methods 2021; 293:114131. [PMID: 33798606 PMCID: PMC8008826 DOI: 10.1016/j.jviromet.2021.114131] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 11/22/2022]
Abstract
The World Health Organization (WHO) has declared a pandemic of COVID-19, the disease caused by the recently described SARS-CoV-2. The relevance and importance of mass diagnosis in order to find the asymptomatic individuals is widely recognized as a mandatory tool to reinforce the control measures for monitoring virus circulation and reduce the spreading of SARS-CoV-2. Here, we described quickness and cheaper strategies of direct RT-qPCR (in the absence of RNA isolation) and compared the results to those obtained using standard RNA isolation procedure. The tests varied using pure, diluted samples, combined with Proteinase K (PK) or Lysis Buffer. Our findings showed consistently that PK pre-treated samples in the absence of RNA extraction procedures presents similar results to those obtained by standard RNA isolation procedures. On average, 16 samples extracted with the MagMAX™ CORE Kit, take around 2 h, costing an average of USD 5, the pre-treatment of samples using PK, on the other hand, would cut the value to less than USD 0.30 and reduce the time of procedure in more than 1 ½ hours. The present study suggests the use of PK treatment instead of RNA isolation in order to reduce costs and time in processing samples for molecular diagnosis of SARS-CoV-2.
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Affiliation(s)
- L Mallmann
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - B S Hermann
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - K Schallenberger
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - M Demoliner
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - A K A Eisen
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - F H Heldt
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - J S Gularte
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - A W Hansen
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - P R de Almeida
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - M N Weber
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - F R Spilki
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - J D Fleck
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil.
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15
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Francisco RDS, Benites LF, Lamarca AP, de Almeida LGP, Hansen AW, Gularte JS, Demoliner M, Gerber AL, de C Guimarães AP, Antunes AKE, Heldt FH, Mallmann L, Hermann B, Ziulkoski AL, Goes V, Schallenberger K, Fillipi M, Pereira F, Weber MN, de Almeida PR, Fleck JD, Vasconcelos ATR, Spilki FR. Pervasive transmission of E484K and emergence of VUI-NP13L with evidence of SARS-CoV-2 co-infection events by two different lineages in Rio Grande do Sul, Brazil. Virus Res 2021; 296:198345. [PMID: 33631222 PMCID: PMC7898980 DOI: 10.1016/j.virusres.2021.198345] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 12/24/2022]
Abstract
Emergence of novel SARS-CoV-2 lineages are under the spotlight of the media, scientific community and governments. Recent reports of novel variants in the United Kingdom, South Africa and Brazil (B.1.1.28-E484K) have raised intense interest because of a possible higher transmission rate or resistance to the novel vaccines. Nevertheless, the spread of B.1.1.28 (E484K) and other variants in Brazil is still unknown. In this work, we investigated the population structure and genomic complexity of SARS-CoV-2 in Rio Grande do Sul, the southernmost state in Brazil. Most samples sequenced belonged to the B.1.1.28 (E484K) lineage, demonstrating its widespread dispersion. We were the first to identify two independent events of co-infection caused by the occurrence of B.1.1.28 (E484K) with either B.1.1.248 or B.1.91 lineages. Also, clustering analysis revealed the occurrence of a novel cluster of samples circulating in the state (named VUI-NP13L) characterized by 12 lineage-defining mutations. In light of the evidence for E484K dispersion, co-infection and emergence of VUI-NP13 L in Rio Grande do Sul, we reaffirm the importance of establishing strict and effective social distancing measures to counter the spread of potentially more hazardous SARS-CoV-2 strains.
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Affiliation(s)
| | - L Felipe Benites
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Alessandra P Lamarca
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica, Petrópolis, Brazil
| | - Luiz G P de Almeida
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica, Petrópolis, Brazil
| | - Alana Witt Hansen
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | | | - Meriane Demoliner
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Alexandra L Gerber
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica, Petrópolis, Brazil
| | - Ana Paula de C Guimarães
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica, Petrópolis, Brazil
| | | | - Fagner Henrique Heldt
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Larissa Mallmann
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Bruna Hermann
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Ana Luiza Ziulkoski
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Vyctoria Goes
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | | | - Micheli Fillipi
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Francini Pereira
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Matheus Nunes Weber
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | | | - Juliane Deise Fleck
- Laboratório de Microbiologia Molecular,Universidade Feevale, Rio Grande do Sul, Brazil
| | - Ana Tereza R Vasconcelos
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica, Petrópolis, Brazil.
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16
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Hansen É, Monteiro de Aquim P, Hansen AW, Cardoso JK, Ziulkoski AL, Gutterres M. Impact of post-tanning chemicals on the pollution load of tannery wastewater. J Environ Manage 2020; 269:110787. [PMID: 32430280 DOI: 10.1016/j.jenvman.2020.110787] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/29/2020] [Accepted: 05/13/2020] [Indexed: 05/09/2023]
Abstract
The leather industry uses a large amount of chemicals to transform a raw hide into finished leather. Chemicals are not fully taken up by leather and thus end up in tannery wastewater. Physicochemical and toxicological characterization of tannery effluents has been widely assessed. However, the characterization of processing chemicals and their relation to the pollution load of effluents remains unknown. Thus, this study aimed to assess a physicochemical and cytotoxic characterization of chemicals used in the leather post-tanning process and to evaluate the contribution of each chemical to the pollution load of raw wastewater. This study was performed using a leather post-tanning formulation applied by a large tannery located in Brazil. Deacidulation agents caused high conductivity and dissolved solids in wastewater. Retanning agents (natural and synthetic tannins) were responsible for the largest inorganic pollution load, and synthetic tannins were more toxic than natural ones. Fatliquoring agents released the highest chemical oxygen demand load in wastewater and they were the chemical group that presented the highest toxicity. Fixing agent and black dye provided inorganic pollution load to wastewater, and nitrogen pollution of wastewater was mainly related to the neutralizing retanner and the black dye.
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Affiliation(s)
- Éverton Hansen
- Federal University of Rio Grande do Sul - UFRGS, Post-graduation Program of Chemical Engineering, Laboratory for Leather and Environmental Studies -LACOURO, Rua Eng. Luiz Englert, s/n°, Porto Alegre, RS, Brazil; Centro Universitário Ritter dos Reis - UniRitter, 555 Orfanotrófio - Alto Teresópolis, Porto Alegre, RS, Brazil; Feevale University, 2755, RS 239, Vila Nova, Novo Hamburgo, RS, Brazil.
| | | | - Alana Witt Hansen
- Feevale University, 2755, RS 239, Vila Nova, Novo Hamburgo, RS, Brazil
| | | | | | - Mariliz Gutterres
- Federal University of Rio Grande do Sul - UFRGS, Post-graduation Program of Chemical Engineering, Laboratory for Leather and Environmental Studies -LACOURO, Rua Eng. Luiz Englert, s/n°, Porto Alegre, RS, Brazil
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17
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Bandiera S, Almeida FB, Hansen AW, Pulcinelli RR, Caletti G, de Paula LF, Nin MS, Fontella FU, Almeida RF, Tannhauser Barros HM, Gomez R. Combined use of alcohol and cigarette increases locomotion and glutamate levels in the cerebrospinal fluid without changes on GABAA or NMDA receptor subunit mRNA expression in the hippocampus of rats. Behav Brain Res 2020; 380:112444. [DOI: 10.1016/j.bbr.2019.112444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 11/18/2019] [Accepted: 12/18/2019] [Indexed: 10/25/2022]
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18
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Hansen AW, Almeida FB, Bandiera S, Pulcinelli RR, Caletti G, Agnes G, Fernandes de Paula L, Nietiedt NA, Nin MS, Tannhauser Barros HM, Gomez R. Correlations between subunits of GABA A and NMDA receptors after chronic alcohol treatment or withdrawal, and the effect of taurine in the hippocampus of rats. Alcohol 2020; 82:63-70. [PMID: 31473305 DOI: 10.1016/j.alcohol.2019.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 08/15/2019] [Accepted: 08/19/2019] [Indexed: 11/18/2022]
Abstract
Chronic use of alcohol and its withdrawal impairs the delicate balance between GABAergic and glutamatergic systems. This imbalance includes changes in GABA receptors - importantly in GABAA subtypes - and glutamate receptors, especially in NMDA subtypes. A better comprehension of the different roles of GABAAR and NMDAR subunits could be helpful to define new strategies to counteract the deleterious effects observed during alcohol withdrawal. Taurine, a sulfonated amino acid, has been proposed to attenuate alcohol withdrawal symptoms due to its neuromodulatory properties. In this study, we evaluated the correlations between GABAAR and NMDAR subunits in the hippocampus of rats chronically treated with alcohol or in alcohol withdrawal, and the effects of taurine treatment on these parameters. Male Wistar rats received alcohol (2 g/kg) or water by oral gavage (control), 2 × /day, for 28 days. From day 29 to day 33, withdrawal rats received water instead of alcohol and all groups were reallocated to receive 100 mg/kg taurine or saline intraperitoneally (i.p.), once a day. On day 34, rats were euthanized and the hippocampus was dissected for GABAAR α1, α4, δ, and γ2 and NMDAR GluN2A and GluN2B subunits mRNA expression determination by RT qPCR. There were no differences between groups in the studied GABAAR and NMDA subunits. However, we observed a correlation of α1 and γ2 subunits induced by taurine, while in the alcohol group there was a correlation between α4 and GluN2A. In the group treated with alcohol and taurine, we observed an extra correlation, between α1 and GluN2A. After 5 days of withdrawal, a correlation observed in the control group, between δ and GluN2A, was reestablished. The correlation found between subunits suggests a neuroadaptation of GABAergic and glutamatergic systems in withdrawal rats. Results from this study contribute to the elucidation of the mechanisms beyond neuroadaptations observed in alcohol use and withdrawal.
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Affiliation(s)
- Alana Witt Hansen
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil.
| | - Felipe Borges Almeida
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA, Sarmento Leite, 245, 90050-170, Porto Alegre, RS, Brazil
| | - Solange Bandiera
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Rianne Remus Pulcinelli
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Greice Caletti
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Grasiela Agnes
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA, Sarmento Leite, 245, 90050-170, Porto Alegre, RS, Brazil
| | - Leonardo Fernandes de Paula
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Natália Azuaga Nietiedt
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Maurício Schüler Nin
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil; Centro Universitário Metodista do IPA, Cel. Joaquim Pedro Salgado, 80, 90420-060, Porto Alegre, RS, Brazil
| | - Helena Maria Tannhauser Barros
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA, Sarmento Leite, 245, 90050-170, Porto Alegre, RS, Brazil
| | - Rosane Gomez
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Laboratório de Álcool e Tabaco (LAT), Universidade Federal do Rio Grande do Sul - UFRGS, Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA, Sarmento Leite, 245, 90050-170, Porto Alegre, RS, Brazil
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19
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Zepon ΚM, Marques MS, Hansen AW, Pucci CDAF, Morisso FDP, Ziulkoski AL, do Nascimento JHO, Magnago RF, Κanis LA. Polymer-based wafers containing in situ synthesized gold nanoparticles as a potential wound-dressing material. Mater Sci Eng C Mater Biol Appl 2020; 109:110630. [PMID: 32228905 DOI: 10.1016/j.msec.2020.110630] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 11/19/2019] [Accepted: 01/02/2020] [Indexed: 12/19/2022]
Abstract
Polymer-based wafers containing gold nanoparticles (AuNP) were prepared using κ-carrageenan (κC), locust bean gum (LBG) and polyvinyl alcohol (PVA) at ratios of 42/22/13% w/w and 35/15/17% w/w. The synthesized AuNPs were evaluated for their particle size and morphology. The produced wafers containing AuNPs were investigated for their physicochemical, morphological, mechanical, and swelling properties. In addition, bacterial barrier activity and in vitro cytotoxicity were also evaluated in this study. The AuNPs obtained were spherical in shape (~ 10-15 nm in diameter) and exhibited a single bell-shaped UV-vis absorption band centered ~ 540 nm. FT-IR spectra of the wafers containing AuNPs exhibited a shift of ν(O=S=O) absorption band toward a lower wavenumber and a shift of ν(OH) absorption band toward a higher wavenumber due to the coordination of OH groups to AuNPs and their interaction with O=S=O groups of κC, respectively. SEM images confirmed the porous structure of the produced wafers, being the surface area, mechanical properties, and swelling behavior directly affected by changing both the initial amount of [Au+3] and the composition of the wafers. Lastly, the produced wafers showed non-toxicity to NIH-3T3 fibroblast cells, and they also serve as a bacterial barrier. These findings endorsed the claim that the produced wafers containing AuNPs could be a promising material for wound dressing applications.
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Affiliation(s)
- Κarine Modolon Zepon
- Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, 88701-000 Tubarão, SC, Brazil; Pós-Graduação em Tecnologia de Materiais e Processos Industriais, Universidade Feevale, 93525-075 Novo Hamburgo, RS, Brazil.
| | - Morgana Souza Marques
- Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, 88701-000 Tubarão, SC, Brazil; Pós-Graduação em Tecnologia de Materiais e Processos Industriais, Universidade Feevale, 93525-075 Novo Hamburgo, RS, Brazil.
| | - Alana Witt Hansen
- Laboratório de Citotoxicidade, Instituto de Ciências da Saúde, Universidade Feevale, 93525-075 Novo Hamburgo, RS, Brazil
| | | | - Fernando Dal Pont Morisso
- Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Ana Luiza Ziulkoski
- Laboratório de Citotoxicidade, Instituto de Ciências da Saúde, Universidade Feevale, 93525-075 Novo Hamburgo, RS, Brazil
| | | | - Rachel Faverzani Magnago
- Pós-Graduação em Engenharia Têxtil, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, Brazil
| | - Luiz Alberto Κanis
- Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, 88701-000 Tubarão, SC, Brazil
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20
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A. Quinteros D, Witt Hansen A, Bellaver B, Bobermin LD, R. Pulcinelli R, Bandiera S, Caletti G, Bitencourt PER, Quincozes-Santos A, Gomez R. Combined Exposure to Alcohol and Tobacco Smoke Changes Oxidative, Inflammatory, and Neurotrophic Parameters in Different Areas of the Brains of Rats. ACS Chem Neurosci 2019; 10:1336-1346. [PMID: 30653286 DOI: 10.1021/acschemneuro.8b00412] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Devastating effects of exposure to alcohol and tobacco smoke on health are extensively reported in the literature. However, few studies have attempted to elucidate the consequences of their combined use on the central nervous system. Here we studied the effect of this combined use on some oxidative, inflammatory, and neurotrophic parameters in the hippocampus, striatum, and frontal cortex of rats. Adult Wistar rats were allocated into control (CT), alcohol (AL), tobacco smoke (TB), or combined (ALTB) groups. Rats were exposed to environmental air (CT and AL groups) or to the smoke from six cigarettes (TB and ALTB groups) immediately after tap water (CT and TB) or 2 g of alcohol/kg (AL and ALTB) oral gavage administration, twice a day, for 4 weeks. On day 28, rats were euthanized and areas of the brain were dissected to evaluate some cellular redox parameters, pro-inflammatory cytokine levels, and brain-derived neurotrophic factor (BDNF) levels. A one-way analysis of variance showed that the ALTB combined treatment significantly increased oxidative stress levels in the hippocampus. ALTB also increased interleukin-1β levels in the striatum and frontal cortex and tumoral necrosis factor-α levels in the frontal cortex compared with those of AL, TB, and CT rats. Combined treatment also decreased the BDNF levels in the frontal cortex of rats. Oxidative damage was found, more importantly, in the hippocampus, and inflammatory parameters were extended to all areas of the brain that were studied. Our results showed an interaction between alcohol and tobacco smoke according to the area of the brain, suggesting an additional risk of neural damage in alcoholics who smoke.
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Affiliation(s)
- Dayane A. Quinteros
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
| | - Alana Witt Hansen
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
| | - Bruna Bellaver
- Programa de Pós-Graduação em Ciência Biológicas: Bioquímica, UFRGS, Porto Alegre 90050-170, Brazil
| | - Larissa D. Bobermin
- Programa de Pós-Graduação em Ciência Biológicas: Bioquímica, UFRGS, Porto Alegre 90050-170, Brazil
| | - Rianne R. Pulcinelli
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
| | - Solange Bandiera
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
| | - Greice Caletti
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
| | - Paula E. R. Bitencourt
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
| | - André Quincozes-Santos
- Programa de Pós-Graduação em Ciência Biológicas: Bioquímica, UFRGS, Porto Alegre 90050-170, Brazil
| | - Rosane Gomez
- Programa de Pós-Graduação em Ciência Biológicas: Farmacologia e Terapêutica (PPGFT), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90040-060, Brazil
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21
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Freese L, Almeida FB, Heidrich N, Hansen AW, Steffens L, Steinmetz A, Moura DJ, Gomez R, Barros HMT. Environmental enrichment reduces cocaine neurotoxicity during cocaine-conditioned place preference in male rats. Pharmacol Biochem Behav 2018; 169:10-15. [DOI: 10.1016/j.pbb.2018.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 02/06/2023]
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22
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Gomez R, Caletti G, Arbo BD, Hoefel AL, Schneider R, Hansen AW, Pulcinelli RR, Freese L, Bandiera S, Kucharski LC, Barros HMT. Acute intraperitoneal administration of taurine decreases the glycemia and reduces food intake in type 1 diabetic rats. Biomed Pharmacother 2018; 103:1028-1034. [PMID: 29710660 DOI: 10.1016/j.biopha.2018.04.131] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/17/2018] [Accepted: 04/17/2018] [Indexed: 10/17/2022] Open
Abstract
Taurine, an amino acid with antioxidant and osmoregulatory properties, has been studied for its possible antidiabetic properties in type 1 and type 2 diabetic animals. In type 2 diabetic mice, taurine decreases blood glucose through increased insulin secretion and insulin receptor sensitization. However, insulin is absent in type 1 diabetic individuals. The aim of this study was to evaluate the effects of taurine on parameters related to the energy balance that could explain the metabolic action of this amino acid in type 1 diabetic rats. Control and streptozotocin-induced diabetic rats received saline or taurine (100 mg/kg/day), intraperitoneally, for 30 days. Parameters such as palatable food intake, gastrointestinal transit rate, serum glucose, insulin, leptin, and glucagon levels were measured 60 min after the last taurine administration. Liver, kidneys, heart, and retroperitoneal fat were dissected and weighted. Glycogen levels were measured in the liver and soleus muscle. Our results showed that acute taurine administration decreased glycemia. It also decreased food intake in diabetic rats, without affecting other metabolic parameters. Altogether, our results suggest that in type 1 diabetic rats, taurine decreases blood glucose by a non-insulin-dependent mechanism. Due to the safety profile of taurine, and its effect on glycemia, this amino acid may help to design new drugs to add benefit to insulin therapy in type 1 diabetic individuals.
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Affiliation(s)
- Rosane Gomez
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil; Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil.
| | - Greice Caletti
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
| | - Bruno Dutra Arbo
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Brazil
| | - Ana Lúcia Hoefel
- Programa de Pós-Graduação em Fisiologia, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Ricardo Schneider
- Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Alana Witt Hansen
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Rianne Remus Pulcinelli
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Luana Freese
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
| | - Solange Bandiera
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Luiz Carlos Kucharski
- Programa de Pós-Graduação em Fisiologia, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Helena Maria Tanhauser Barros
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
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Geels C, Christensen JH, Hansen AW, Heinemeier J, Kiilsholm S, Larsen NW, Larsen SE, Pedersen T, Sørensen LL, Brandt J, Frohn LM, Djurhuus S. Identifying the European fossil fuel plumes in the atmosphere over the Northeast Atlantic Region through isotopic observations and numerical modelling. Environ Monit Assess 2006; 117:387-409. [PMID: 16917720 DOI: 10.1007/s10661-006-0775-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2004] [Accepted: 07/05/2005] [Indexed: 05/11/2023]
Abstract
As part of the Danish NEAREX project the origin and variability of anthropogenic atmospheric CO(2) over the Northeast Atlantic Region (NEAR) has been studied. The project consisted of a combination of experimental and modelling activities. Local volunteers operated CO(2) sampling stations, built at University of Copenhagen, for (14)C analysis at four locations (East Denmark, Shetland Isles, Faroe Isles and Iceland). The samples were only collected during winter periods of south-easterly winds in an attempt to trace air enriched in fossil-fuel derived CO(2) due to combustion of fossil fuels within European countries. In order to study the transport and concentration fields over the region in detail, a three-dimensional Eulerian hemispheric air pollution model has been extended to include the main anthropogenic sources for atmospheric CO(2). During the project period (1998-2001) only a few episodes of transport from Central Europe towards NEAR arose, which makes the data set for the evaluation of the method sparse. The analysed samples indicate that the signal for fossil CO(2), as expected, is largest (up to 3.7+/-0.4% fossil CO(2)) at the Danish location closest to the European emissions areas and much weaker (up to approximately 1.5+/-0.6% fossil CO(2)) at the most remote location. As the anthropogenic signal is weak in the clean atmosphere over NEAR these numbers will, however, be very sensitive to the assumed background (14)CO(2) activity and the precision of the measurements. The model simulations include the interplay between the driving processes from the emission into the boundary layer and the following horizontal/vertical mixing and atmospheric transport and are used to analyse the meteorological conditions leading to the observed events of high fossil CO(2) over NEAR. This information about the history of the air masses is essential if an observed signal is to be utilised for identifying and quantifying sources for fossil CO(2).
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Affiliation(s)
- C Geels
- Department of Atmospheric Environment, National Environmental Research Institute, Denmark.
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24
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Abstract
A Monte Carlo inverse method has been used on the temperature profiles measured down through the Greenland Ice Core Project (GRIP) borehole, at the summit of the Greenland Ice Sheet, and the Dye 3 borehole 865 kilometers farther south. The result is a 50, 000-year-long temperature history at GRIP and a 7000-year history at Dye 3. The Last Glacial Maximum, the Climatic Optimum, the Medieval Warmth, the Little Ice Age, and a warm period at 1930 A.D. are resolved from the GRIP reconstruction with the amplitudes -23 kelvin, +2.5 kelvin, +1 kelvin, -1 kelvin, and +0.5 kelvin, respectively. The Dye 3 temperature is similar to the GRIP history but has an amplitude 1.5 times larger, indicating higher climatic variability there. The calculated terrestrial heat flow density from the GRIP inversion is 51.3 milliwatts per square meter.
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Affiliation(s)
- D Dahl-Jensen
- D. Dahl-Jensen, K. Mosegaard, N. Gundestrup, S. J. Johnsen, A. W. Hansen, Niels Bohr Institute for Astronomy, Physics and Geophysics, Department of Geophysics, Juliane Maries Vej 30, DK-2100 Copenhagen OE, Denmark. G. D. Clow, USGS-Climate Program
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25
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Hansen AW, Edal AL, Wermuth L. [Hemorrhage in cerebral cavernous hemangioma as a cause of hemiballismus]. Ugeskr Laeger 1995; 157:3483-5. [PMID: 7792978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A 19 year old righthanded woman, without previous neurological symptoms, was examined in April 1993, because of involuntary movements affecting especially the right hand, but also her right leg and the right side of her face. Magnetic Resonance Imagning (MRI), showed a process located in the area of the left subthalamic nucleus, which was recognized as a cavernous haemangioma. A left carotic arteriography in August was normal. The patient had a complete regression of her symptoms, wherefore there was no indication for neurosurgical intervention. The patient is still being followed without treatment.
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Affiliation(s)
- A W Hansen
- Neuromedicinsk afdeling N, Odense Universitetshospital
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26
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Olsen NK, Hansen AW, Nørby S, Edal AL, Jørgensen JR, Rosenberg T. Leber's hereditary optic neuropathy associated with a disorder indistinguishable from multiple sclerosis in a male harbouring the mitochondrial DNA 11778 mutation. Acta Neurol Scand 1995; 91:326-9. [PMID: 7639060 DOI: 10.1111/j.1600-0404.1995.tb07016.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This report describes a multiple sclerosis (MS)-like disorder in a male patient with Leber's hereditary optic neuropathy (LHON) harbouring the mitochondrial DNA 11778 base pair mutation. Given the population frequencies of MS and LHON, coincidental occurrence is unlikely. Hypothetically the mitochondrial mutation underlying LHON may contribute to presumably immunologically mediated involvement of other myelinated axons in the central nervous system in susceptible individuals, producing a disorder indistinguishable from MS. We recommend that investigation for oligoclonal bands in CSF, evoked potentials and MR brain scan in these patients be supplemented with mitochondrial DNA analysis.
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Affiliation(s)
- N K Olsen
- Department of Neurology, Odense University Hospital, Denmark
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