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de Brito EDCA, França ADO, Siqueira IV, Félix VLT, Rezende AA, Amorim BC, da Silva SER, Mendes RP, Weber SS, Paniago AMM. Analysis and Interpretation of Automated Blood Count in the Treatment of Chronic Paracoccidioidomycosis. J Fungi (Basel) 2024; 10:317. [PMID: 38786672 PMCID: PMC11122400 DOI: 10.3390/jof10050317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024] Open
Abstract
Blood count is crucial for assessing bone marrow's cell production and differentiation during infections, gaging disease severity, and monitoring therapeutic responses. The profile of blood count in chronic forms of paracoccidioidomycosis (PCM) has been insufficiently explored. To better understand the changes in hematological cells in different stages of the PCM chronic form, we evaluated the blood count, including immature blood cells in automated equipment, before and during the treatment follow-up of 62 chronic PCM patients. Predominantly male (96.8%) with an average age of 54.3 (standard deviation SD 6.9) years, participants exhibited pre-treatment conditions such as anemia (45.2%), monocytosis (38.7%), and leukocytosis (17.7%), which became less frequent after clinical cure. Anemia was more prevalent in severe cases. Notably, hemoglobin and reticulocyte hemoglobin content increased, while leukocytes, monocytes, neutrophils, immature granulocytes, and platelets decreased. Chronic PCM induced manageable hematological abnormalities, mainly in the red blood series. Monocytosis, indicating monocytes' role in PCM's immune response, was frequent. Post-treatment, especially after achieving clinical cure, significant improvements were observed in various hematological indices, including immature granulocytes and reticulocyte hemoglobin content, underscoring the impact of infection on these parameters.
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Affiliation(s)
- Eliana da Costa Alvarenga de Brito
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (E.d.C.A.d.B.); (A.d.O.F.); (B.C.A.)
| | - Adriana de Oliveira França
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (E.d.C.A.d.B.); (A.d.O.F.); (B.C.A.)
| | - Igor Valadares Siqueira
- Scientific Initiation CNPq, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (I.V.S.); (V.L.T.F.); (A.A.R.); (S.E.R.d.S.)
| | - Vinícius Lopes Teodoro Félix
- Scientific Initiation CNPq, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (I.V.S.); (V.L.T.F.); (A.A.R.); (S.E.R.d.S.)
| | - Amanda Alves Rezende
- Scientific Initiation CNPq, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (I.V.S.); (V.L.T.F.); (A.A.R.); (S.E.R.d.S.)
| | - Bárbara Casella Amorim
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (E.d.C.A.d.B.); (A.d.O.F.); (B.C.A.)
| | - Suzane Eberhart Ribeiro da Silva
- Scientific Initiation CNPq, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (I.V.S.); (V.L.T.F.); (A.A.R.); (S.E.R.d.S.)
| | - Rinaldo Poncio Mendes
- Department of Tropical Diseases, Botucatu Medical School, São Paulo State University, Botucatu 18618-687, SP, Brazil;
| | - Simone Schneider Weber
- Faculty of Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil;
| | - Anamaria Mello Miranda Paniago
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil; (E.d.C.A.d.B.); (A.d.O.F.); (B.C.A.)
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2
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de Brito EDCA, Siqueira IV, Venturini J, Félix VLT, dos Santos AOGM, Mendes RP, Weber SS, Paniago AMM. Iron metabolism disorders of patients with chronic paracoccidioidomycosis. PLoS One 2023; 18:e0282218. [PMID: 37347744 PMCID: PMC10286993 DOI: 10.1371/journal.pone.0282218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 06/06/2023] [Indexed: 06/24/2023] Open
Abstract
Paracoccidioidomycosis (PCM) is caused by Paracoccidioides spp.; during infection, some host mechanisms limit the availability of iron, thereby reducing its reproduction. However, Paracoccidioides spp. can evade the immune defense and, even under limited iron conditions, use this mineral for growth and dissemination. This study evaluated the iron metabolism of 39 patients who were diagnosed with chronic PCM from 2013 to 2021. The forms of iron before treatment and at the time of clinical cure were evaluated based on the following: serum ferritin levels (storage iron); total iron-binding capacity (TIBC) and transferrin saturation (TSAT) level (transport iron); red blood cell (RBC), hemoglobin (Hb), hematocrit (HCT), and soluble transferrin receptor (sTfR) levels; and sTfR/log ferritin ratio (functional iron). The mean age of the patients was 54.5 years (±6.7 years). Most patients were men (97.4%), rural workers (92.1%), and smokers (84.6%); furthermore, most had moderate disease severity (66.7%). After achieving clinical cure, we observed that serum ferritin levels decreased, and parameters of functional iron increased. The extent of alteration in these parameters were more pronounced in severe cases than in to mild or moderate cases. Furthermore, moderate correlations were observed between C-reactive protein and the Hb (r = -0.500; p = 0.002), RBC (r = -0.461; p = 0.005), HCT (r = -0.514; p = 0.001), and iron levels (r = -0.491; p = 0.002). However, it is possible to infer that PCM interferes with functional and storage iron because improvements in these parameters after treatment as well as associations with disease severity were observed. PCM can lead to anemia of inflammation, which can be differentiated from iron deficiency anemia by a careful investigation of the iron form parameters.
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Affiliation(s)
- Eliana da Costa Alvarenga de Brito
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Igor Valadares Siqueira
- Scientific Initiation CNPq, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - James Venturini
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Vinícius Lopes Teodoro Félix
- Scientific Initiation CNPq, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Rinaldo Poncio Mendes
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- Department of Tropical Diseases, Botucatu Medical School, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil
| | - Simone Schneider Weber
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- Faculty of Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Anamaria Mello Miranda Paniago
- Graduate Program in Infectious and Parasitic Diseases, Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- Graduate Program in Health and Development of the Central West Region, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
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3
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Hahn RC, Hagen F, Mendes RP, Burger E, Nery AF, Siqueira NP, Guevara A, Rodrigues AM, de Camargo ZP. Paracoccidioidomycosis: Current Status and Future Trends. Clin Microbiol Rev 2022; 35:e0023321. [PMID: 36074014 PMCID: PMC9769695 DOI: 10.1128/cmr.00233-21] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Paracoccidioidomycosis (PCM), initially reported in 1908 in the city of São Paulo, Brazil, by Adolpho Lutz, is primarily a systemic and neglected tropical mycosis that may affect individuals with certain risk factors around Latin America, especially Brazil. Paracoccidioides brasiliensis sensu stricto, a classical thermodimorphic fungus associated with PCM, was long considered to represent a monotypic taxon. However, advances in molecular taxonomy revealed several cryptic species, including Paracoccidioides americana, P. restrepiensis, P. venezuelensis, and P. lutzii, that show a preference for skin and mucous membranes, lymph nodes, and respiratory organs but can also affect many other organs. The classical diagnosis of PCM benefits from direct microscopy culture-based, biochemical, and immunological assays in a general microbiology laboratory practice providing a generic identification of the agents. However, molecular assays should be employed to identify Paracoccidioides isolates to the species level, data that would be complemented by epidemiological investigations. From a clinical perspective, all probable and confirmed cases should be treated. The choice of treatment and its duration must be considered, along with the affected organs, process severity, history of previous treatment failure, possibility of administering oral medication, associated diseases, pregnancy, and patient compliance with the proposed treatment regimen. Nevertheless, even after appropriate treatment, there may be relapses, which generally occur 5 years after the apparent cure following treatment, and also, the mycosis may be confused with other diseases. This review provides a comprehensive and critical overview of the immunopathology, laboratory diagnosis, clinical aspects, and current treatment of PCM, highlighting current issues in the identification, treatment, and patient follow-up in light of recent Paracoccidioides species taxonomic developments.
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Affiliation(s)
- Rosane Christine Hahn
- Medical Mycology Laboratory/Investigation, Faculty of Medicine, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
- Júlio Muller Hospital, EBSERH, Cuiabá, Mato Grosso, Brazil
| | - Ferry Hagen
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, The Netherlands
- Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands
| | - Rinaldo Poncio Mendes
- Faculdade de Medicina de Botucatu, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
- Faculdade de Medicina, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, Brazil
| | - Eva Burger
- Department of Microbiology and Immunology, Federal University of Alfenasgrid.411180.d (UNIFAL), Alfenas, Minas Gerais, Brazil
| | - Andreia Ferreira Nery
- Medical Mycology Laboratory/Investigation, Faculty of Medicine, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
- Júlio Muller Hospital, EBSERH, Cuiabá, Mato Grosso, Brazil
| | - Nathan Pereira Siqueira
- Medical Mycology Laboratory/Investigation, Faculty of Medicine, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
| | - Armando Guevara
- Medical Mycology Laboratory/Investigation, Faculty of Medicine, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
| | - Anderson Messias Rodrigues
- Laboratory of Emerging Fungal Pathogens, Department of Microbiology, Immunology, and Parasitology, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
- Department of Medicine, Discipline of Infectious Diseases, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Zoilo Pires de Camargo
- Laboratory of Emerging Fungal Pathogens, Department of Microbiology, Immunology, and Parasitology, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
- Department of Medicine, Discipline of Infectious Diseases, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
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Clinical and Eco-Epidemiological Aspects of a Novel Hyperendemic Area of Paracoccidioidomycosis in the Tocantins-Araguaia Basin (Northern Brazil), Caused by Paracoccidioides sp. J Fungi (Basel) 2022; 8:jof8050502. [PMID: 35628757 PMCID: PMC9145993 DOI: 10.3390/jof8050502] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/18/2022] [Accepted: 04/20/2022] [Indexed: 12/25/2022] Open
Abstract
Paracoccidioidomycosis (PCM) is the most prevalent systemic mycosis in Brazil. The disease is caused by dimorphic fungi nested within the Paracoccidioides genus. We described 106 PCM cases (47.1 cases/year) at the Tropical Diseases Public Hospital of Tocantins State. PCM was prevalent in males and rural workers over 50 years; the chronic pulmonary form predominated in 67% of cases. The male-to-female ratio was 2.65:1, with more women affected than other endemic regions of Brazil. Urban or indoor activities were reported in women and are ascribed to disease urbanization. qPCR-based assays confirmed the identification of Paracoccidioides DNA in 37 biological specimens. Paracoccidioides sp. DNA was found in 53% of the environmental samples, suggesting autochthonous infections. Therefore, the Tocantins-Araguaia basin must be considered a novel hyperendemic area of PCM in Brazil, reinforcing the importance of including PCM as a notifiable disease, requiring specific diagnosis and health measures.
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5
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Ashraf N, Kubat RC, Poplin V, Adenis AA, Denning DW, Wright L, McCotter O, Schwartz IS, Jackson BR, Chiller T, Bahr NC. Re-drawing the Maps for Endemic Mycoses. Mycopathologia 2020; 185:843-865. [PMID: 32040709 PMCID: PMC7416457 DOI: 10.1007/s11046-020-00431-2] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 01/24/2020] [Indexed: 01/19/2023]
Abstract
Endemic mycoses such as histoplasmosis, coccidioidomycosis, blastomycosis, paracoccidioidomycosis, and talaromycosis are well-known causes of focal and systemic disease within specific geographic areas of known endemicity. However, over the past few decades, there have been increasingly frequent reports of infections due to endemic fungi in areas previously thought to be “non-endemic.” There are numerous potential reasons for this shift such as increased use of immune suppressive medications, improved diagnostic tests, increased disease recognition, and global factors such as migration, increased travel, and climate change. Regardless of the causes, it has become evident that our previous understanding of endemic regions for these fungal diseases needs to evolve. The epidemiology of the newly described Emergomyces is incomplete; our understanding of it continues to evolve. This review will focus on the evidence underlying the established areas of endemicity for these mycoses as well as new data and reports from medical literature that support the re-thinking these geographic boundaries. Updating the endemic fungi maps would inform clinical practice and global surveillance of these diseases.
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Affiliation(s)
- Nida Ashraf
- Division of Infectious Diseases, Department of Internal Medicine, University of Kansas, Kansas City, KS, USA
| | - Ryan C Kubat
- Division of Infectious Diseases, Department of Internal Medicine, University of Kansas, Kansas City, KS, USA
| | - Victoria Poplin
- Department of Internal Medicine, University of Kansas, Kansas City, KS, USA
| | - Antoine A Adenis
- Centre d'Investigation Clinique Antilles-Guyane, Inserm 1424, Centre Hospitalier de Cayenne, Cayenne, French Guiana
| | - David W Denning
- Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Laura Wright
- Geographic Research Analysis and Services Program, Division of Toxicology and Human Health Services, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Orion McCotter
- Mycotic Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ilan S Schwartz
- Division of Infectious Diseases, Department of Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Brendan R Jackson
- Mycotic Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Tom Chiller
- Mycotic Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Nathan C Bahr
- Division of Infectious Diseases, Department of Internal Medicine, University of Kansas, Kansas City, KS, USA.
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6
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da Silva LC, de Oliveira LVN, Silva FB, Santos JRN, de Araújo MLS, Mendes AGG, Miranda RDCMD, Santos DA, Holanda RA, Santos JRA. Hospitalisations for mycoses as an indicator of socio-environmental vulnerability in the Brazilian Amazon-Savanna transition region. Mycoses 2019; 63:151-161. [PMID: 31758620 DOI: 10.1111/myc.13036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/15/2019] [Accepted: 11/19/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND The infections caused by fungi represent a global concern and an important cause of hospital admissions in endemic areas. The influence of socio-environmental factors in infectious diseases has been documented; however, this phenomenon remains unclear regarding mycoses. OBJECTIVES This study aimed to analyse the spatio-temporal dynamics of hospitalisations for mycoses (HM) and the association with socio-economic and climate data in the Amazon-Savanna Transition Region in the state of Maranhão, Brazil. METHODS In this study, Spearman's correlation was applied to determine the correlation between HM, socio-economic and climatic data obtained from national databases in the period from 1998 to 2016. Hospitalisations for mycoses data were spatialised and analysed using the local Moran's index. RESULTS Our data revealed a negative and significant correlation between HM and socio-economic data regarding population, demographic density, human development index, health facilities and sanitary sewage. Significant correlations were observed between HM and precipitation, maximum temperature and minimum temperature. The main modulating climatic variable was the minimum temperature. The spatial autocorrelation analysis showed the dynamics of HM in municipalities belonging to the different regions of the state influenced by socio-economic conditions. We observed the presence of municipalities with high incidence of HM surrounded by others with low HM cases and vice versa. CONCLUSIONS Our results indicate that hospitalisations for mycoses represent an important indicator of socio-environmental vulnerability in the Amazon-Savanna transition region in Brazil. We encourage the adoption of measures to mitigate social and environmental impact on these diseases, especially in municipalities with low socio-economic status.
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Affiliation(s)
- Letícia Chagas da Silva
- Mestrado em Meio Ambiente, Laboratório de Microbiologia Ambiental, Universidade CEUMA, São Luís, Brazil
| | | | - Fabrício Brito Silva
- Mestrado em Meio Ambiente, Laboratório de Geotecnologias, Universidade CEUMA, São Luís, Brazil
| | | | | | | | | | - Daniel Assis Santos
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Julliana Ribeiro Alves Santos
- Mestrado em Meio Ambiente, Laboratório de Microbiologia Ambiental, Universidade CEUMA, São Luís, Brazil.,Mestrado em Biologia Microbiana, Universidade CEUMA, São Luís, Brazil
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Mota MADL, Damasceno LS, Bandeira SP, Leitão TDMJS. An autochthonous case of paracoccidioidomycosis in a new area of Ceara State, Northeastern Brazil. Rev Inst Med Trop Sao Paulo 2019; 61:e58. [PMID: 31618378 PMCID: PMC6792362 DOI: 10.1590/s1678-9946201961058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 08/27/2019] [Indexed: 11/21/2022] Open
Abstract
The largest endemic areas of paracoccidioidomycosis (PCM) in Brazil comprise the humid agricultural regions of the Southeast, South, and, recently, the Midwest and North regions. The Ceara State, located in the Brazilian Northeast region, presents semi-arid climate in most of its territory, characterized by high temperatures, scarce vegetation and low humidity. The objective of the present study was to describe a new autochthonous case of paracoccidioidomycosis from a distinct area of Ceara and review the characteristics of PCM occurrence in Northeastern Brazil. The patient was a 65-year-old male farmer who denied traveling outside the Ceara State or living in other locations. He was born and lived in the rural area known as Camara, bordering the municipalities of Itapaje and Itapipoca. Camara is one of the highest areas (around 720 m of altitude) of the Uruburetama mountains that exhibits tropical forests and is located in Northern Ceara, distant 139 km from the capital, Fortaleza. The patient sought for care, complaining of an oral lesion that appeared over the past three years. The hard palate lesion biopsy revealed multinucleated cells with cytoplasmic inclusions, compatible with PCM. After culture, P. brasiliensis was identified by polymerase chain reaction. Serological testing for PCM was reagent. The patient was treated with itraconazole for approximately 17 months, persisting free of symptoms after 15 months of follow-up. Regarding this new autochthonous case in the Ceara State, PCM should be considered in the differential diagnosis of patients with suggestive clinical manifestations, proceeding from the mountainous areas of Ceara.
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Affiliation(s)
- Matheus Alves de Lima Mota
- Hospital São José de Doenças Infecciosas, Fortaleza, Ceará, Brazil.,Universidade de Fortaleza, Faculdade de Medicina, Fortaleza, Ceará, Brazil
| | - Lisandra Serra Damasceno
- Hospital São José de Doenças Infecciosas, Fortaleza, Ceará, Brazil.,Universidade Federal do Ceará, Faculdade de Medicina, Departamento de Saúde Comunitária, Fortaleza, Ceará, Brazil
| | - Silviane Praciano Bandeira
- Universidade Federal do Ceará, Faculdade de Medicina, Departamento de Patologia e Medicina Legal, Fortaleza, Ceará, Brazil
| | - Terezinha do Menino Jesus Silva Leitão
- Hospital São José de Doenças Infecciosas, Fortaleza, Ceará, Brazil.,Universidade Federal do Ceará, Faculdade de Medicina, Departamento de Saúde Comunitária, Fortaleza, Ceará, Brazil
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8
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Silva FB, Santos JRN, da Silva LC, Gomes WC, Villis PCM, Gomes EDS, Pinheiro EDAD, Azevedo CDMPESD, Dias RDS, Monteiro CDA, Santos JRA. Climate drivers of hospitalizations for mycoses in Brazil. Sci Rep 2019; 9:6902. [PMID: 31061460 PMCID: PMC6502841 DOI: 10.1038/s41598-019-43353-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 04/18/2019] [Indexed: 01/26/2023] Open
Abstract
Climate can modulate human health at large spatial scales, but the influence of global, regional, and local environments remains poorly understood, especially for neglected diseases, such as mycoses. In this work, we present the correlation between climatic variables and hospitalizations for mycoses in Brazilian state capitals, evaluating the period of 2008 to 2016 at different time scales. The results indicate that climate modulates the hospitalizations for mycoses differently at annual and monthly time scales, with minimum temperature as a key climatic variable during periods of high prevalence in the 10 Brazilian capitals with the highest hospitalizations for mycoses rates. The greatest number of hospitalizations coincided with La Niña events, while a reduction was observed during El Niño events, thereby demonstrating the influence of the Pacific Interdecadal Climate Oscillation on the prevalence of mycoses in Brazil. At a regional scale, the mycoses burden in Brazil appears to respond differently to local and global climatic drivers.
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Affiliation(s)
- Fabrício Brito Silva
- Mestrado em Meio Ambiente - Universidade CEUMA (UNICEUMA), São Luís, Maranhão, Brazil
| | | | | | - Wolia Costa Gomes
- Mestrado em Meio Ambiente - Universidade CEUMA (UNICEUMA), São Luís, Maranhão, Brazil
| | | | - Eliane Dos Santos Gomes
- Discente do Curso de Engenharia Ambiental - Universidade CEUMA (UNICEUMA), São Luís, Maranhão, Brazil
| | - Edilene de Araújo Diniz Pinheiro
- Mestrado em Meio Ambiente - Universidade CEUMA (UNICEUMA), São Luís, Maranhão, Brazil.,Discente do Curso de Biomedicina - Universidade CEUMA (UNICEUMA), São Luís, Maranhão, Brazil
| | | | - Rosane da Silva Dias
- Mestrado em Gestão de Programas e Serviços de Saúde - Universidade CEUMA (UNICEUMA), São Luís, Maranhão, Brazil
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9
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Andrade UV, Oliveira SMDVLD, Chang MR, Pereira EF, Marques APDC, Carvalho LRD, Mendes RP, Paniago AMM. Treatment compliance of patients with paracoccidioidomycosis in Central-West Brazil. ACTA ACUST UNITED AC 2019; 45:e20180167. [PMID: 31017226 PMCID: PMC6733749 DOI: 10.1590/1806-3713/e20180167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 12/23/2018] [Indexed: 12/02/2022]
Abstract
Objective: To evaluate the treatment compliance of patients with paracoccidioidomycosis. Methods: We studied 188 patients with paracoccidioidomycosis admitted to a tertiary referral hospital in the Central-West Region of Brazil from 2000 to 2010, to assess their compliance to treatment. In order to be considered compliant, patients needed to present two established criteria: (1) receive medicines from the pharmacy, and (2) achieve a self-reported utilization of at least 80% of the dispensed antifungal compounds prescribed since their previous appointment. Results: Most patients were male (95.7%), had the chronic form of the disease (94.2%), and were treated with cotrimoxazole (86.2%). Only 44.6% of patients were treatment compliant. The highest loss to follow-up was observed in the first 4 months of treatment (p < 0.02). Treatment compliance was higher for patients with than for those without pulmonary involvement (OR: 2.986; 95%CI 1.351-6.599), and higher for patients with than without tuberculosis as co-morbidity (OR: 2.763; 95%CI 1.004-7.604). Conclusions: Compliance to paracoccidioidomycosis treatment was low, and the period with the highest loss to follow-up corresponds to the first four months. Pulmonary paracoccidioidal involvement or tuberculosis comorbidity predicts a higher compliance to paracoccidioidomycosis therapy.
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Ramos H, Guimarães V, Amaral I, Castro J. Paracoccidioidomycosis in the external ear. IDCases 2019; 15:e00504. [PMID: 30868065 PMCID: PMC6383324 DOI: 10.1016/j.idcr.2019.e00504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 02/08/2019] [Accepted: 02/09/2019] [Indexed: 11/26/2022] Open
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11
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Dutra LM, Silva THM, Falqueto A, Peçanha PM, Souza LRM, Gonçalves SS, Velloso TRG. Oral paracoccidioidomycosis in a single-center retrospective analysis from a Brazilian southeastern population. J Infect Public Health 2017; 11:530-533. [PMID: 29153538 DOI: 10.1016/j.jiph.2017.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 10/05/2017] [Accepted: 10/12/2017] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Paracoccidioidomycosis (PCM) is the most prevalent endemic systemic fungal infection in Latin America. In Brazil, it stands out as the eighth-highest cause of mortality among chronic or recurrent infections and has the highest mortality rate among systemic mycoses. Oral mucosal lesions may be the first visible physical manifestation of the disease. This study traced the epidemiological and clinical profiles of patients with oral lesions treated at the University Hospital Cassiano Antonio Moraes, Federal University of Espirito Santo. METHODS A retrospective cross-sectional analysis of patient medical records was performed. RESULTS Among the 161 patients identified with a confirmed diagnosis of PCM, 97 (60.24%) presented with oral lesions. The male:female ratio was 15:1, the mean age was 50.5 years, and the chronic form of paracoccidioidomycosis was predominant. Most of the patients had smoking habits and were rural workers. The most common oral lesions present in various anatomical sites were mulberry-like ulcers, more frequently observed in the gingiva, with regression within one to three months. Patients completed the treatment in one to two years (32.99%), and 47.42% of cases discontinued treatment. CONCLUSIONS In addition to the characteristics of the oral lesions, information from the clinical profiles of patients with oral PCM is a central tool for dentists for early diagnosis. Earlier diagnosis may result in fewer consequences, especially respiratory ones that may cause an inability to work and poor quality of life.
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Affiliation(s)
| | - Thiago H M Silva
- Graduate Dentristry of Espírito Santo Federal University, Vitória, Brazil.
| | - Aloísio Falqueto
- Division of Infectious Diseases, Espírito Santo Federal University, Vitória, Brazil.
| | - Paulo M Peçanha
- Department of Clinical Medicine, Espírito Santo Federal University, Vitória, Brazil.
| | - Lucia R M Souza
- Department of Pathology, Espírito Santo Federal University, Vitória, Brazil.
| | - Sarah S Gonçalves
- Department of Pathology, Espírito Santo Federal University, Vitória, Brazil.
| | - Tânia R G Velloso
- Department of Clinical Dentistry, Espírito Santo Federal University, Vitória, Brazil.
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12
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Mansano ESB, de Morais GR, Moratto EM, Sato F, Baesso ML, Medina AN, Svidzinski TIE, Hernandes L. Combination of Histopathology and FT-Raman Spectroscopy for the Study of Experimental Paracoccidioidomycosis in the Spleen. Photochem Photobiol 2017; 94:88-94. [DOI: 10.1111/php.12840] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 09/01/2017] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Francielle Sato
- Department of Physics; Universidade Estadual de Maringá; Maringá Paraná Brasil
| | | | - Antonio Neto Medina
- Department of Physics; Universidade Estadual de Maringá; Maringá Paraná Brasil
| | | | - Luzmarina Hernandes
- Department of Morphological Sciences; Universidade Estadual de Maringá; Maringá Paraná Brasil
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13
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Martinez R. New Trends in Paracoccidioidomycosis Epidemiology. J Fungi (Basel) 2017; 3:jof3010001. [PMID: 29371520 PMCID: PMC5715958 DOI: 10.3390/jof3010001] [Citation(s) in RCA: 163] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 12/22/2016] [Accepted: 12/28/2016] [Indexed: 12/02/2022] Open
Abstract
Paracoccidioidomycosis is a systemic fungal disease occurring in Latin America and more prevalent in South America. The disease is caused by the dimorphic fungus Paracoccidioides spp. whose major hosts are humans and armadillos. The fungus grows in soil and its infection is associated with exposure to the rural environment and to agricultural activities, with a higher risk in coffee and tobacco plantations. Population studies assessing the reactivity to Paracoccidioides spp. antigens by intradermal reaction or serological tests have detected previous subclinical infections in a significant proportion of healthy individuals living in various endemic countries. Paracoccidioidomycosis-disease is manifested by a small minority of infected individuals. The risk of developing the disease and its type of clinical form are related to the personal and life style characteristics of infected individuals, including genetic background, age, sex, ethnicity, smoking habit, alcohol drinking, and eventual cellular immunosuppression. Brazil, Colombia, Venezuela, Argentina, and Ecuador have endemic areas that had already been defined in the 20th century. The incidence of paracoccidioidomycosis can be altered by climate phenomena and mainly by human migration and occupation of poorly explored territories. In Brazil, the endemy tends to expand towards the North and Center-West around the Amazon Region.
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Affiliation(s)
- Roberto Martinez
- Division of Infectious Diseases, Department of Internal Medicine, Ribeirão Preto Medical School, Universidade de São Paulo, Sao Paulo 14049-900, Brazil.
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14
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García-Romero MT, Lara-Corrales I, Kovarik CL, Pope E, Arenas R. Tropical Skin Diseases in Children: A Review- Part I. Pediatr Dermatol 2016; 33:253-63. [PMID: 27040351 DOI: 10.1111/pde.12831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Because of travel and migration patterns, tropical skin diseases are now seen all around the world, not just in tropical or developing countries. Nutrition, housing, and environmental factors play an important role in these infectious diseases, so when they appear out of their normal environments, their classic presentation may vary. Tropical diseases can also present differently in childhood, making their recognition, diagnosis, and management a clinical challenge. Health care providers in developed countries need to be familiar with tropical skin diseases and be able to diagnose them in returning travelers or immigrants in order to optimize care. This article aims to review the epidemiologic, clinical, diagnostic, and therapeutic aspects of some of the most common tropical dermatologic conditions in children.
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Affiliation(s)
| | - Irene Lara-Corrales
- Dermatology Section, Department of Pediatric Medicine, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Carrie L Kovarik
- Department of Dermatology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Elena Pope
- Dermatology Section, Department of Pediatric Medicine, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Roberto Arenas
- Mycology Section, Hospital General Dr. Manuel Gea González, Mexico City, Mexico
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15
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Abstract
The epidemiological characteristics of paracoccidioidomycosis were reviewed and
updated. The new endemic areas in Brazil were discussed in the section regarding the
geographic distribution of the mycosis. Subclinical infection with
Paracoccidioides brasiliensis was discussed on the basis of skin
test surveys with antigens of the fungus, seroepidemiological studies, and disease
cases outside Latin America. Large case series permitted a comparison of the
prevalence of the mycosis in different regions, its estimated incidence and risk
factors for the development of the disease. Aspects modulating the expression of the
clinical forms of paracoccidioidomycosis are also presented. This review also deals
with diseases associated with the mycosis, opportunistic paracoccidioidomycosis,
lethality, mortality and infection and disease in animals.
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Affiliation(s)
- Roberto Martinez
- Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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16
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Important Mycoses in Children in South America. CURRENT FUNGAL INFECTION REPORTS 2016. [DOI: 10.1007/s12281-016-0249-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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da Silva JDF, de Oliveira HC, Marcos CM, Assato PA, Fusco-Almeida AM, Mendes-Giannini MJS. Advances and challenges in paracoccidioidomycosis serology caused by Paracoccidioides species complex: an update. Diagn Microbiol Infect Dis 2015; 84:87-94. [PMID: 26494541 DOI: 10.1016/j.diagmicrobio.2015.06.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 06/01/2015] [Accepted: 06/07/2015] [Indexed: 10/23/2022]
Abstract
Understanding the possible methodologies for the rapid and inexpensive identification of fungal infections is essential for disease diagnosis, but there are some limitations. To help with this problem, serological methods that detect antigens or antibodies are widely used and are useful for the diagnosis of paracoccidioidomycosis (PCM) through the detection of gp43, which is the main antigen employed for the immunodiagnosis of this disease caused by Paracoccidioides brasiliensis. However, the use of gp43 has become restricted because it was recently found that this marker is not identified in the infections caused by Paracoccidioides lutzii. Therefore, it is necessary to identify new antigens in both species or antigens specific for P. lutzii to decrease the morbidity and/or mortality associated with PCM. This review provides a discussion of new diagnostic challenges after the recent discoveries regarding the taxonomy of the Paracoccidioides genus.
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Affiliation(s)
- Julhiany de Fátima da Silva
- Faculdade de Ciências Farmacêuticas de Araraquara, FCFAr, UNESP - Univ Estadual Paulista, Araraquara, Departamento de Análises Clínicas, SP, Brazil
| | - Haroldo Cesar de Oliveira
- Faculdade de Ciências Farmacêuticas de Araraquara, FCFAr, UNESP - Univ Estadual Paulista, Araraquara, Departamento de Análises Clínicas, SP, Brazil
| | - Caroline Maria Marcos
- Faculdade de Ciências Farmacêuticas de Araraquara, FCFAr, UNESP - Univ Estadual Paulista, Araraquara, Departamento de Análises Clínicas, SP, Brazil
| | - Patricia Akemi Assato
- Faculdade de Ciências Farmacêuticas de Araraquara, FCFAr, UNESP - Univ Estadual Paulista, Araraquara, Departamento de Análises Clínicas, SP, Brazil
| | - Ana Marisa Fusco-Almeida
- Faculdade de Ciências Farmacêuticas de Araraquara, FCFAr, UNESP - Univ Estadual Paulista, Araraquara, Departamento de Análises Clínicas, SP, Brazil
| | - Maria José Soares Mendes-Giannini
- Faculdade de Ciências Farmacêuticas de Araraquara, FCFAr, UNESP - Univ Estadual Paulista, Araraquara, Departamento de Análises Clínicas, SP, Brazil.
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18
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Mansano ESB, de Morais GR, Moratto EM, Sato F, Medina Neto A, Svidzinski TIE, Baesso ML, Hernandes L. Correlation between histopathological and FT-Raman spectroscopy analysis of the liver of Swiss mice infected with Paracoccidioides brasiliensis. PLoS One 2014; 9:e106256. [PMID: 25181524 PMCID: PMC4152158 DOI: 10.1371/journal.pone.0106256] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 08/01/2014] [Indexed: 11/21/2022] Open
Abstract
Paracoccidioidomycosis is the most important systemic mycosis in Latin America. The main entrance of the fungus is the airway. It primarily occurs in the lung, but in its disseminated form may affect any organ. The liver is one of the organs afflicted by this disease and its homeostasis may be impaired. The aim of the present study was to evaluate the evolution of paracoccidioidomycosis in the liver of Swiss mice and correlate morphological factors with the expression of gp43 and with physicochemical analysis via FT-Raman of the infected organ. According to colony forming unit (CFU) and granuloma counting, the first and second weeks were the periods when infection was most severe. Tissue response was characterized by the development of organized granulomas and widespread infection, with yeasts located within the macrophages and isolated hepatocytes. The gp43 molecule was distributed throughout the hepatic parenchyma, and immunostaining was constant in all observed periods. The main physicochemical changes of the infected liver were observed in the spectral ranges between 1700-1530 cm(-1) and 1370-1290 cm(-1), a peak shifting center attributed to phenylalanine and area variation of -CH2 and -CH3 compounds associated to collagen, respectively. Over time, there was a direct proportional relationship between the number of CFUs, the number of granulomas and the physicochemical changes in the liver of mice infected with Paracoccidioides brasiliensis. The expression of gp43 was similar in all observed periods.
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Affiliation(s)
| | | | | | - Francielle Sato
- Department of Physics, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Antonio Medina Neto
- Department of Physics, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | | | - Mauro Luciano Baesso
- Department of Physics, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Luzmarina Hernandes
- Department of Morphological Sciences, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
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19
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Fabris LR, Andrade ÚV, Ferreira Dos Santos A, Marques APDC, Oliveira SMDVLD, Mendes RP, Paniago AMM. Decreasing prevalence of the acute/subacute clinical form of paracoccidioidomycosis in Mato Grosso do Sul State, Brazil. Rev Inst Med Trop Sao Paulo 2014; 56:121-5. [PMID: 24626413 PMCID: PMC4085850 DOI: 10.1590/s0036-46652014000200006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 08/05/2013] [Indexed: 05/28/2023] Open
Abstract
With the objective to evaluate the behavior of paracoccidioidomycosis
in the last three decades, clinical and epidemiological data of 595 patients
admitted to clinical services of the Federal University of Mato Grosso do Sul
from 1980 to 2009 were investigated. Gender, age distribution, clinical form,
comorbidity with tuberculosis or AIDS, and mortality were compared by decades of
clinical admission. It was shown that during the three decades there was a
decrease in women percentage, and the same manner occurred a reduction in
participants in the age group of 20 to 39 years. Moreover, the acute/subacute
forms have been diminished in the period. These fluctuations are closely related
and can be simultaneously analyzed. Increased AIDS co-infection prevalence from
the first to the second decade was also revealed, coinciding with the appearance
of the retroviral epidemic and stabilizing during the third decade. No change in
the tuberculosis co-infection rate was observed (overall = 6.9%). It
reinforces the importance of this co-morbidity. The overall mortality rate
remained steady at 6.7%, not varying significantly from one decade to another.
The persistent mortality rate calls attention to the importance of this
neglected disease.
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Affiliation(s)
- Larissa Rodrigues Fabris
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo GrandeMS, Brazil, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil. E-mails: , , , ,
| | - Úrsulla Vilella Andrade
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo GrandeMS, Brazil, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil. E-mails: , , , ,
| | - Aline Ferreira Dos Santos
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo GrandeMS, Brazil, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil. E-mails: , , , ,
| | - Ana Paula da Costa Marques
- Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande (UFMS)MS, Brazil, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande (UFMS), MS, Brazil. E-mail:
| | - Sandra Maria do Valle Leone de Oliveira
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo GrandeMS, Brazil, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil. E-mails: , , , ,
| | - Rinaldo Pôncio Mendes
- Faculdade de Medicina, Universidade Estadual Paulista (UNESP), BotucatuSP, Brazil, Faculdade de Medicina, Universidade Estadual Paulista (UNESP), Botucatu, SP, Brazil. E-mail:
| | - Anamaria Mello Miranda Paniago
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo GrandeMS, Brazil, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil. E-mails: , , , ,
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20
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Marques SA. Paracoccidioidomycosis: epidemiological, clinical, diagnostic and treatment up-dating. An Bras Dermatol 2014; 88:700-11. [PMID: 24173174 PMCID: PMC3798345 DOI: 10.1590/abd1806-4841.20132463] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 02/18/2013] [Indexed: 11/22/2022] Open
Abstract
Paracoccidioidomycosis is an acute - to chronic systemic mycosis caused by fungi of
the genus Paracoccidioides. Due to its frequent tegument clinical expression,
paracoccidioidomycosis is an important disease for dermatologists, who must be
up-to-date about it. This article focuses on recent epidemiological data and
discusses the new insights coming from molecular studies, as well as those related to
clinical, diagnostic and therapeutic aspects. In the latter section, we give
particular attention to the guideline on paracoccidioidomycosis organized by
specialists in this subject.
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21
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Fagundes J, Castilho ML, Téllez Soto CA, Vieira LDS, Canevari RA, Fávero PP, Martin AA, Raniero L. Ribosomal DNA nanoprobes studied by Fourier transform infrared spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:28-35. [PMID: 24036304 DOI: 10.1016/j.saa.2013.08.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 08/06/2013] [Accepted: 08/14/2013] [Indexed: 06/02/2023]
Abstract
Paracoccidioides brasiliensis (P. brasiliensis) is a thermo-dimorphic fungus that causes paracoccidioidomycosis. Brazil epidemiological data shows that endemic areas are the subtropical regions, especially where agricultural activities predominate such as the Southeast, South, and Midwest. There are several tests to diagnose paracoccidioidomycosis, but they have many limitations such as low sensitivity, high cost, and a cross-reacting problem. In this work, gold nanoprobes were used to identify P. brasiliensis as an alternative diagnostic technique, which is easier to apply, costs less, and has great potential for application. The specific Ribosomal sequence of P. brasiliensis DNA was amplified and used to design the nanoprobes using a thiol-modified oligonucleotide. The results of positive and negative tests were done by UV-visible and Fourier Transform Infrared (FT-IR) measurements. The deconvolution of FT-IR sample spectra showed differences in the vibrational modes from the hydrogen bridge NHN and NHO bands that form the double helix DNA for samples matching the DNA sequence of nanoprobes that could be used to classify the samples.
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Affiliation(s)
- Jaciara Fagundes
- Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UniVap, Shishima Hifumi Avenue, 2911, 12244-000 São José dos Campos, São Paulo, Brazil
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