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Dos Santos DL, Chaúque BJM, Matiazo FF, de Miranda Ribeiro L, Rott MB. Agar dehydration: a simple method for long-term storage of Acanthamoeba spp. collection at room temperature. Parasitol Res 2024; 123:153. [PMID: 38446221 DOI: 10.1007/s00436-024-08172-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 02/26/2024] [Indexed: 03/07/2024]
Abstract
This study describes dehydration of agar containing cysts as a novel and inexpensive method for long-term storage of Acanthamoeba spp. collections at room temperature. Five hundred microliters of axenically cultured Acanthamoeba spp. trophozoites (106 cells/mL) in PYG media or 150 µl of amoeba suspension (106 cells or cysts/mL) from monoxenic plate culture was spread onto the surface of non-nutritive agar (NNA, 2-3-mm thick) without or with a layer of heat-inactivated Escherichia coli, respectively. The plates were sealed and incubated at 30 °C. After the encystment, the Parafilm® was removed, and the plates were kept at the same temperature until the NNA was completely dehydrated. The dehydrated cyst-containing NNA was cut in rectangles and stored in airtight tubes at room temperature for up to 3 years. Cyst viability was assessed by inoculating them in fresh NNA with a layer of E. coli and in PYG followed by incubation at 30 °C. One hundred percent of samples from all specimens (19) stored over the 3 years allowed new cultures to be re-established; however, two strains showed reduced viability, at 66.7% and 62.5%, after 2 years of room temperature storage. One hundred percent of the cyst samples produced axenically and maintained in dry NNA allowed the re-establishment of axenic cultures through direct incubation in PYG, with excystment occurring within 24 or 48 h. For the first time, we report the dehydration of cyst-containing agar as an economical and effective method for the long-term storage of Acanthamoeba spp. collections at room temperature. It enables the creation of large collections using reduced space and economical transport of Acanthamoeba strains, in addition to allowing better organization of the collection.
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Affiliation(s)
- Denise Leal Dos Santos
- Laboratory 520, Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande Do Sul, 90035-002, Brazil
- Postdoctoral Fellow at Master's Program in Clinical Research (MPPC) at the Hospital de Clínicas de Porto Alegre (HCPA) (CAPES Pilot Program), Rio Grande Do Sul, Brazil
| | - Beni Jequicene Mussengue Chaúque
- Laboratory 520, Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande Do Sul, 90035-002, Brazil
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Rio Grande Do Sul, Brazil
- Center of Studies in Science and Technology (NECET), Biology Course, Universidade Rovuma, Niassa Branch, Lichinga, Mozambique
| | - Fernanda Fraga Matiazo
- Laboratory 520, Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande Do Sul, 90035-002, Brazil
| | - Larissa de Miranda Ribeiro
- Laboratory 520, Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande Do Sul, 90035-002, Brazil
| | - Marilise Brittes Rott
- Laboratory 520, Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande Do Sul, 90035-002, Brazil.
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Chaúque BJM, da Silva TCB, Dos Santos DL, Benitez GB, Chaúque LGH, Benetti AD, Zanette RA, Rott MB. Global prevalence of free-living amoebae in solid matrices - A systematic review with meta-analysis. Acta Trop 2023; 247:107006. [PMID: 37633571 DOI: 10.1016/j.actatropica.2023.107006] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 08/28/2023]
Abstract
The ubiquitous free-living amoebae (FLA) are microorganisms of significant medical, sanitary, and ecological importance. However, their characterization within solid matrices such as soil, dust, sediment, mud, sludge, and compost remain to be systematized. In this study, we conducted a systematic review with meta-analysis to explore the global distribution of FLA in solid matrices. From the analysis of 104 out of 4,414 scientific articles retrieved from different databases, it was found that the general global prevalence of FLA in solid matrices was of 55.13% (95% confidence interval (CI) 49.32-60.94). Specifically, FLA prevalence was high in soil (72.40%, 95% CI 69.08-75.73), sediment (57.91%, 95% CI 50.01-65.81), mud (52.90%, 95% CI 24.01-81.78), dust (48.60%, 95% CI 43.00-54.19), and sewage sludge (40.19%, 95% CI 30.68-49.70). In aerosols it was comparatively lower (17.21%, 95% CI 12.76-21.66). Acanthamoeba spp. (52.23%) and Hartmanella/Vermamoeba spp. (36.06%) were found to be more prevalent, whereas Naegleria spp. (34.98%) and Balamuthia spp. (27.32%) were less prevalent. The distribution of the highest global prevalence values for species of Acanthamoeba spp., considering different publication periods of the studies, is as follows: A. hatchetti (51.46%), A. rhysodes (47.49%), A. polyphaga (36.37%), A. culbertsoni (34.31%), A. castellanii (34.21%), and A. lenticulata (32.82%). For other FLA species, the distribution is: Hartmannella/Vermamoeba vermiformis (91.57%), Naegleria fowleri (42.32%), Naegleria gruberi (32.39%), and Balamuthia mandrillaris (25%). The most prevalent Acanthamoeba genotypes were T4 (33.38%) and T3 (23.94%). Overall, the global prevalence of FLA in solid matrices is as high as or greater than that reported in water by previous systematic reviews. Thus, actions aimed at reducing exposure to FLA or exploring their ecological dynamics should consider not only water but also the various solid matrices. The finding outlined here can provide valuable insights for such actions, e.g., informing on the level of exposure to FLA, or on the microbial biodiversity of specific environmental compartments.
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Affiliation(s)
- Beni Jequicene Mussengue Chaúque
- Graduate Program in Agricultural and Environmental Microbiology, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Brazil; Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Rio Grande do Sul, Brazil; Center of Studies in Science and Technology (NECET), Biology Course, Universidade Rovuma, Niassa Branch, Lichinga, Mozambique
| | - Thaisla Cristiane Borella da Silva
- Graduate Program in Agricultural and Environmental Microbiology, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Brazil
| | - Denise Leal Dos Santos
- CAPES Clinical Research Pilot Program at Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
| | - Guilherme Brittes Benitez
- Industrial and Systems Engineering Graduate Program, Polytechnic School, Pontifical Catholic University of Parana (PUCPR), Brazil
| | | | | | - Régis Adriel Zanette
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Rio Grande do Sul, Brazil
| | - Marilise Brittes Rott
- Graduate Program in Agricultural and Environmental Microbiology, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Brazil.
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Marinho BTS, Santos DLD, Santos DLD, Rott MB. First report of free-living amoebae in watercourses in southern Brazil: molecular diagnosis and phylogenetic analysis of Vermamoeba vermiformis, Naegleria gruberi, and Acanthamoeba spp. J Water Health 2023; 21:972-980. [PMID: 37515566 PMCID: wh_2023_126 DOI: 10.2166/wh.2023.126] [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] [Subscribe] [Scholar Register] [Indexed: 07/31/2023]
Abstract
Free-living amoebae (FLA) are protozoa dispersed in different environments and are responsible for different infections caused to humans and other animals. Microorganisms such as Acanthamoeba spp., Vermamoeba sp., and Naegleria sp. are associated with diseases that affect the central nervous system, in addition to skin infections and keratitis, as occurs in the genus Acanthamoeba and with Vermamoeba vermiformis. Due to the concerns of these FLA in anthropogenic aquatic environments, this work aimed to identify these microorganisms present in waters of Porto Alegre, Brazil. One litre sample was collected in two watercourses during the summer of 2022 and inoculated onto non-nutrient agar plates containing heat-inactivated Escherichia coli. Polymerase chain reaction results indicated the presence of FLA of the genera Acanthamoeba, Vermamoeba, and Naegleria in the study areas. Genetic sequencing indicated the presence of V. vermiformis and Naegleria gruberi. These aquatic and anthropogenic environments can serve as a means of spread and contamination by FLA, which gives valuable information on public health in the city.
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Affiliation(s)
- Brenda Teixeira Scardini Marinho
- Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande do Sul 90035-002, Brazil E-mail:
| | - Denise Leal Dos Santos
- Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande do Sul 90035-002, Brazil
| | - Daniel Leal Dos Santos
- Faculty of Geography, Pontifical Catholic University of Rio Grande do Sul, Ipiranga Avenue, N 6681, Porto Alegre, Rio Grande do Sul 90619-900, Brazil
| | - Marilise Brittes Rott
- Protozoology Laboratory, Microbiology Immunology and Parasitology Department, Basic Health Sciences Institute, Federal University of Rio Grande do Sul, Ramiro Barcelos Street, N 2600, Porto Alegre, Rio Grande do Sul 90035-002, Brazil
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Dos Santos DL, Virginio VG, Berté FK, Lorenzatto KR, Marinho DR, Kwitko S, Locatelli CI, Freitas EC, Rott MB. Clinical and molecular diagnosis of Acanthamoeba keratitis in contact lens wearers in southern Brazil reveals the presence of an endosymbiont. Parasitol Res 2022; 121:1447-1454. [PMID: 35194678 DOI: 10.1007/s00436-022-07474-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 09/17/2021] [Accepted: 02/17/2022] [Indexed: 12/17/2022]
Abstract
Acanthamoeba keratitis (AK) is an infection that is mostly observed in contact lens wearers. It is often misdiagnosed causing delays in the administration of the correct treatment. The aim of this study was to report the outcome of clinical and molecular diagnosis of AK cases during the summer of 2019 in the southern region of Brazil. Three suspected cases of AK were discovered after an ophthalmic examination at a public hospital in the city of Porto Alegre. These cases were then confirmed through laboratory diagnosis (cell culture and molecular analysis by PCR and sequencing). In each of the three clinical sample cell cultures of corneal scraping and molecular analysis confirmed the presence of Acanthamoeba spp., all belonging to the morphological group II and to the genotype T4, which is the most common genotype associated with AK. In addition, Acanthamoeba spp. isolated from one of the clinical samples was found to harbor the Candidatus Paracaedibacter acanthamoeba, a bacterial endosymbiont. The presence of Ca. Paracaedibacter acanthamoeba in clinical isolates requires further research to reveal its possible role in the pathogenicity of Acanthamoeba infections.
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Affiliation(s)
- Denise Leal Dos Santos
- Microbiology, Immunology and Parasitology Department, Basic Health Sciences Institute, Parasitology Sector, Rio Grande Do Sul Federal University, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande Do Sul, 90050-170, Brazil
| | - Veridiana Gomes Virginio
- Microbiology, Immunology and Parasitology Department, Basic Health Sciences Institute, Parasitology Sector, Rio Grande Do Sul Federal University, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande Do Sul, 90050-170, Brazil
| | - Francisco Kercher Berté
- Microbiology, Immunology and Parasitology Department, Basic Health Sciences Institute, Parasitology Sector, Rio Grande Do Sul Federal University, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande Do Sul, 90050-170, Brazil
| | - Karina Rodrigues Lorenzatto
- Microbiology, Immunology and Parasitology Department, Basic Health Sciences Institute, Parasitology Sector, Rio Grande Do Sul Federal University, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande Do Sul, 90050-170, Brazil
| | - Diane Ruschel Marinho
- Cornea Department, Ophthalmology Service, Hospital de Clínicas de Porto Alegre Rio Grande Do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande Do Sul, 90035-903, Brazil
| | - Sergio Kwitko
- Cornea Department, Ophthalmology Service, Hospital de Clínicas de Porto Alegre Rio Grande Do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande Do Sul, 90035-903, Brazil
| | - Claudete Inês Locatelli
- Cornea Department, Ophthalmology Service, Hospital de Clínicas de Porto Alegre Rio Grande Do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande Do Sul, 90035-903, Brazil
| | - Eduarda Correa Freitas
- Cornea Department, Ophthalmology Service, Hospital de Clínicas de Porto Alegre Rio Grande Do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande Do Sul, 90035-903, Brazil
| | - Marilise Brittes Rott
- Microbiology, Immunology and Parasitology Department, Basic Health Sciences Institute, Parasitology Sector, Rio Grande Do Sul Federal University, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande Do Sul, 90050-170, Brazil.
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Henker LC, Lorenzett MP, Dos Santos DL, Virginio VG, Driemeier D, Rott MB, Pavarini SP. Naegleria fowleri-associated meningoencephalitis in a cow in Southern Brazil-first molecular detection of N. fowleri in Brazil. Parasitol Res 2021; 120:2873-2879. [PMID: 34191130 DOI: 10.1007/s00436-021-07209-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/07/2021] [Indexed: 11/24/2022]
Abstract
Naegleria fowleri, a free-living and thermophilic ameba, is the etiological agent of primary amebic meningoencephalitis (PAM). PAM is a rare and highly fatal neurologic disease in humans, and has been rarely documented in animal species. This report describes the pathological and etiological findings of a fatal case of N. fowleri-associated meningoencephalitis in a cow in Southern Brazil. Microscopic findings were consistent with severe, multifocal, hemorrhagic, and necrosuppurative meningoencephalitis associated with a large number of amebic trophozoites compatible with N. fowleri. Brain samples subjected to molecular assays generated a 315 bp fragment, which presented 99% identity with a N. fowleri sequence previously deposited in GenBank. This is the first study reporting the molecular detection of N. fowleri in a case of cattle meningoencephalitis in Latin America, and the obtained sequence represents the first GenBank deposit of N. fowleri identified in Brazil to this day. Additionally, the case reported is the second occurrence of N. fowleri-associated disease in the same city, drawing attention to the local importance of infection by this ameba and potential risk for human infections.
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Affiliation(s)
- Luan Cleber Henker
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS, 91540-000, Brazil.
| | - Marina Paula Lorenzett
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS, 91540-000, Brazil
| | - Denise Leal Dos Santos
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Setor de Parasitologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Sarmento Leite, Centro Histórico, 500, Porto Alegre, RS, 90050-170, Brazil
| | - Veridiana Gomes Virginio
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Setor de Parasitologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Sarmento Leite, Centro Histórico, 500, Porto Alegre, RS, 90050-170, Brazil
| | - David Driemeier
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS, 91540-000, Brazil
| | - Marilise Brittes Rott
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Setor de Parasitologia, Departamento de Microbiologia, Imunologia e Parasitologia, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Sarmento Leite, Centro Histórico, 500, Porto Alegre, RS, 90050-170, Brazil
| | - Saulo Petinatti Pavarini
- Setor de Patologia Veterinária, Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves, 9090, Bairro Agronomia, Porto Alegre, RS, 91540-000, Brazil
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Alves J, Da Silva FR, Kahl V, Reyes J, Lima E, Abreu MB, Thiesen FV, Dos Santos DL, Salvador M, Dos Santos Branco C, Nersesyan A, Knasmuller S, Da Silva J. Impact of nicotine-induced green tobacco sickness on DNA damage and the relation with symptoms and alterations of redox status in tobacco farmers. Ecotoxicol Environ Saf 2020; 206:111397. [PMID: 33007538 DOI: 10.1016/j.ecoenv.2020.111397] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/11/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
During the harvest period, tobacco workers are exposed to nicotine and it is known that absorption of the alkaloid via the leaves causes green tobacco sickness (GST). We investigated if GST and its symptoms are associated with DNA damage and alterations of the redox status. DNA damage was measured in lymphocytes of tobacco workers and controls (n = 40/group) in single cell gel electrophoresis assays. Exposure to nicotine was determined by plasma cotinine measurements, alterations of the redox status by quantification of the total antioxidant capacity (TEAC) and of thiobarbituric acid reactive substances (TBARS). The symptoms of GTS included nausea, abdominal cramps, headache, vomiting and dizziness, and 50% of the workers had more than one symptom. Cotinine levels were enhanced in the workers (111 ng/mL); furthermore, the extent of DNA damage was ca. 3-fold higher than in the controls. This effect was more pronounced in participants with GST compared to healthy nicotine exposed workers and increased in individuals with specific symptoms (range 22-36%). TBARS levels did not differ between workers and unexposed controls, while TEAC values were even increased (by 14.3%). Contact with nicotine present in tobacco leaves causes GTS and leads to damage of the DNA; this effect is more pronounced in workers with GTS symptoms and is associated with alterations of the redox status. Damage of the genetic material which was found in the workers may lead to adverse long-term effects that are caused by genomic instability such as cancer and accelerated ageing.
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Affiliation(s)
- Jodel Alves
- Laboratory of Genetic Toxicology, PPGBioSaúde, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Fernanda R Da Silva
- Posgraduate Program in Evaluation of Environmental Impacts, La Salle University (UniLaSalle), Canoas, RS, Brazil
| | - Vivian Kahl
- Telomere Length Regulation Unit, Children's Medical Research Institute (CMRI), Sydney, NSW, Australia
| | - Juliana Reyes
- Laboratory of Genetic Toxicology, PPGBioSaúde, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Elisiane Lima
- Laboratory of Genetic Toxicology, PPGBioSaúde, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Marina B Abreu
- Toxicology Institute, Catholic Pontificie University of Rio Grande do Sul (PUC), Porto Alegre, RS, Brazil
| | - Flávia V Thiesen
- Toxicology Institute, Catholic Pontificie University of Rio Grande do Sul (PUC), Porto Alegre, RS, Brazil
| | - Denise Leal Dos Santos
- Toxicology Institute, Catholic Pontificie University of Rio Grande do Sul (PUC), Porto Alegre, RS, Brazil
| | - Mirian Salvador
- Biotechnology Institute, University of Caxias do Sul, Caxias do Sul (UCS), RS, Brazil; Mestrado em Avaliação de Impactos Ambientais, Canoas, RS, Brazil
| | - Cátia Dos Santos Branco
- Biotechnology Institute, University of Caxias do Sul, Caxias do Sul (UCS), RS, Brazil; Mestrado em Avaliação de Impactos Ambientais, Canoas, RS, Brazil
| | - Armen Nersesyan
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - Siegfried Knasmuller
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - Juliana Da Silva
- Laboratory of Genetic Toxicology, PPGBioSaúde, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil; Posgraduate Program in Health and Human Development, La Salle University (UniLaSalle), Canoas, RS, Brazil.
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Fabres LF, Maschio VJ, Santos DLD, Kwitko S, Marinho DR, Araújo BSD, Locatelli CI, Rott MB. Virulent T4 Acanthamoeba causing keratitis in a patient after swimming while wearing contact lenses in Southern Brazil. Acta Parasitol 2018; 63:428-432. [PMID: 29654672 DOI: 10.1515/ap-2018-0050] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 01/09/2018] [Indexed: 12/24/2022]
Abstract
Several strains of free-living amoebae belonging to the genus Acanthamoeba can cause a painful sight-threatening disease of the cornea known as Acanthamoeba keratitis (AK). The numbers of AK cases keep rising worldwide mainly due to an increase in contact lens wearers and lack of hygiene in the maintenance of contact lenses and their cases. We report a case of AK in a healthy young woman admitted to the Hospital de Clinicas in Porto Alegre, southern Brazil. Corneal scrapings were examined for the presence of Acanthamoeba strains. The initial isolate was characterized by morphological and genotypic properties. The isolate belonged to group III according to Pussard and Pons' cyst morphology. Analysis of its 18S rDNA sequence identified the isolate as genotype T4. The T4 genotype is the most commonly reported among keratitis isolates and the most common in environmental samples.
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Affiliation(s)
- Laura Fuhrich Fabres
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
| | - Vinicius José Maschio
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
| | - Denise Leal Dos Santos
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
| | - Sergio Kwitko
- Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
| | - Diane Ruschel Marinho
- Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
| | - Bruno Schneider de Araújo
- Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
| | - Claudete Inês Locatelli
- Cornea Division, Department of Ophthalmology, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Ramiro Barcelos Street, N 2350, Porto Alegre, Rio Grande do Sul, 90035-903, Brazil
| | - Marilise Brittes Rott
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Division of Parasitology, Universidade Federal do Rio Grande do Sul, Sarmento Leite Street, N 500, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
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Steckling FM, Farinha JB, Santos DLD, Bresciani G, Mortari JA, Stefanello ST, Courtes AA, Duarte T, Duarte MMMF, Moresco RN, Cardoso MS, Soares FAA. High Intensity Interval Training Reduces the Levels of Serum Inflammatory Cytokine on Women with Metabolic Syndrome. Exp Clin Endocrinol Diabetes 2016; 124:597-601. [PMID: 27657999 DOI: 10.1055/s-0042-111044] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Objectives: This study investigate the effects of a high intensity interval training (HIIT) and 2 weeks of detraining in functional and body composition parameters, lipoproteins, glucose metabolismand inflammation markers in postmenopausal women with metabolic syndrome (MS). Design: 17 untrained women with MS underwent a HIIT program for 12 weeks. Methods: The training was performed in treadmills, 3 days per week, with intensity ranging from 70-90% of the maximum heart rate (HRmax) and 2 weeks untrained (inactive). Functional and body composition parameters were evaluated before and after the training, while maximal oxygen uptake, lipoprotein and inflammation markers were analyzed before, after training and also in detraining. Results: The HITT program resulted in changesparameters as glucose, HbA1cand NOx after training. In addition, a reduction in pro-inflammatory interleukins and an increase in IL-10 after the HIIT program were found. However, an increase in plasma levels of lipoprotein was found and body composition parameters remain unaltered.Besides, only 2 weeks of detraining are able to revert the effects on inflammatory parameters afforded by the HIIT program. Conclusions: The HIIT program used here positively affected inflammatory profile and other parameters, as glucose, HbA1cand NOx, on postmenopausal women with MS. Moreover, 2 weeks of detraining can reverse the beneficial effects of HIIT program. Our results point out the necessity to aply acontinuous HITT program, in order maintain the benefits detected, to post menopausal women with MS.
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Affiliation(s)
- F M Steckling
- Departamento de Métodos e Técnicas Desportivas, Centro de Educação Física e Desportos, Universidade Federal de Santa Maria, Brazil
| | - J B Farinha
- Departamento de Métodos e Técnicas Desportivas, Centro de Educação Física e Desportos, Universidade Federal de Santa Maria, Brazil
| | - D L D Santos
- Departamento de Métodos e Técnicas Desportivas, Centro de Educação Física e Desportos, Universidade Federal de Santa Maria, Brazil
| | - G Bresciani
- Grupo de Investigación en Rendimiento Físico y Salud (IRyS), Escuela de Educación Física, Pontificia Universidad Católica de Valparaiso, Valparaiso, Chile
| | - J A Mortari
- Departamento de Métodos e Técnicas Desportivas, Centro de Educação Física e Desportos, Universidade Federal de Santa Maria, Brazil
| | - S T Stefanello
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Brazil
| | - A A Courtes
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Brazil
| | - T Duarte
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | | | - R N Moresco
- Departamento de Análises Clinicas e Toxicológicas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Brazil
| | - M S Cardoso
- Departamento de Análises Clinicas e Toxicológicas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Brazil
| | - F A A Soares
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Brazil
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