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Borges LP, Vieira SCF, Gurgel RQ, Silva BDM, Ferreira CS, Santos SMSAD, Santana LADM. Neutralizing Antibodies Response for SARS-CoV-2 Among Young Inmates and Staff From a Juvenile Offender Institution in Brazil. Disaster Med Public Health Prep 2023; 17:e496. [PMID: 37750355 DOI: 10.1017/dmp.2023.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Affiliation(s)
- Lysandro Pinto Borges
- Department of Pharmacy, Federal University of Sergipe (UFS), São Cristóvão, SE, Brazil
| | - Sarah Cristina Fontes Vieira
- Department of Medicine and Graduate Program in Health Sciences, Federal University of Sergipe (UFS), Aracaju, SE, Brazil
| | - Ricardo Queiroz Gurgel
- Department of Medicine and Graduate Program in Health Sciences, Federal University of Sergipe (UFS), Aracaju, SE, Brazil
| | - Breno de Mello Silva
- Department of Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, MG, Brazil
| | - Cyntia Silva Ferreira
- Department of Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, MG, Brazil
| | | | - Lucas Alves da Mota Santana
- Department of Dentistry, Federal University of Sergipe (UFS), Aracaju, SE, Brazil
- Graduate Program in Dentistry, Federal University of Sergipe (UFS), Aracaju, SE, Brazil
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Martins AF, de Souza DRV, de Rezende Neto JM, Santos AA, da Invenção GB, Matos ILS, dos Santos KA, de Jesus PC, da Silva FA, de Almeida FHO, do Vale FYN, Fonseca DLM, Schimke LF, Matos SS, Oliveira BM, Ferreira CS, de Paula Dias B, dos Santos SMSA, Barbosa CC, de Carvalho Barreto ID, Moreno AKM, Gonçalves RL, de Mello Silva B, Cabral-Marques O, Borges LP. A higher number of SARS-COV-2 infections in quilombola communities than in the local population in Brazil. Front Public Health 2023; 11:1095162. [PMID: 37304100 PMCID: PMC10253171 DOI: 10.3389/fpubh.2023.1095162] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 05/11/2023] [Indexed: 06/13/2023] Open
Abstract
The historical and social vulnerability of quilombola communities in Brazil can make them especially fragile in the face of COVID-19, considering that several individuals have precarious health systems and inadequate access to water. This work aimed to characterize the frequency of SARS-COV-2 infections and the presence of IgM and IgG SARS-CoV-2 antibodies in quilombola populations and their relationship with the presence of risk factors or preexisting chronic diseases in the quilombola communities. We analyzed the sociodemographic and clinical characteristics, serological status, comorbidities, and symptoms of 1,994 individuals (478 males and 1,536 females) from 18 Brazilian municipalities in the State of Sergipe of quilombola communities, which were evaluated at different epidemiological weeks, starting at the 32nd (August 6th) and ending at the 40th (October 3rd) epidemiological week. More than 70% of studied families live in rural areas and they have an extreme poverty social status. Although we found a higher number of SARS-COV-2 infections in quilombola communities than in the local population, their SARS-CoV-2 reactivity and IgM and IgG positivity varied across the communities investigated. Arterial hypertension was the most risk factor, being found in 27.8% of the individuals (9.5% in stage 1, 10.8% in stage 2, and 7.5% in stage 3). The most common COVID-19 symptoms and comorbidities were headache, runny nose, flu, and dyslipidemia. However, most individuals were asymptomatic (79.9%). Our data indicate that mass testing must be incorporated into public policy to improve the health care system available to quilombola populations during a future pandemic or epidemic.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Fernando Yuri Nery do Vale
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences University of São Paulo, São Paulo, Brazil
| | - Dennyson Leandro M. Fonseca
- Interunit Postgraduate Program on Bioinformatics, Institute of Mathematics and Statistics (IME), University of São Paulo (USP), São Paulo, SP, Brazil
| | - Lena F. Schimke
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Saulo Santos Matos
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | | | - Cyntia Silva Ferreira
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Bruna de Paula Dias
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | | | - Camila Cavadas Barbosa
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | | | - Ana Karolina Mendes Moreno
- Postgraduate Program in Animal Biodiversity, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Brazil
| | - Ricardo Lemes Gonçalves
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Breno de Mello Silva
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Otavio Cabral-Marques
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences University of São Paulo, São Paulo, Brazil
- Interunit Postgraduate Program on Bioinformatics, Institute of Mathematics and Statistics (IME), University of São Paulo (USP), São Paulo, SP, Brazil
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
- Department of Pharmacy and Postgraduate Program of Health and Science, Federal University of Rio Grande do Norte, Natal, Brazil
- Department of Medicine, Division of Molecular Medicine, University of São Paulo School of Medicine, São Paulo, Brazil
- Laboratory of Medical Investigation 29, University of São Paulo School of Medicine, São Paulo, Brazil
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Dias BDP, Barbosa CC, Ferreira CS, Mayra Soares Alves Dos Santos S, Arrieta OAP, Malta WC, Gomes MLMD, Alves E Silva M, Fonseca JDM, Borges LP, Silva BDM. Challenges in Direct Detection of Flaviviruses: A Review. Pathogens 2023; 12:pathogens12050643. [PMID: 37242313 DOI: 10.3390/pathogens12050643] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/28/2023] Open
Abstract
Arthropods transmit arboviruses via mosquito and tick bites to humans and other animals. The genus flavivirus, which causes diseases, sequelae, and thousands of deaths, mainly in developing and underdeveloped countries, is among the arboviruses of interest to public health. Given the importance of early and accurate diagnosis, this review analyzes the methods of direct detection of flaviviruses, such as reverse transcription loop-mediated isothermal amplification, microfluidics, localized surface plasmon resonance, and surface-enhanced Raman scattering, and presents the advantages, disadvantages, and detection limits identified in studies reported in the literature for each methodology. Among the different methods available, it is essential to balance four fundamental indicators to determine the ideal test: good sensitivity, high specificity, low false positive rate, and rapid results. Among the methods analyzed, reverse transcription loop-mediated isothermal amplification stands out, owing to result availability within a few minutes, with good sensitivity and specificity; in addition, it is the best-characterized methodology.
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Affiliation(s)
- Bruna de Paula Dias
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Camila Cavadas Barbosa
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Cyntia Silva Ferreira
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | | | | | | | | | - Mariela Alves E Silva
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Júlia de Matos Fonseca
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
| | - Lysandro Pinto Borges
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão 9100-000, Brazil
| | - Breno de Mello Silva
- Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto 35400-000, Brazil
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de Melo RB, Ferreira CS, Lopes A, Vinson CC, Franco AC. Dispersal mode constrains allocation of carbon and mineral nutrients in seeds of forest and savanna trees. Plant Biol (Stuttg) 2020; 22:203-211. [PMID: 31762113 DOI: 10.1111/plb.13075] [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: 08/05/2019] [Accepted: 11/10/2019] [Indexed: 06/10/2023]
Abstract
Species vary in seed size and content of stored reserves, which can be related to dispersal strategies and type of habitat in which they are found. We compare seed carbon and nutrient reserves of anemochorous and zoochorous trees from the Cerrado of central Brazil. We measured seed dry mass, lipids, non-structural carbohydrates (starch and total soluble sugars), carbon and mineral nutrients in ten forest and 13 savanna species, each classified as having wind- or animal-dispersed seeds. We used phylogenetically independent contrasts to test for correlations among these traits. Seeds of anemochorous species were lighter, with higher concentrations of C, N, P, Ca and Mg. Lipids were the dominant carbon reserve for most anemochorous species, underpinning the importance of allocation to compact carbon reserves. Starch, lipids or soluble sugars were the major carbon reserve in zoochorous seeds. Savanna and forest species did not differ in seed mass or in total carbon reserves. However, seeds of forest species had higher concentrations of starch than seeds of savanna species. Lipid and starch negatively correlated across species, suggesting a trade-off between starch and lipids as major seed carbon reserves. Calcium was positively correlated with Mn and B, while Mg was positively correlated with C, N, P, K, S, Zn and B. Potassium, S and Cl were positively correlated, while P was positively correlated with Mg and Zn. Dispersal mode rather than vegetation type constrained seed mass and seed storage allocation patterns in forest and savanna trees. We provide evidence that similar mechanisms are involved in seed storage of carbon and mineral nutrients across species.
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Affiliation(s)
- R B de Melo
- Department of Botany, University of Brasilia, Brasilia, Brazil
| | - C S Ferreira
- Department of Botany, University of Brasilia, Brasilia, Brazil
| | - A Lopes
- Department of Ecology, University of Brasilia, Brasilia, Brazil
| | - C C Vinson
- Department of Botany, University of Brasilia, Brasilia, Brazil
| | - A C Franco
- Department of Botany, University of Brasilia, Brasilia, Brazil
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Carneiro ACA, Costa GP, Ferreira CS, Ramos IPR, Sarandy MM, Leite ALJ, Menezes APJ, Silva BM, Nogueira KOPC, Carvalho ACC, Gonçalves RV, Talvani A. Combination therapy with benznidazole and doxycycline shows no additive effect to monotherapy with benznidazole in mice infected with the VL-10 strain of the Trypanosoma cruzi. Int J Cardiol 2020; 299:243-248. [PMID: 31353153 DOI: 10.1016/j.ijcard.2019.07.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/20/2019] [Accepted: 07/15/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Chagas heart disease is the most important clinical manifestation of Trypanosoma cruzi infection. Pharmacological therapies have been proposed aiming to reduce inflammatory response and cardiac damage in infected hosts. In this study, we investigated the use of doxycycline (Dox), in a sub-antimicrobial dose, in monotherapy and in combination with benznidazole (Bz) during the acute phase of infection with the VL-10 strain of T. cruzi, evaluating the therapeutic effect during the acute and chronic phases of the infection. METHODS AND RESULTS C57BL/6 mice were treated for 20 days with Dox (30 mg/kg), Bz (100 mg/kg), or both drugs in combination starting 9 days after infection. Parasitemia was measured during the acute phase and the animals were monitored for 12 months, after which echocardiography analysis was performed. Blood samples were obtained from euthanized mice for CCL2, CCL5, IL-10 analysis, and cardiac fragments were collected for histopathological evaluation. Dox treatment did not ameliorate parasitological/inflammatory parameters but reduced the cardiac collagen neoformation (CN) in 35%. In contrast, Bz administration reduced parasitemia, plasma levels of CCL2 and CCL5, and cardiac infiltration during acute infection, and reduced the level of IL-10 and CN (95%) at 12 months. Dox was unable to improve ejection fraction, while Bz treatment ameliorated the ejection fraction. No additive effect was observed in combination therapy. CONCLUSION Dox monotherapy is not effective in the acute or chronic phases of experimental cardiomyopathy induced by the VL-10 strain of T. cruzi. Furthermore, combination therapy with Dox does not potentiate the effects of Bz monotherapy.
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Affiliation(s)
- Ana Cláudia Alvarenga Carneiro
- Laboratório de Imunobiologia da Inflamação, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | - G P Costa
- Laboratório de Imunobiologia da Inflamação, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | - Cyntia Silva Ferreira
- Laboratório de Biologia e Tecnologia de Micro-organismos, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | | | - Mariáurea Matias Sarandy
- Laboratório de Patologia Experimental, Departamento de Biologia Animal, Universidade Federal de Viçosa Minas Gerais, Brazil
| | - Ana Luísa Junqueira Leite
- Laboratório de Imunobiologia da Inflamação, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | - A P J Menezes
- Laboratório de Imunobiologia da Inflamação, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | - B M Silva
- Laboratório de Biologia e Tecnologia de Micro-organismos, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | - K O P C Nogueira
- Laboratório de Biomateriais e Patologia Experimental, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil
| | - A C C Carvalho
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Brazil
| | - Reggiani Vilela Gonçalves
- Laboratório de Patologia Experimental, Departamento de Biologia Animal, Universidade Federal de Viçosa Minas Gerais, Brazil
| | - André Talvani
- Laboratório de Imunobiologia da Inflamação, Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Minas Gerais, Brazil.
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Calado R, Ferreira CS, Nogueira P, Melo P. Caries prevalence and treatment needs in young people in Portugal: the third national study. Community Dent Health 2017; 34:107-111. [PMID: 28573842 DOI: 10.1922/cdh_4016calado05] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 11/23/2016] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To evaluate caries prevalence and dental treatment needs in Portuguese children and teenagers, as well as fluorosis prevalence in 12-year-old children, in order to address public oral health program strategies. PARTICIPANTS A representative stratified random cluster sample of 3,710 participants of 6, 12, and 18 years old was selected. A questionnaire was applied to determine sociodemographic data and some oral health determinants. The clinical examination was based on the ICDAS criteria, then adapted to DMFS index, and Dean's index for fluorosis. RESULTS Caries prevalence at 6, 12, and 18 years old was 45.2%, 47.0%, and 67.6%, respectively. D₅MFT scores were 1.18 (SD 0.06) and 2.51 (SD 0.10), respectively. Treatment needs at 12 and 18 years old were associated with 0.37 (SD 0.03) and 0.75 (SD 0.06) values in the "decayed" (D₅) variable. SiC index at 12 years old was 2.68 (SD 1.68). Sealants were identified in 55% of 12-year-old children and the mean of sealants per individual was 3.61; also, moderate (2.2%) and severe (0.2%) levels of fluorosis were detected. CONCLUSIONS The oral health situation in Portugal is favorable for young people, resulting in low treatment needs. The National Oral Health Promotion Program should be extended to include 18-year-olds.
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Affiliation(s)
- R Calado
- ACES Médio Tejo, Riachos, Portugal / National Oral Health Promotion Program, Directorate-General of Health (DGS), Lisbon, Portugal
| | - C S Ferreira
- Oral health task force of the DGS / Saúde Oral Bibliotecas Escolares, DGS, Lisbon, Portugal
| | - P Nogueira
- Directorate of Analysis and Information, DGS, Lisbon, Portugal / ISAMB - Faculty of Medicine of the University of Lisbon, Portugal
| | - P Melo
- Portuguese Dental Association, Oporto, Portugal / Oral Public Health, Institute of Public Health, Faculty of Dentistry of the University of Oporto, Portugal
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Ferreira CS, Ladeira LO, Leite CF, da Fonseca FG, Ribeiro EMDC, Versiani AF, Silva JFDS, Magalhães CLDB, Silva BDM. Uso de nanobastões de ouro para o desenvolvimento de aulas práticas de nanotecnologia. QUIM NOVA 2017. [DOI: 10.21577/0100-4042.20170021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Silva Ferreira C, de Castro Ribeiro EM, Miranda Goes AD, Mello Silva BD. Current strategies for diagnosis of paracoccidioidomycosis and prospects of methods based on gold nanoparticles. Future Microbiol 2016; 11:973-85. [DOI: 10.2217/fmb-2016-0062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Paracoccidioidomycosis (PCM) is a human systemic granulomatous mycosis caused by thermodimorphic fungi from Paracoccidioides genus. The disease is prevalent in Latin America and triggers a serious clinical condition. Consequently, rapid diagnosis and treatment are crucial to prevent progression of the disease, which can result in death. Currently, there are several established methods for PCM diagnosis. However, many of these tests still present challenges in terms of cost, accessibility and efficiency. In this scenario, gold nanoparticles represent a promising alternative since they have particular optical and electronic properties, which allow its use for biomolecules detection. This review will briefly present techniques available for PCM diagnosis and the perspectives of implementation of gold nanoparticles for diagnosis of this mycosis.
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Affiliation(s)
- Cyntia Silva Ferreira
- Departamento de Ciências Biológicas/DECBI – Núcleo de Pesquisas em Ciências Biológicas/NUPEB – Universidade Federal de Ouro Preto (UFOP), Campus Universitário Morro do Cruzeiro – Ouro Preto, CEP 35400-000, Minas Gerais, Brasil
| | - Erica Milena de Castro Ribeiro
- Departamento de Ciências Biológicas/DECBI – Núcleo de Pesquisas em Ciências Biológicas/NUPEB – Universidade Federal de Ouro Preto (UFOP), Campus Universitário Morro do Cruzeiro – Ouro Preto, CEP 35400-000, Minas Gerais, Brasil
| | - Alfredo de Miranda Goes
- Departamento de Bioquímica e Imunologia/ICB – Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, Belo Horizonte, CEP 31270-901, Minas Gerais, Brasil
| | - Breno de Mello Silva
- Departamento de Ciências Biológicas/DECBI – Núcleo de Pesquisas em Ciências Biológicas/NUPEB – Universidade Federal de Ouro Preto (UFOP), Campus Universitário Morro do Cruzeiro – Ouro Preto, CEP 35400-000, Minas Gerais, Brasil
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Sousa ED, Costa TP, Werther K, Durigon EL, Araujo JD, Ferreira CS, Pinto AA. Presence of antibodies against H5, H7 and H9 influenza A virus in wild birds in the State of São Paulo, Brazil. Rev Bras Cienc Avic 2013. [DOI: 10.1590/s1516-635x2013000300001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | - T P Costa
- Universidade Estadual Paulista, Brazil
| | - K Werther
- Universidade Estadual Paulista, Brazil
| | | | | | | | - AA Pinto
- Universidade Estadual Paulista, Brazil
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Angelo PC, Ferreira ACS, Fonseca VD, Frade SP, Ferreira CS, Malta FSV, Pereira AK, Leite HV, Brum AP, Pardini VC, Gomes KB, Cabral ACV. Cryopreservation does not alter karyotype, multipotency, or NANOG/SOX2 gene expression of amniotic fluid mesenchymal stem cells. Genet Mol Res 2012; 11:1002-12. [PMID: 22576926 DOI: 10.4238/2012.april.19.5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Cryopreservation of mesenchymal stem cells from amniotic fluid is of clinical importance, as these cells can be harvested during the prenatal period and stored for use in treatments. We examined the behavior of mesenchymal stem cells from human amniotic fluid in culture that had been subjected to cryopreservation. We assessed chromosomal stability through karyotype analysis, determined whether multipotent capacity (differentiation into adipogenic, chondrogenic, and osteogenic cells) is maintained, and analyzed SOX2 and NANOG expression after thawing. Five amniotic fluid samples were cryopreserved for 150 days. No chromosomal aberrations were observed. The expression levels of NANOG and SOX2 also were quite similar before and after cryopreservation. Capacity for differentiation into adipogenic, chondrogenic, and osteogenic tissues also remained the same. We conclude that cryopreservation of amniotic fluid does not alter karyotype, NANOG/SOX2 gene expression, or multipotent capacity of stem cells that have been collected from amniotic fluid during pregnancy.
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Affiliation(s)
- P C Angelo
- Instituto Hermes Pardini, Belo Horizonte, MG, Brasil
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Muniz PT, Ferreira MU, Ferreira CS, Conde WL, Monteiro CA. Intestinal parasitic infections in young children in São Paulo, Brazil: prevalences, temporal trends and associations with physical growth. Ann Trop Med Parasitol 2002; 96:503-12. [PMID: 12194711 DOI: 10.1179/000349802125001311] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The prevalences of intestinal parasitic infections were investigated, between 1995 and 1996, in a household-based sample of 1044 children aged <5 years who lived in the city of São Paulo, Brazil. Only 10.7% of the children were infected, the most prevalent parasites being Giardia duodenalis (5.5%), Ascaris lumbricoides (4.4%) and Trichuris trichiura (1.0%). A comparison between these data and results from two previous population-based surveys, completed in São Paulo in 1974 and 1985, revealed a dramatic decrease in the prevalence of intestinal helminths in this age-group, with less marked changes in the prevalence of Giardia, over the two past decades. Despite the low prevalence of malnutrition (2.4% of stunting and 0.6% of wasting) and intestinal parasites in this population, there was a significant association (P=0.05, after controlling for potential confounding variables) between helminth (but not Giardia) infection and height. The helminth-infected children had a mean height-for-age z-score of-0.412 [95% confidence interval (CI)=-0.637--0.186], compared with one of 0.015 (CI=-0.049-0.079) for the non-infected children. No significant relationship between intestinal parasitic infection and children's weight was detected. In conclusion, a small but significant negative relationship between intestinal helminthic infections and children's growth was detected in an urban environment with low prevalences of both intestinal parasitic infection and malnutrition.
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Affiliation(s)
- P T Muniz
- Curso de Enfermagem, Departamento de Ciências da Saúde, Universidade Federal do Acre, Campus Universitário, 69915-900 Rio Branco, AC, Brazil
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Ferreira CS, Amato Neto V, Alarcón RS, Gakiya E. Identification of Cryptosporidium spp. oocysts in fecal smears stained with Heidenhain's iron hematoxylin. Rev Inst Med Trop Sao Paulo 2001; 43:341-2. [PMID: 11781606 DOI: 10.1590/s0036-46652001000600009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/22/2022] Open
Abstract
There is no paucity of methods for diagnosing Cryptosporidium spp. infection. The merits of immunoassays notwithstanding, microscopic identification of Cryptosporidium spp. oocysts in fecal samples remains an important diagnostic procedure. It owes the persistence of its use to such characteristics as dispensing with expensive equipment and kits, requiring only basic laboratory facilities, and having a low probability of false positive results when permanent slides are prepared, which can be re-examined in case of doubt. Cryptosporidium spp. oocysts can be readily identified in fecal smears prepared according to a regressive iron hematoxylin staining technique. The number of steps and their duration, as well as costs, were reduced to a minimum without loss of image quality and permanence of the preparations.
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Affiliation(s)
- C S Ferreira
- Laboratório de Investigação Médica/Parasitologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brasil
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Knöbl T, Baccaro MR, Moreno AM, Gomes TA, Vieira MA, Ferreira CS, Ferreira AJ. Virulence properties of Escherichia coli isolated from ostriches with respiratory disease. Vet Microbiol 2001; 83:71-80. [PMID: 11524167 DOI: 10.1016/s0378-1135(01)00403-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 11/18/2022]
Abstract
Eight Escherichia coli isolates from ostriches with respiratory disease were investigated for the presence of genes encoding the following adhesins: type 1 pili (fim), pili associated with pyelonephritis (pap), S fimbriae (sfa), afimbrial adhesin (afaI), temperature regulated adhesin, curli (crl, csgA) and temperature-sensitive hemagglutinin (tsh). Genes for heat labile (LT) and heat stable (STa and STb) enterotoxins, Shiga toxins (stx1 and stx2), cytotoxic necrotizing factor 1 (cnf), alpha-haemolysin (hly) and aerobactin (aer) production were also investigated. Other characteristics investigated were the presence of hemagglutination activity, growth on an iron-deficient medium, aerobactin production, serum resistance, adherence to chicken tracheal cells, pathogenicity for day-old chicks, and serogroup. Serogrouping showed that four isolates belonged to serogroup O2, two to serogroup O78, one to serogroup O9, and one to serogroup O21. The virulence genes found were: fim in all eight isolates, csgA in seven, aer in six, and pap, crl and tsh in one isolate each. All isolates analyzed were positive for mannose-resistant hemagglutination, adhered in vitro to ciliated tracheal epithelium, grew on iron-deficient medium, and showed serum resistance. Pathogenicity tests on day-old chickens revealed one highly pathogenic isolate, three of low pathogenicity and four isolates with intermediate pathogenicity.
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Affiliation(s)
- T Knöbl
- Departamento de Patologia, Faculdade de Medicina Veterinária, Universidade de Guarulhos, Praça Tereza Cristina, 01 07023-070 Guarulhos, SP, Brazil
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14
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Abstract
Although admittedly transmission of Trypanosoma cruzi infection through breastfeeding is a rare event, it involves serious risks. To test the effectiveness of pasteurization in preventing this mode of infection, three sets of samples of human milk were tested: a - contaminated with T. cruzi and pasteurized; b - contaminated with T. cruzi and non-pasteurized; c - non-contaminated and pasteurized. Samples from all sets were orally and intraperitoneally administered to 90 BALB/c mice. The animals inoculated with contaminated, non-pasteurized samples, got the infection. Controls and the animals inoculated with contaminated and pasteurized milk were not infected. The hypothesis was accepted that pasteurization inactivates T. cruzi trypomastigotes.
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Affiliation(s)
- C S Ferreira
- Laboratório de Investigação Médica, Parasitologia, LIM/46, Faculdade de Medicina, Universidade de São Paulo, SP, Brasil
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15
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Frézard F, Demicheli C, Ferreira CS, Costa MA. Glutathione-induced conversion of pentavalent antimony to trivalent antimony in meglumine antimoniate. Antimicrob Agents Chemother 2001; 45:913-6. [PMID: 11181379 PMCID: PMC90392 DOI: 10.1128/aac.45.3.913-916.2001] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [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: 11/20/2022] Open
Abstract
The standard treatment of human leishmaniases involves the use of pentavalent antimony [Sb(V)] compounds, including meglumine antimoniate. The mode of action of these compounds has not been fully elucidated. The possibility that Sb(III) is involved has been suggested; however, the biomolecule that may induce the conversion of Sb(V) to Sb(III) has not yet been identified. In the present study, we investigated both the ability of reduced glutathione (GSH) to promote the reduction of Sb(V) into Sb(III) in meglumine antimoniate and the effects of pH and temperature on this transformation. GSH did promote the reduction of Sb(V) into Sb(III) in a dose-dependent manner. When GSH and meglumine antimoniate were incubated together at a GSH/Sb molar ratio superior or equal to 5:1, all antimony was encountered in the reduced form, indicating a stoichiometry of 5:1 between GSH and Sb(V) in the reaction. The reaction between Sb(V) and GSH was favored at an acidic pH (pH 5) and an elevated temperature (37 degrees C), conditions found within the phagolysosome, in which Leishmania resides. For instance, about 30% of the Sb(V) (concentration, 2mM) was converted to Sb(III) following incubation for 3 days with 10 mM GSH at pH 5 and 37 degrees C. Our data support the hypothesis that Sb(V) would be converted by GSH, or a related thiol compound, to more toxic Sb(III) in the phagolysosome of macrophages.
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Affiliation(s)
- F Frézard
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.
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16
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Ferreira MU, Ferreira CS, Monteiro CA. [Secular trends in intestinal parasitic diseases of childhood in the city of São Paulo, Brazil (1984-1996)]. Rev Saude Publica 2000; 34:73-82. [PMID: 11434323] [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: 02/20/2023] Open
Abstract
OBJECTIVE Data from two consecutive household surveys undertaken in mid-80s and mid-90s allow to characterize and analyse secular trends in infant and child intestinal parasitic diseases in the city of S. Paulo, Brazil. METHODS The two surveys included random population samples aged from zero to 59 months (1,016 in the period of 1984-85 and 1,280 in 1995-96). Stool samples were collected in both surveys and examined by sedimentation techniques using both unstained and Lugol-stained preparations. For each survey, the study of the social distribution of the parasitic diseases took into account tertiles of the per capita family income. For the study of the determinants of secular trends, hierarchical causal models, multivariate regression analyses and calculations analogous to the ones used to assess population attributable risks were applied. RESULTS/CONCLUSIONS In the time span from the first to the second survey, there was a substantial reduction in the prevalence of all parasites (from 30.9% to 10.7%), helminths in general (from 22.3% to 4.8%), giardiasis (from 14.5% to 5.5%) and two or more species of parasites (from 13.1% to 0.5%). A significant decline in prevalence was observed in all social strata and the inverse association between income and intestinal parasites was kept unchanged in the period. Positive changes in distal (family income and maternal schooling) and intermediate determinants (housing, sanitation, and access to health care) of helminthic disease could substantially explain part of its decline in the period. The decline in giardiasis was attributed to improvement in maternal schooling, housing and sanitation. The duplication in the attendance rate to day care nurseries may have restricted the decline rate in the giardiasis prevalence in the study period.
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Affiliation(s)
- M U Ferreira
- Departamento de Parasitologia do Instituto de Ciências Biomédicas da Universidade de São Paulo, São Paulo, SP, Brasil.
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17
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Carvalho ME, Latorre MR, Ferreira CS, da Silva Mello C, Barata JM. [Seroprevalence of Triatoma infestans Chagas disease after vector control measures]. Rev Saude Publica 2000; 34:15-20. [PMID: 10769355 DOI: 10.1590/s0034-89102000000100004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 11/21/2022] Open
Abstract
INTRODUCTION The study is part of a project intended to retrieve information about the serology of the American trypanosomiasis in the state of São Paulo, Brazil, during the period when there was a state effort to control the vector. Data from the municipality of Taquarituba, administrative region of Sorocaba, which was then important in the epidemiology of Chagas disease in that region, were analyzed. Despite the government efforts started in the 1950s, domiciliary triatomines were still being captured in that region during the 1970s. METHODS Population samples were selected from five localities of Taquarituba. Age, sex, birthplace, and time of residence in the house being occupied at the time of the interview, were recorded. It is used Probit analysis to assess a possible relationship between age and seropositivity, the latter taken as indicative of the risk of transmission. RESULTS Blood from Taquarituba native people represented 62.9% of the samples examined (n = 2.784) and 62.4% of all seropositives (n = 380). Overall proportion of seropositives was 13.6% with no significant difference between genders (p = 0.538). Children under 6 years of age were not seropovitive, Seropositivity increased from 2.7% in the age group 6-9 years to 30.6% in the age group 30-39 years. By using probit analysis, an age-seropositivity relationship was found within these groups. CONCLUSIONS The results of serological tests pointed to an association between the actions taken against Triatoma infestans and the decline and eventual control of the transmission of Chagas disease in the late 1960s.
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Affiliation(s)
- M E Carvalho
- Laboratório de Soroepidemiologia da Superintendência de Controle de Endemias (SUCEN), Secretaria de Estado da Saúde de São Paulo, São Paulo, SP, Brasil.
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18
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Abstract
Our study is based on the examination of 2,000 aortic valves obtained from fresh cadavers (1,499 males, 501 females) at the Institute of Forensic Medicine in Rio de Janeiro. We discovered 13 valves having two leaflets, giving a prevalence of 0.65%, much lower than generally reported in the literature. All 13 valves were from males, 10 from whites, three from mulattos, and none from blacks. Special attention was given to the raphe and the leaflets, the calcification of which can lead to stenosis. The only valves with normal texture and flexibility were two obtained from children less than one year old. All the other valves were thickened, and five of them had some degree of calcification. Six valves were judged to be functioning normally, while 7 valves were abnormal, 5 being stenotic and two showing evidence of insufficiency. The insufficiency in one was due to endocarditis, but in the other was due to redundancy of the leaflets. The only other cardiac anomaly discovered in these 13 cases was one patient with aortic coarctation. Bifoliate aortic valve, therefore, is probably the most common cardiac anomaly, although its prevalence as discovered in Brazil is lower than that reported in the literature. It affects mainly white males. After the fourth decade of life, most valves present some thickening, with stenosis being the most common complication. As is well recognised, infective endocarditis and aortic insufficiency are the other frequent complications. It is in general, nonetheless, an isolated anomaly.
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Affiliation(s)
- H M Pauperio
- Division of Paediatric Cardiology, Socor and Felicio Rocho Hospital, Belo Horizonte MG, Brazil.
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19
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Abstract
Giardia duodenalis cysts obtained from fresh fecal samples, fecal samples kept under refrigeration and fecal samples treated with formalin were studied as to their floatability on sucrose solutions with the following specific gravities: 1,040 kg/m3; 1,050 kg/m3; 1, 060 kg/m3; 1,070 kg/m3; 1,080 kg/m3; 1,090 kg/m3; 1,100 kgm3; 1,150 kg/m3; 1,200 kg/m3; and 1,250 kg/m3, contained within counting-chambers 0.17 mm high. Cysts that floated on and those settled down as sediments were counted, and had their percentages estimated. Sucrose solutions of 1,200 kg/m3 specific gravity (the average specific gravity of diluting liquids employed in floatation techniques) caused to float 77.7%, 78.4% and 6.6% of the G. duodenalis cysts obtained, respectively, from fresh fecal samples, fecal samples kept under refrigeration, and fecal samples treated with formalin. Cysts obtained both from fresh fecal samples and fecal samples kept under refrigeration presented similar results concerning floatability. It was observed, however, that the treatment of feces with formalin diminished the cysts floatability under the various specific gravities studied. This results should influence, the recommendations for transport and storage of fecal samples used for parasitological coproscopy.
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Affiliation(s)
- M d Moitinho
- Departamento de Análises Clínicas, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brasil.
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20
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Fonseca MT, Camargos PA, Ferreira CS, Filogônio CB, Pitchon R, Viotti VN, Maciel PE, Castro TA. Interobserver agreement in assessing plain radiographs of maxillary sinus. Int J Pediatr Otorhinolaryngol 1998; 45:41-6. [PMID: 9804018 DOI: 10.1016/s0165-5876(98)00085-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Interrater agreement of six observers in interpreting maxillary sinus plain X-ray films was assessed. Patients aged 1-15 years old were enrolled and X-rays in the Caldwell and Waters's views were requested to confirm diagnosis of sinusitis or after antimicrobial therapy for a pre-existing sinusitis. One-hundred and one pairs of maxillary sinus radiographs from 101 patients were submitted to an independent and blind interpretation by three radiologists and three pediatricians. Each maxillary sinus was separately analyzed. Kappa statistic was used to measure interobserver agreement. A fair degree of agreement among the six raters was found on analyzing these films: 0.39 (95% CI, 0.36-0.41) for the right maxillary sinus and 0.37 (95% CI, 0.34-0.39) for the left one. These results stress literature data on the limits of plain radiographs for diagnosing maxillary sinusitis. The necessity of knowing the clinical findings while interpreting the exams also was depicted.
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Affiliation(s)
- M T Fonseca
- Department of Pediatrics, School of Medicine, Federal University of Minas Gerais, Brazil
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21
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Camargos PA, Guimarães MD, Ferreira CS. Benzathine penicillin for unilateral lobar or segmental infiltrates presumptively caused by Streptococcus pneumoniae in children 2-12 years old. J Trop Pediatr 1997; 43:353-60. [PMID: 9476458 DOI: 10.1093/tropej/43.6.353] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A randomized controlled study was carried out to assess the efficacy of a single dose of benzathine penicillin for treating children 2-12 years old with presumed S. pneumoniae pneumonia. One-hundred-and-seventy-six children screened at self-referral pediatric emergency services in Belo Horizonte, Brazil, were randomized to only one injection of benzathine penicillin (n = 93, case-group) or a 7-day procaine penicillin regimen (n = 83, control-group), upon diagnosis of pneumococcal pneumonia based on clinical and radiological characteristics. Follow-up was carried out on the second day after treatment and around the 7th and/or 14th day after treatment allocation. No statistical significant difference was found for sociodemographic, clinical, laboratory or radiographic characteristics among the two groups. Evident or total radiographic clearing was demonstrated for 92.3 and 95.1 per cent of the benzathine penicillin and procaine penicillin groups, respectively (P = 0.54). Benzathine penicillin may be considered an alternative to classic regimens for treating pneumonia due to sensitive strains of S. pneumoniae among children 2-12 years old. Other benefits are its lower cost, better compliance and low rates of adverse reactions.
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Affiliation(s)
- P A Camargos
- Department of Pediatrics, School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil
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22
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Schumaker TT, Mori CM, Ferreira CS. Experimental infestation of Gallus gallus with Ornithodoros (Alectorobius) amblus (Ixodoidea: Argasidae). J Med Entomol 1997; 34:521-526. [PMID: 9379456 DOI: 10.1093/jmedent/34.5.521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ornithodoros (Alectorobius) amblus Chamberlin 1920 specimens were collected from a seagull (Larus spp.) nest in northern Chile. This reports the occurrence of this species outside Peru. The biology of 79 specimens reared under laboratory conditions at 27 degrees C, 75-80% RH, and total darkness was determined. A 13% mortality rate from larval to adult was observed. Larval ticks were fed on chicks, Gallus gallus domesticus; and nymphs and adults were fed on chickens. We recorded the number of eggs per female per gonotrophic cycle and the mean duration of the periods of preoviposition, oviposition, and incubation. The total duration of their life cycle ranged from 111 to 239 d, depending on the number of molts. Males were found after the 4th molt, and after the 5th molt the proportion of females was greater than that of males or remaining nymphs. The feeding period of larvae was 4-6 d, N1 nymphs do not feed. The N2-N6 nymphs, males and females, had a 10- to 60-min feeding period. From N2 on, there was emission of coxal fluid while on the host and during or immediately after feeding.
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Abstract
We estimated the proportion of seropositivity for infection with Trypanosoma cruzi (Chagas' disease) in a sample of the rural population of the Province of Nasca, Department of Ica, southwestern Peru. Although Triatoma infestans, the only vector species identified in the Department of Ica, is often found in domestic environments, data of the extent of human infection with T. cruzi are scant. This study comprised 446 houses, known to be infested with triatomines, distributed in 19 rural localities. While visiting those houses we collected filter paper bloodspots from 864 occupants (of both sexes, aged one year or over). By means of the indirect fluorescent antibody test (IFAT), we detected anti-T. cruzi IgG antibodies in samples from 178 individuals (20.6%). Seropositivity was significantly more frequent in females (23.8%) than in males (17.5%). Among the 410 individuals in the 1- to 10-year-old age group (47.5% of the population sample), 85 (20.7%) were found seropositive, which is indicative of an early acquisition of the infection. Within this group no significant differences in seropositivity were associated with sex.
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Affiliation(s)
- H M Acosta
- Universidad Nacional Mayor de San Marcos, Perú
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24
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Ferreira MU, Cardoso MA, Santos AL, Ferreira CS, Szarfarc SC. Rapid epidemiologic assessment of breastfeeding practices: probit analysis of current status data. J Trop Pediatr 1996; 42:50-3. [PMID: 8820622 DOI: 10.1093/tropej/42.1.50] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We describe the use of probit analysis to estimate breastfeeding indicators from current status epidemiological data. A health centre-based sample of 2411 children aged 0-1 year was investigated in Santo Andre, a large town in the Metropolitan Area of Sao Paulo, southeastern Brazil. Mothers were interviewed during routine pediatric consultations and asked about their current infant feeding practices. Probit regressions were calculated by a public-domain microcomputer programme written by one of us. The median duration of total (i.e. exclusive plus partial) breastfeeding in this children's sample, estimated as 108.8 days (95 per cent confidence interval: 95.5-123.2 days), is close to that recently reported in the city of Sao Paulo and nearby towns. However, the median duration of exclusive breastfeeding (28.9 days, 95 per cent CI: 17.9-38.3 days) is rather short when compared to recent estimates from this same region. Despite the nationwide efforts for promotion of exclusive breastfeeding, only 14 per cent (95 per cent CI: 12.3-17 per cent) of the infants were still being exclusively breastfed by 120 days of age. Therefore, a key feature of breastfeeding practices in this population sample, namely, the early introduction of supplementary foods, was identified by using simplified methods of data collection and analysis. This communication suggests that probit analysis of current status data may be further explored as a method for rapid epidemiologic assessment of breastfeeding practices.
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Affiliation(s)
- M U Ferreira
- Departamento de Parasitologia, Instituto de Ciencias Biomedicas da Universidade de Sao Paulo, Brazil
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25
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Camargos PA, Ferreira CS. On round pneumonia in children. Pediatr Pulmonol 1995; 20:194-5. [PMID: 8545174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Rocha MO, Rocha RL, Pedroso ER, Greco DB, Ferreira CS, Lambertucci JR, Katz N, Rocha RS, Rezende DF, Neves J. Pulmonary manifestations in the initial phase of schistosomiasis mansoni. Rev Inst Med Trop Sao Paulo 1995; 37:311-8. [PMID: 8599059 DOI: 10.1590/s0036-46651995000400005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 01/31/2023] Open
Abstract
The clinical and radiological pulmonary manifestations in the initial phase of schistosomiasis mansoni were studied in thirty previously healthy individuals who were simultaneously infected. The findings were compared with those concerning a control group and related to possible pathogenetic factors. The respiratory manifestations were of light or of moderate intensity, the dry cough being the most common symptom. The significant radiological alterations were: thickening of bronchial walls and beaded micronodulation, predominantly localized in the lower pulmonary fields. It was observed significant association between wheezing and IgE levels, estimated by the area of immediate intradermal reaction, as well as between the number of blood eosinophils and the occurrence of radiological changes. Moreover, there was correlation between the worm burden and the presence of wheezing, thoracic pain and beaded micronodulation. Thus, the clinical and radiological pulmonary manifestations described are significant part of the initial phase of schistosomiasis mansoni and present the worm burden, eosinophilia and levels of IgE as probable pathogenetic factors.
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Affiliation(s)
- M O Rocha
- Medical School, Federal University of Minas Gerais, Belo Horizonte, Brasil
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27
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Affiliation(s)
- M U Ferreira
- Department of Parasitology, University of São Paulo, Brazil
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28
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Ferreira CS, Ferreira MU, Nogueira MR. The prevalence of infection by intestinal parasites in an urban slum in São Paulo, Brazil. J Trop Med Hyg 1994; 97:121-7. [PMID: 8170003] [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] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Sedimentation parasitological examinations were performed in stool specimens from a random household-based sample of 407 dwellers, all age groups being represented, in a slum of São Paulo, south-eastern Brazil. Intestinal parasites were detected in 45.7% of the specimens. The most prevalent parasites in this population were Ascaris lumbricoides (23.8%) and Trichuris trichiura (17.2%); only 17 individuals (4.2%) harboured Giardia duodenalis and 6 (1.5%) harboured Entamoeba histolytica. Taenia and hookworm eggs were not found. Simultaneous infection by A. lumbricoides and T. trichiura was diagnosed in 34 subjects (8.4%). The prevalence rates of infection by A. lumbricoides and T. trichiura (including those of mixed infections by both species) were highest among children aged 2-12 years. In samples positive for A. lumbricoides and/or T. trichiura, egg counts were done on Kato's thick smears and the results expressed as eggs per gram faeces (e.p.g.). The mean intensity of infection (measured as e.p.g.) in A. lumbricoides-infected subjects was highest among children aged 6-12 years and young adults under 25 years, while in T. trichiura-infected subjects the highest egg counts were observed in children aged 2-12 years. The frequency distributions of eggs of both nematodes passed by the host population were overdispersed. Moreover, a strong positive correlation (P < 0.0001) was observed between counts of eggs of both species passed by the same hosts.
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Affiliation(s)
- C S Ferreira
- Department of Parasitology, University of São Paulo, Brazil
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29
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Moitinho MDL, Ferreira CS. [Evaluation of a technique of sedimentation in tubes]. Rev Inst Med Trop Sao Paulo 1994; 36:153-6. [PMID: 7997791] [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: 01/28/2023] Open
Abstract
The efficiency of sedimentation in test tubes for the detection of eggs of Ancylostomidae, Trichuris trichiura and Ascaris lumbricoides was tested in 80 mm-high columns of fecal suspensions. Dilutions of 2.0%, 1.5% and 1.0% were tested by using samples containing, respectively, 12.5, 25.0, 50.0, 100.0, 150.0 and 200.0 eggs per gram (epg) of each helminth under study. Efficiency was evaluated in terms of frequency of positive results and eggs per slide of the sediment (0.078 ml). Both the frequencies of positive results and egg counts per slide increased with epg values, but were not apparently dependent from suspension dilutions within the range assessed. Sediments of 1.0% fecal suspensions were positive in 80.0% or more of the cases for epg values of 150.0. It is inferred that dilution values are not critical. Thus, it is not necessary to determine fecal weights or volumes instrumentally. Considering overall results, it may be concluded that 1.0% fecal dilutions should be recommended for best results both in terms transparency of the preparations and chances of recovering eggs, particularly when egg counts are low.
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Affiliation(s)
- M da L Moitinho
- Departamento de Análises Clínicas, Universidade Estadual de Maringá, Paraná, Brasil
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Ferreira MU, Ferreira CS. Malaria sporozoite rates in Anopheles mosquitoes: theoretical comparability of salivary gland dissection with the ELISA detection method. Med Vet Entomol 1993; 7:304-306. [PMID: 8369570 DOI: 10.1111/j.1365-2915.1993.tb00695.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- M U Ferreira
- Department of Parasitology, University of Săo Paulo, Brazil
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Wünsch Filho V, Settimi MM, Ferreira CS, do Carmo JC, Santos UP, Martarello NA, Costa DF. Sistema de informação para a ação: subsídios para a atuação prática dos programas de saúde dos trabalhadores a nível local. CAD SAUDE PUBLICA 1993; 9:136-48. [PMID: 15448834 DOI: 10.1590/s0102-311x1993000200004] [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] [Indexed: 11/22/2022] Open
Abstract
Nas últimas décadas o Brasil transformou-se em uma sociedade industrializada. A partir da perspectiva epidemiológica e considerando as mudanças que estão ocorrendo a população brasileira, particularmente nos aspectos da transição demográfica, discute-se neste trabalho a necessidade de repensar a abrangência e prioridade do sistema de vigilância epidemiológica no país. O estudo avalia o sistema de informação para a ação de acidentes do trabalho a nível local, implantado no Programa de Saúde dos Trabalhadores do SUDS-R-6 (Mandaqui), tendo por base os dados de uma empresa metalúrgica da região que o sistema identificava como apresentando um processo de produção com alto risco de acidentes. A participação dos trabalhadores acidentados na discussão sobre os riscos ambientais e processo de trabalho, permitiu esclarecer a multicausalidade envolvida nos acidentes ocorridos nesta empresa. É destacada a importância da participação dos trabalhadores organizados - através de seus sindicatos, nas ações de controle dos acidentes. Embora, nem sempre essa participação organizada seja possível, o setor saúde deve buscar formas de atuação que resgatem a experiência concreta dos trabalhadores.
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Abstract
This study seeks, for the first time, to identify the sick building syndrome in Brazil. The study population consisted of 312 bank-clerks distributed in two closed buildings situated in S. Paulo city, Brazil. Data were collected by questionnaire, the design was cross-sectional and analysis made by logistic regression. Female, job satisfaction and inappropriate temperature were related to general symptoms. Female and inappropriate temperature were related to mucus membrane symptoms. Job satisfaction was related to absenteeism.
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Affiliation(s)
- U P Santos
- Departamento de Epidemiologia da Faculdade de Saúde Pública da USP, SP, Brasil
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33
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Moitinho MDL, Ferreira CS. [The evaluation of the specific gravity of Giardia duodenalis and Entamoeba coli cysts]. Rev Inst Med Trop Sao Paulo 1992; 34:395-7. [PMID: 1342101] [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: 12/26/2022] Open
Abstract
Cysts of Giardia duodenalis and Entamoeba coli were observed as for floatability in sucrose solutions of different specific gravity, contained in counting-chambers of 0.17 mm height. The cysts that floated and those that sedimented were counted and then calculated the respective percentage. Floatability differences of the cysts of each species were not considerable. Solutions of specific gravity 1,200 kg/m3 made 88.49% of G. duodenalis cysts and 95.71% of E. coli cysts float. The greater values of floatability were associated to specific gravity 1,250 kg/m3 and were 89.15% and 98.59% for cysts of G. duodenalis and E. coli, respectively.
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Affiliation(s)
- M da L Moitinho
- Departamento de Análises Clínicas, Universidade Estadual de Maringá, Paraná, Brasil
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34
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35
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Abstract
Gravity sedimentation parasitological examinations were performed in stool samples from 111 Karitiana Indians from Rondônia State, Brazilian Amazon Basin. Intestinal parasites were found in 43 samples (38.7%). Ascaris lumbricoides was the most prevalent helminth species (18.9%). Egg counts in samples positive for Ascaris suggested an overdispersed distribution of worm burdens in the host population. Age-distribution pattern of intestinal parasites among Karitiana Indians was found to be rather unusual: the highest prevalence (60.0%) was detected in the 12- to 16-year-old age group.
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Affiliation(s)
- J O Ferrari
- Fundação Nacional do Indio (FUNAI), Porto Velho, RO, Brazil
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36
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Abstract
A sedimentation technique is described, in which a fecal suspension is placed on top of an aqueous sucrose solution of specific gravity 1.015 g/cm3. Using 100 by 15 mm test tubes, duplicate gravity sedimentation experiments were made using homogenized fecal suspensions (single-columns) and fecal suspensions placed on top of clear columns (double-columns). Egg and cyst counts, and turbidity determinations were made in the sediments obtained after definite time intervals. Most Ascaris lumbricoides, Trichuris trichiura and Ancylostomidae eggs sedimented within 20 minutes in single-and between 30 and 60 minutes in double-columns. Giardia duodenalis cysts required longer periods to sediment in double-than in single-columns; after 180 minutes (the maximum period of observation), double-column sediments produced 60.0% of the counts of single-columns. Double-column sediments were consistently less turbid than single-column ones.
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Affiliation(s)
- M da L Moitinho
- Departamento de Análises Clínicas, Universidade Estadual de Maringá, Paraná, Brasil
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37
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De Carvalho ME, Ferreira MU, De Souza MR, Ninomia RT, Matos GF, Camargo LM, Ferreira CS. Malaria seroepidemiology: comparison between indirect fluorescent antibody test and enzyme immunoassay using bloodspot eluates. Mem Inst Oswaldo Cruz 1992; 87:205-8. [PMID: 1308565 DOI: 10.1590/s0074-02761992000200006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 12/26/2022] Open
Abstract
Blood sampling on filter paper is a current practice in malaria seroepidemiological studies by indirect fluorescent antibody test (IFAT). There is, however, scant comparative information about the use of bloodspot eluates for detection of malarial IgG antibodies simultaneously by IFAT and enzyme immunoassay (ELISA). Here we report data obtained by both serological methods done on 219 bloodspot eluate samples collected in a rural community in Brazilian Amazon Basin (Alto Paraíso, Ariquemes municipality) where malaria is endemic. Plasmodium falciparum and P. vivax thick smear antigens were used in the IFAT; a detergent-soluble P. falciparum antigen was prepared for ELISA. Substantial agreement of results (Kappa coefficient k = 0.686) was observed when P. falciparum antigen was used in both tests, and IFAT titers were found to be strongly correlated to ELISA antibody units (Spearman correlation coefficient rs = 0.818, p < 0.001). Only moderate agreement (k = 0.467) between IFAT with P. vivax antigen and ELISA with P. falciparum antigen was observed. Spearman correlation coefficient value between quantitative results (IFAT titers and ELISA antibody units) in this case was numerically lower (rs = 0.540, p < 0.0001). Our results suggest that, with P. falciparum antigen, both IFAT and ELISA performed on bloodspot eluates are equivalent for seroepidemiological purposes.
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38
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Ferreira MU, Stolf AM, Ferreira CS, Katzin AM, Ramos AM, Kimura E, Di Santi SM, Camargo LM. Using a microplate reader to quantify dot immunobinding assays. Mem Inst Oswaldo Cruz 1991; 86:467-8. [PMID: 1842439 DOI: 10.1590/s0074-02761991000400017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- M U Ferreira
- Departamento de Parasitologia, ICB USP, São Paulo, Brasil
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39
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Abstract
Brine flotation and gravity sedimentation coproscopical examinations were performed in stool samples from 69 of the 147 Iaualapiti Indians of the Xingu Park, Mato Grosso State, Brazil. Intestinal parasites were present in 89.9% of the population examined. High rates of prevalence were found for some parasite species: Ancylostomidae, 82.6%; Enterobius vermicularis, 26.1%; Ascaris lumbricoides, 20.3%; and Entamoeba coli, 68.1%. Infection by Trichuris trichiura, Schistosoma mansoni, Taenia spp. and Hymenolepis nana was not detected. Helminth's prevalence in children aged one year or less was comparatively low (33.3%). Quantitative coproscopy was done in positive samples for Ascaris and Ancylostomidae and the results expressed in eggs per gram of feces (EPG). Quantitative results revealed that worm burdens are very low and overdispersed in this Indian tribe, a previously unreported fact.
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Affiliation(s)
- C S Ferreira
- Departamento de Parasitologia, Universidade de São Paulo, Brasil
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40
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Abstract
The efficiency of the use of a wire loop for the removal of floating parasitic elements was investigated. The quantity of elements removed by each successive loopful was confronted with a logarithmic model which indicated that each loopful carried about 30% of the remaining floating parasitic elements. It was estimated that the first five loopfuls carried a total of 83% of the floating parasitic elements, being this adequate procedure for the method under investigation.
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41
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Soares CM, Urmenyi TP, Ferreira CS, de Carvalho EF, Carvalho JF, Rodinelli E, de Castro FT. Thermal and developmental regulation of gene expression in Trypanosoma cruzi. Mem Inst Oswaldo Cruz 1988; 83 Suppl 1:337-44. [PMID: 3075682 DOI: 10.1590/s0074-02761988000500019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- C M Soares
- Instituto de Biofisica Carlos Chagas Filho, UFRJ, Rio de Janeiro, Brasil
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42
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Pedroso ER, Lambertucci JR, Greco DB, Rocha ODC, Ferreira CS, Raso P. Pulmonary schistosomiasis mansoni: post-treatment pulmonary clinical-radiological alterations in patients in the chronic phase: a double-blind study. Trans R Soc Trop Med Hyg 1987; 81:778-81. [PMID: 3130687 DOI: 10.1016/0035-9203(87)90030-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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: 01/04/2023] Open
Abstract
A double blind trial was set up to study the pulmonary effects of specific treatment with oxamniquine of 40 patients with chronic schistosomiasis mansoni. Radiological alterations characterized by bronchopneumonitis were seen in 17.5% of the patients after treatment, but in none of the placebo group; non-migratory condensation occurred between 25 and 72 h after treatment, with a mean duration of 7 d. 86% of the patients showed spontaneous healing with no radiological sequelae after 30 d of follow-up. Slight pulmonary clinical manifestations without any functional repercussions were also seen. The alterations were probably related to the host-parasite interaction, and the lesions may have been caused by deposition of immune complexes in the lungs with local activation of complement.
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Affiliation(s)
- E R Pedroso
- Departamento de Clinica Médica, Faculdade de Medicina da Universidade Federal de Minas Gerais, Brazil
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43
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Pedroso ER, Lambertucci JR, Rocha MO, Greco DB, Ferreira CS, Rocha RS, Katz N. Bowel x-ray alterations in acute human schistosomiasis. Rev Soc Bras Med Trop 1987; 20:159-62. [PMID: 3148976 DOI: 10.1590/s0037-86821987000300006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A radiological study of the small intestine of 17 untreated patients in the acute phase ofschistosomiasis was performed. Twelve patients (70% of total) had alterations: nine had clear-cut thickening of the duodenal and jejunal folds, one flocculation, one fragmentation and one thickening of mucosae, flocculation and fragmentation of the barium column. There was no correlation of the gastrointestinal symptomatology (vomiting, diarrhoea, dysentery, hepatomegaly) neither with the parasitological load nor with the x-ray alterations.
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Greco DB, Pedroso ER, Lambertucci JR, Rocha MO, Coelho PM, Raso P, Ferreira CS. Pulmonary involvement in schistosomiasis mansoni. Mem Inst Oswaldo Cruz 1987; 82 Suppl 4:221-7. [PMID: 2978271 DOI: 10.1590/s0074-02761987000800040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The post-treatment pulmonary alterations were evaluated in patients (Study 1) and in mice (Study 2) infected with Schistosoma mansoni. Study 1: the patients were examined pre and post-treatment (with ora oxamniquine) and the following exams were performed: sputum for eosinophils and chest x-ray. Study 2: four groups of mice (total = 64) were studied; Group I (infected and treated with oxamniquine); II (infected and not treated); III (not infected and treated) and IV (not infected and not treated). All were x-rayed to check for pulmonary abnormalities pre and post-treatment and lung specimens were studied by optical microscopy and immunofluorescence. We have found abnormalities in the parameters checked in both studies and the results suggest an immunological reaction, probably due to deposition of immune complexes in the lungs, with subsequent activation of the complement system. The experimental study showed that the alterations are not dependent of the presence of eggs and/or worms of S. mansoni in the lungs, thus corroborating the hypothesis of deposition of circulating material.
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Affiliation(s)
- D B Greco
- Núcleo de Estudos sobre Esquistossomose, Faculdade de Medicina e Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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45
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Boechat MI, Gold RH, Gilsanz V, Ferreira CS. Radiological aspects of South American blastomycosis in children. Ann Radiol (Paris) 1984; 27:247-52. [PMID: 6721432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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46
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Ferreira CS, Lopes ER, Chapadeiro E, de Oliveira Almeida H, de Souza WF, da Silva Neto IJ. [Post-mortem coronary angiography in chronic Chagas carditis, Anatomo-radiologic correlation]. Arq Bras Cardiol 1980; 34:81-6. [PMID: 6773509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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47
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Maspes V, Ferreira CS, Tamigaki M. [Changes produced by blood transfusions in the egg output of hookworms]. Rev Inst Med Trop Sao Paulo 1978; 20:329-33. [PMID: 571617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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48
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Abstract
Propõem-se modificações de procedimentos rotineiros de reações de imunofluorescência indireta. A eluição das amostras de sangue dessecado contidas em papel-filtro é feita em placas ("godets") com tampas. Alças de níquel-cromo substituem pipetas capilares para a transferência de amostras de eluatos para as lâminas de microscopia. Propõe-se uma técnica rápida e eficiente de lavagem das preparações.
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49
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Ferreira CS, Carvalho ME. [Clearing of fecal smears]. Rev Saude Publica 1972; 6:19-23. [PMID: 4680257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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50
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Dannemann A, Ferreira CS, Falci F. [Non-parasitic hepatic cysts]. Hospital (Rio J) 1970; 78:55-68. [PMID: 5312453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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