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Aguilar Ticona JP, Xiao M, Li D, Nery JN, Hitchings M, Andrade Belitardo EMM, Fofana MO, Victoriano R, Cruz JS, de Moraes L, Strobel IM, Silva JJ, Sena do Aragão Filho A, Ribeiro GS, Reis MG, Costa F, Khouri R, Ko AI, Cummings DAT. Corrigendum to "Extensive transmission of SARS-CoV-2 BQ.1* variant in a population with high levels of hybrid immunity: A prevalence survey" [International Journal of Infectious Diseases 139 (2024) 159-167]. Int J Infect Dis 2024; 141:106964. [PMID: 38452689 PMCID: PMC10927614 DOI: 10.1016/j.ijid.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024] Open
Affiliation(s)
- Juan P Aguilar Ticona
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brazil; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States.
| | - Meng Xiao
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States; Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Dan Li
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States; Public Health Emergency Center, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jr Nivison Nery
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brazil; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Matt Hitchings
- Department of Biostatistics, University of Florida, Gainesville, United States; Emerging Pathogens Institute, University of Florida, Gainesville, United States
| | | | - Mariam O Fofana
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Renato Victoriano
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Jaqueline S Cruz
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Laise de Moraes
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Icaro Morais Strobel
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Jessica Jesus Silva
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | | | - Guilherme S Ribeiro
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Mitermayer G Reis
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Federico Costa
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brazil; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Ricardo Khouri
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Albert I Ko
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Derek A T Cummings
- Department of Biology, University of Florida, Gainesville, United States; Emerging Pathogens Institute, University of Florida, Gainesville, United States
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Aguilar Ticona JP, Xiao M, Li D, Nery N, Hitchings M, Belitardo EMMA, Fofana MO, Victoriano R, Cruz JS, de Moraes L, Strobel IM, Silva JJ, Sena do Aragão Filho A, Ribeiro GS, Reis MG, Costa F, Khouri R, Ko AI, Cummings DAT. Extensive transmission of SARS-CoV-2 BQ.1* variant in a population with high levels of hybrid immunity: A prevalence survey. Int J Infect Dis 2024; 139:159-167. [PMID: 38070701 PMCID: PMC10784150 DOI: 10.1016/j.ijid.2023.11.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 01/01/2024] Open
Abstract
OBJECTIVES The SARS-CoV-2 BQ.1* variant rapidly spread globally in late 2022, posing a challenge due to its increased immune evasion. METHODS We conducted a prevalence survey in Brazil from November 16 to December 22, 2022, as part of a cohort study. We conducted interviews and collected nasal samples for reverse transcription-polymerase chain reaction (RT-PCR) testing and whole-genome sequencing. Cumulative incidence was estimated using RT-PCR positivity, cycle threshold values, and external data on the dynamics of RT-PCR positivity following infection. RESULTS Among 535 participants, 54% had documented SARS-CoV-2 exposure before this outbreak and 74% had received COVID-19 vaccination. In this study, 14.8% tested positive for SARS-CoV-2, with BQ.1* identified in 90.7% of cases. Using case data and cycle threshold values, cumulative incidence was estimated at 56% (95% confidence interval, 36-88%). Of the 79 positive participants, 48.1% had a symptomatic illness, with a lower proportion fulfilling the World Health Organization COVID-19 case definition compared to prior Omicron waves. No participants required medical attention. CONCLUSIONS Despite high population-level hybrid immunity, the BQ.1* variant attacked 56% of our population. Lower disease severity was associated with BQ.1* compared to prior Omicron variants. Hybrid immunity may provide protection against future SARS-CoV-2 variants but in this case was not able to prevent widespread transmission.
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Affiliation(s)
- Juan P Aguilar Ticona
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brazil; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States.
| | - Meng Xiao
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States; Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Dan Li
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States; Public Health Emergency Center, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Nivison Nery
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brazil; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Matt Hitchings
- Department of Biostatistics, University of Florida, Gainesville, United States; Emerging Pathogens Institute, University of Florida, Gainesville, United States
| | | | - Mariam O Fofana
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Renato Victoriano
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Jaqueline S Cruz
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Laise de Moraes
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Icaro Morais Strobel
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Jessica Jesus Silva
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | | | - Guilherme S Ribeiro
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Mitermayer G Reis
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Federico Costa
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, Brazil; Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Ricardo Khouri
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil
| | - Albert I Ko
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, United States
| | - Derek A T Cummings
- Department of Biology, University of Florida, Gainesville, United States; Emerging Pathogens Institute, University of Florida, Gainesville, United States
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Ono LT, Silva JJ, Doná S, Martins LM, Iamanaka BT, Fungaro MHP, Pitt JI, Taniwaki MH. Aspergillus section Flavi and aflatoxins in Brazilian cassava (Manihot esculenta Crantz) and products. Mycotoxin Res 2021; 37:221-228. [PMID: 34036551 DOI: 10.1007/s12550-021-00430-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 11/27/2020] [Revised: 05/04/2021] [Accepted: 05/11/2021] [Indexed: 11/28/2022]
Abstract
Aflatoxins are carcinogenic compounds produced by some species of Aspergillus, especially those belonging to Aspergillus section Flavi. Their occurrence in food may start in the field, in the post-harvest, or during storage due to inadequate handling and storage. Because cassava is a staple food for a high percentage of the Brazilian population, we evaluated the presence of aflatoxin-producing species in cassava tubers, cassava products (cassava flour, cassava starch, sour starch, and tapioca flour), and in soil samples collected from cassava fields. In addition, the levels of aflatoxin contamination in cassava products were quantified. A total of 101 samples were analyzed, and 45 strains of Aspergillus section Flavi were isolated. Among the identified species, Aspergillus flavus, Aspergillus arachidicola, Aspergillus novoparasiticus, and Aspergillus parasiticus were found. The majority of strains (73.3%) tested for their aflatoxin-producing ability in synthetic media was positive. Despite that, cassava and cassava products were essentially free of aflatoxins, and only one sample of cassava flour contained traces of AFB1 (0.35 μg/kg).
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Affiliation(s)
- L T Ono
- Institute of Food Technology (Ital), Campinas, SP, Brazil
| | - J J Silva
- Institute of Food Technology (Ital), Campinas, SP, Brazil
| | - S Doná
- Paulista Agribusiness Technology Agency (APTA), Technological Development Center of Agribusinesses in Médio Paranapanema, Assis, SP, Brazil
| | - L M Martins
- Institute of Food Technology (Ital), Campinas, SP, Brazil
| | - B T Iamanaka
- Institute of Food Technology (Ital), Campinas, SP, Brazil
| | - M H P Fungaro
- Universidade Estadual de Londrina, Londrina, PR, Brazil
| | - J I Pitt
- Microbial Screening Technologies, Smithfield, NSW, Australia
| | - M H Taniwaki
- Institute of Food Technology (Ital), Campinas, SP, Brazil.
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Boriollo MFG, Alves VE, Silva TA, Silva JJ, Barros GBS, Dias CTS, Höfling JF, Oliveira NMS. Decrease of the DXR-induced genotoxicity and nongenotoxic effects of Theobroma cacao revealed by micronucleus assay. BRAZ J BIOL 2020; 81:268-277. [PMID: 32696851 DOI: 10.1590/1519-6984.223687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 11/04/2019] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the genotoxicity of lyophilized glycolic extract of Theobroma cacao Linné seeds (TCL), using the micronucleus assay in bone marrow of mice. The interaction between TCL and doxorubicin (DXR) was also analyzed. Experimental groups were evaluated 24-48 h after treatment with N-Nitroso-N-ethylurea (NEU: 50 mg/kg), DXR (5 mg/kg), NaCl (145 mM), TCL (0.5-2 g/kg), and TCL (2 g/kg) in combination with DXR (antigenotoxic assays). Analysis of micronucleated polychromatic erythrocytes (MNPCEs) showed no significant differences between all the treatment doses of TCL and NaCl control. Mice experimentally treated with DXR and NEU significantly induced MNPCEs. However, a significant reduction of MNPCEs was also observed when TCL was administered in combination with the chemotherapeutic agent DXR. The analysis of the PCE/NCE ratio revealed no significant differences between the NaCl control, all doses of TCL, and DXR. However, there were significant differences in the PCE/NCE ratio between positive NEU control and all other treatments. The PCE/NCE ratio observed after treatment with TCL and DXR showed significant differences and intermediate values to controls (NaCl and NEU). This study suggests absence of genotoxicity and cytotoxicity of TCL, regardless of dose, sex, and time. TCL reduced genotoxic effects induced by DXR, suggesting potential antigenotoxic effects.
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Affiliation(s)
- M F G Boriollo
- Laboratório de Genética Molecular, Departamento de Diagnóstico Oral, Faculdade de Odontologia de Piracicaba - FOP, Universidade Estadual de Campinas - UNICAMP, Av. Limeira, 901, Bairro Areião, CEP 13414-903, Piracicaba, SP, Brasil
| | - V E Alves
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
| | - T A Silva
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
| | - J J Silva
- Laboratório de Genética Molecular, Departamento de Diagnóstico Oral, Faculdade de Odontologia de Piracicaba - FOP, Universidade Estadual de Campinas - UNICAMP, Av. Limeira, 901, Bairro Areião, CEP 13414-903, Piracicaba, SP, Brasil
| | - G B S Barros
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
| | - C T S Dias
- Departamento de Ciências Exatas, Escola de Agricultura "Luiz de Queiroz" - ESALQ, Universidade de são Paulo - USP, Av. Pádua Dias, 11, CEP 13418-900, Piracicaba, SP, Brasil
| | - J F Höfling
- Laboratório de Genética Molecular, Departamento de Diagnóstico Oral, Faculdade de Odontologia de Piracicaba - FOP, Universidade Estadual de Campinas - UNICAMP, Av. Limeira, 901, Bairro Areião, CEP 13414-903, Piracicaba, SP, Brasil
| | - N M S Oliveira
- Laboratório de Farmacogenética e Biologia Molecular, Faculdade de Ciências Médicas, Universidade José do Rosário Vellano - UNIFENAS, Rodovia MG 179, Km 0, Campus Universitário, CEP 37132-440, Alfenas, MG, Brasil
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Bye A, Ryeng E, Silva JJ, Moreira JB, Stensvold D, Wisloff U. 4101Identification of genetic variants associated with the cardiovascular disease risk factor, low aerobic fitness - The HUNT study. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0113] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Abstract
Background: Low maximal oxygen uptake (VO2max) is a strong and independent risk factor for all-cause and cardiovascular disease (CVD) mortality. Although physical activity is a major determinant of VO2maxlevel, genetics contribution is estimated to be ∼50%.
Methods
We performed a genetic association study on 123.545 single-nucleotide polymorphisms (SNPs) and directly measured VO2max in 3470 individuals (exploration cohort). The candidate SNPs were subsequently analyzed in a separate cohort of 718 individuals (validation cohort), in addition to 7 wild-card SNPs previously associated with VO2max, but not included on the chip used in the exploration cohort. Sub-analyses were performed for each gender. In silico analysis and genotype-phenotype databases were used to predict physiological function of the SNPs.
Results
In the exploration cohort, 42 SNPs were associated with VO2max (p<5.0×10–4). Six of the candidate SNPs were also found to be associated with VO2max in the validation cohort (p<0.05, either in men, women or both), in addition to three wild-card SNPs. By using these nine SNPs we created a genetic score for inborn VO2max-level. Together, these nine SNPs explained ∼8% of the variation in VO2max, and discriminate individuals with inborn high versus low VO2max based on simultaneous carriage of multiple favorable alleles. The cumulative number of favorable SNPs correlated negatively with the presence of several CVDrisk factors, e.g. waist-circumference, visceral fat, fat %, cholesterol levels and BMI. In silico analysis indicated that several of the SNPs influence gene expression across multiple organs, including adipose tissue, skeletal muscle and heart.
Conclusion
We identified six novel genetic variants associated with VO2max, and validated three SNPs previously associated with fitness related traits.
Acknowledgement/Funding
K.G. Jebsen Foundation, the Norwegian Health Association, the Liaison Committee between the Central Norway Regional Health Authority (RHA) and NTNU
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Affiliation(s)
- A Bye
- Norwegian University of Science and Technology, Trondheim, Norway
| | - E Ryeng
- Norwegian University of Science and Technology, Trondheim, Norway
| | - J J Silva
- Norwegian University of Science and Technology, Trondheim, Norway
| | - J B Moreira
- Norwegian University of Science and Technology, Trondheim, Norway
| | - D Stensvold
- Norwegian University of Science and Technology, Trondheim, Norway
| | - U Wisloff
- Norwegian University of Science and Technology, Trondheim, Norway
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Santana-Martinez JC, Silva JJ, Dussan J. Efficacy of Lysinibacillus sphaericus against mixed-cultures of field-collected and laboratory larvae of Aedes aegypti and Culex quinquefasciatus. Bull Entomol Res 2019; 109:111-118. [PMID: 29784071 DOI: 10.1017/s0007485318000342] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Lysinibacillus sphaericus (Bacillales: Planococcaceae) is a spore-forming bacillus used for the biological control of mosquitoes (Diptera: Culicidae) due to its larvicidal activity determined by various toxins and S-layer protein produced either during sporulation or by the vegetative cell. Aedes aegypti and Culex quinquefasciatus are the vectors of arboviruses that cause tropical diseases representing a current public health problem. Both species may coexist in the same larval development sites and are susceptible to the larvicidal activity of L. sphaericus. In this study, we compared the larvicidal effects of L. sphaericus 2362 (WHO Reference strain) and native strains III(3)7 and OT4b.25 against Cx. quinquefasciatus and Ae. aegypti in single-species and mixed-culture bioassays. Findings showed that L. sphaericus spores, vegetative cells and a combination thereof possessed high larvicidal activity against Cx. quinquefasciatus larvae, whereas only the formulation of L. sphaericus vegetative cells was effective against Ae. aegypti larvae. Similar results were obtained for field-collected larvae. We propose that a formulation of vegetative cells of L. sphaericus 2362 or III(3)7 could be a good alternative to chemical insecticides for the in situ control of mixed populations of Ae. aegypti and Cx. quinquefasciatus.
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Affiliation(s)
- J C Santana-Martinez
- Departamento de Ciencias Biológicas,Centro de Investigaciones Microbiológicas (CIMIC), Universidad de los Andes,Bogotá,Colombia
| | - J J Silva
- Departamento de Ciencias Biológicas,Centro de Investigaciones Microbiológicas (CIMIC), Universidad de los Andes,Bogotá,Colombia
| | - J Dussan
- Departamento de Ciencias Biológicas,Centro de Investigaciones Microbiológicas (CIMIC), Universidad de los Andes,Bogotá,Colombia
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Montalva C, Silva JJ, Rocha LFN, Luz C, Humber RA. Characterization of Tolypocladium cylindrosporum (Hypocreales, Ophiocordycipitaceae) isolates from Brazil and their efficacy against Aedes aegypti (Diptera, Culicidae). J Appl Microbiol 2018; 126:266-276. [PMID: 30160316 DOI: 10.1111/jam.14093] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 08/16/2018] [Accepted: 08/23/2018] [Indexed: 01/03/2023]
Abstract
AIMS To survey and to characterize entomopathogenic fungi as natural enemies of mosquitoes in Central Brazil. METHODS AND RESULTS Tolypocladium cylindrosporum (Hypocreales, Ophiocordycipitaceae) was isolated for the first time in South America by using Aedes aegypti (Diptera, Culicidae) as sentinel larvae in a stagnant mosquito breeding site in a secondary tropical forest. Two isolates were morphologically and molecularly identified, and their activity tested against A. aegypti eggs, larvae and adults. CONCLUSIONS Findings emphasize the importance of T. cylindrosporum as a natural fungal antagonist of mosquitoes. SIGNIFICANCE AND IMPACT OF THE STUDY Both isolates affected larvae and adults but were less effective against eggs; both have potential for development as a mycoinsecticide especially against larvae of A. aegypti the main vector of dengue, chikungunya, Zika and urban yellow fever.
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Affiliation(s)
- C Montalva
- Laboratório de Patologia de Invertebrados, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.,Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Universidad Austral de Chile (Uach), Valdivia, Chile
| | - J J Silva
- Laboratório de Patologia de Invertebrados, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - L F N Rocha
- Laboratório de Patologia de Invertebrados, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia de Goiás, Aparecida de Goiânia, Goiás, Brazil
| | - C Luz
- Laboratório de Patologia de Invertebrados, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - R A Humber
- Laboratório de Patologia de Invertebrados, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.,USDA-ARS Emerging Pests and Pathogens Research Unit, Robert W. Holley Center for Agriculture and Health, Ithaca, NY, USA
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8
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Boriollo MFG, Silva TA, Rodrigues-Netto MF, Silva JJ, Marques MB, Dias CTS, Höfling JF, Resck MCC, Oliveira NMS. Reduction of doxorubicin-induced genotoxicity by Handroanthus impetiginosus in mouse bone marrow revealed by micronucleus assay. BRAZ J BIOL 2017; 78:1-12. [PMID: 28699970 DOI: 10.1590/1519-6984.18515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 09/20/2016] [Indexed: 11/22/2022] Open
Abstract
Handroanthus impetiginosus has long been used in traditional medicine and various studies have determined the presence of bioactive chemical compounds and potential phytotherapeutics. In this study, the genotoxicity of the lyophilized tincture of H. impetiginosus bark (THI) was evaluated in mouse bone marrow using micronucleus assays. The interaction between THI and genotoxic effects induced by the chemotherapeutic agent, doxorubicin (DXR), was also analyzed. Experimental groups were evaluated 24 to 48 h after treatment with N-nitroso-N-ethylurea (NEU; 50 mg/kg), DXR (5 mg/kg), sodium chloride (NaCl; 150 mM), and THI (0.5-2 g/kg). Antigenotoxic assays were carried out using THI (0.5 g/kg) in combination with NEU or DXR. Analysis of the micronucleated polychromatic erythrocytes (MNPCEs) indicated no significant differences between treatment doses of THI (0.5-2 g/kg) and NaCl. Polychromatic erythrocyte (PCE) to normochromatic erythrocyte (NCE) ratios did not indicate any statistical differences between DXR and THI or NaCl, but there were differences between THI and NaCl. A significant reduction in MNPCEs and PCE/NCE ratios was observed when THI was administered in combination with DXR. This study suggested the absence of THI genotoxicity that was dose-, time-, and gender-independent and the presence of moderate systemic toxicity that was dose-independent, but time- and gender-dependent. The combination of THI and DXR also suggested antigenotoxic effects, indicating that THI reduced genotoxic effects induced by chemotherapeutic agents.
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Affiliation(s)
- M F G Boriollo
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - T A Silva
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - M F Rodrigues-Netto
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - J J Silva
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - M B Marques
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - C T S Dias
- Escola de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, Brazil
| | - J F Höfling
- Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - M C C Resck
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
| | - N M S Oliveira
- Faculdade de Ciências Médicas, Universidade José do Rosário Vellano, Alfenas, MG, Brazil
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Silva JJ, Ventura MU, Silva FAC, Panizzi AR. Population dynamics of Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) on Host Plants. Neotrop Entomol 2013; 42:141-5. [PMID: 23949747 DOI: 10.1007/s13744-012-0104-2] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 11/26/2012] [Indexed: 06/02/2023]
Abstract
The stink bug Dichelops melacanthus (Dallas) has become one of the major pests of corn and wheat in Brasil, mainly after a shift from the conventional tillage system to the no tillage cultivation system. This fact may be due to the simultaneous occurrence of second planting corn with wheat cultivation, and the presence of wild hosts. This study aimed to evaluate the population dynamics of D. melacanthus on wild hosts adjacent to areas cultivated with corn, wheat, and soybean during the season and off-season of soybean cultivation. Weekly surveys were conducted in the region of Londrina, PR, Brasil from the beginning of July 2007 up to the end of June 2008 using the square meter method. Corn (Zea mays), soybean (Glycine max), tropical spiderwort (Commelina benghalensis), hairy indigo (Indigofera hirsuta), crotalaria (Crotalaria pallida), wheat (Triticum aestivum), and signal grass (Brachiaria decumbens) were identified as hosts of D. melacanthus. Signal grass was the host in which stink bug adults were found in higher numbers, while nymphs and adults were consistently collected on tropical spiderwort. Although nymphs completed their development on tropical spiderwort seeds, this host was found less suitable than soybean seeds.
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Affiliation(s)
- J J Silva
- Depto de Agronomia, Campus Universitário, Centro de Ciências Agrárias, Univ Estadual de Londrina, Londrina, PR, Brasil
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10
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Homsi C, Rodrigues MB, Silva JJ, Stump X, Morvan G. [Anomalous insertion of the pectoralis minor muscle: ultrasound findings]. J Radiol 2003; 84:1007-11. [PMID: 13679754] [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: 04/23/2023]
Abstract
PURPOSE With anomalous insertion of the pectoralis minor muscle, its distal fibers pass over the coracoid process instead of inserting on it, following sometimes a trajectory very similar to that of the coracohumeral ligament. The aim of this prospective study was to evaluate the frequency of detection of this anomalous insertion by ultrasonography. MATERIALS AND METHODS Ultrasound demonstrated the abnormal insertion of the pectoralis minor muscle by directly visualizing its fibers slipping over the coracoid process during external and internal rotation of the humerus. Three hundred and three individuals underwent ultrasound of the shoulders (64,7% female, mean age of 45 years), for a total of six hundred and six shoulders; 30% (183/606) were symptomatic. RESULTS An abnormal insertion was demonstrated in 9,57% of the examined shoulders (58/606), with a statistically significant predominance on the left side (12,2%) compared to the right side (6,9%), and of women (12,2%) compared to men (4,7%). CONCLUSION Ultrasound demonstrated an abnormal insertion of the pectoralis minor muscle in 9,57% of 606 examined shoulders. There was a female and left side predominance and no significant correlation with symptoms.
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Affiliation(s)
- C Homsi
- Services de Radiologie des Hopitaux Santa Catarina, Alemão Oswaldo Cruz et Do Coração. São Paulo, Brésil.
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11
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Abstract
Patient setup and geometrical factors can potentially lead to excessive spinal cord doses when treating lymphoma patients with matched mantle and para-aortic (PAN) fields. To ensure cord protection, partial transmission blocks are often used at the matchline. This study evaluates optimal placement of these blocks. Three patients were planned using a variety of mantle/PAN field geometries, including significantly different field lengths and isocenter vertical positions. Field matching in all cases was based on a standard gap calculation. Half-transmission blocks (HTB) were positioned on (a) both posterior fields, (b) both anterior fields, and (c) the posterior PAN field only. Doses were calculated with and without effects of setup uncertainty. HTB on both posterior fields yielded a lower maximum cord dose but slightly poorer target coverage than HTB on both anterior fields. HTB on the posterior PAN field alone resulted in a maximum cord dose similar to HTB on both anterior fields. Setup uncertainty decreased but did not eliminate the differences between block placement methods. HTB of sufficient size on both posterior fields ensures a maximum cord dose less than the prescription without significant compromise of target coverage.
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Affiliation(s)
- C E Oh
- Department of Medical Physics and Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
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12
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Rodrigues MB, Silva JJ, Homsi C, Stump XM, Lecouvet FE. Knee imaging after anterior cruciate ligament reconstruction. JBR-BTR 2001; 84:262-7. [PMID: 11817479] [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: 04/17/2023]
Abstract
An increasing number of reconstructions of the anterior cruciate ligament (ACL) are performed every year, due to both the increasing occurrence of sport related injuries and the development of diagnostic and surgical techniques. The most used surgical procedure for the torn ACL reconstruction is the use of autogenous material, most often the patellar and semitendinosus tendons. Magnetic resonance (MR) imaging and spiral-CT performed after arthrography with multiplanar reconstructions are the imaging methods of choice for post-operative evaluation of ACL ligamentoplasty. This paper provides a brief bibliographic and more extensive pictorial review of the normal evolution and possible complications after ACL repair.
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Affiliation(s)
- M B Rodrigues
- Dept Radiology, Hospital Alemão Oswaldo Cruz, São Paulo, Brazil
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13
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Silva JJ, Debergh P. Somatic embryogenesis from flower explants of cocoa (Theobroma cacao L.). Meded Rijksuniv Gent Fak Landbouwkd Toegep Biol Wet 2001; 66:31-4. [PMID: 15952427] [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: 05/02/2023]
Abstract
Two types of flower explants, staminoides and petals, were used for in vitro induction of somatic embryos in cocoa. After 14 days in culture, we observed globular structures and callus formation on both types of explants. However, the better results were obtained on staminoides: 98.3% formed callus and 86.2% somatic embryos on Murashige and Skoog (1962) medium supplemented with sucrose, coconut water, 2,4-D, kinetin and agar.
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Affiliation(s)
- J J Silva
- Plant Biotechnology Study Centre, Granma University, AP 21, Bayamo, Granma, Cuba
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14
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Silva JJ, Tsang RW, Panzarella T, Levin W, Wells W. Results of radiotherapy for epithelial skin cancer of the pinna: the Princess Margaret Hospital experience, 1982-1993. Int J Radiat Oncol Biol Phys 2000; 47:451-9. [PMID: 10802373 DOI: 10.1016/s0360-3016(00)00410-7] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.0] [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: 11/22/2022]
Abstract
PURPOSE To assess the treatment outcome, late toxicity, and prognostic factors for radiotherapy (RT) of carcinoma of the pinna. METHODS AND MATERIALS The charts of 313 patients treated between 01/82 and 12/93 were retrospectively reviewed. There were 334 lesions treated: 201 basal cell carcinoma (BCC), 122 squamous cell carcinoma (SCC), and 11 basosquamous carcinoma. RT was most commonly given by orthovoltage X-rays (278 lesions) or electrons (39 lesions). The most frequently used dose prescriptions were 35 Gy in 5 fractions (123 treatments with median field size = 4.9 cm(2)), 42. 5-45 Gy in 10 fractions (67 treatments with median field size = 10.5 cm(2)), and 50-65 Gy in 20-30 fractions (42 treatments with median field size = 81 cm(2)).2 cm. RESUL TS: The actuarial 2- and 5-year local control rates were 86.6% and 79.2 %. Multivariate analysis revealed two factors to be statistically signi ficant for increased local failure: tumor size > 2 cm (hazard ratio [HR] = 2.66, 95% confidence interval [CI] = 1.16-6.08), and a low biological effective dose (BED) (for each decrease of 5 BED units, HR = 1.76, 95% CI = 1.07-2.88). The 5-year actuarial rate of significant Grade 4 late toxicity was 7.3%. Factors statistically significant for this endpoint on univariate analysis were tumor size (p = 0.035), T-stage (p = 0.02), field size (p = 0.05), fraction size (p = 0.003), and BED (p = 0.05). CONCLUSIONS RT is an eff ctive treatment option for epithelial skin cancer of the pinna. Large t umor size and low BED were independently statistically significantly ass ociated with increased local failure. Dose-fractionation schedules usin g fraction sizes < 4 Gy may reduce the risk of necrosis and ulceration, particularly for field sizes > 5 cm2.
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Affiliation(s)
- J J Silva
- Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada.
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15
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Abstract
We used microimmunofluorescence to survey the prevalence of antibodies to Chlamydia pneumoniae in 403 serum samples from asymptomatic subjects aged 6 months to 89 y in Santiago, Chile. The results suggest that Chlamydia pneumoniae infection is endemic in Chile, with a seroprevalence of 60% which does not differ by gender.
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Affiliation(s)
- M A Martínez
- Universidad de Chile, Facultad de Medicina, Instituto de Ciencias Biomédicas, Programa de Microbiologia, Santiago
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Koifman S, Ferraz I, Viana TS, Silveira CL, Carneiro MT, Koifman RJ, Sarcinelli PN, Mattos RDC, Lima JS, Silva JJ, Moreira JC, Ferreira MDF, Fernandes C, Bulcão AC. Cancer cluster among young Indian adults living near power transmission lines in Bom Jesus do Tocantins, Pará, brazil. CAD SAUDE PUBLICA 1998; 14 Suppl 3:161-72. [PMID: 9819474 DOI: 10.1590/s0102-311x1998000700016] [Citation(s) in RCA: 10] [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: 11/21/2022] Open
Abstract
A case study was carried out to explore the occurrence of a cancer cluster in 1992 among young indian adults adults living in an Amazonian village near two 500 kV power transmission lines that began operating a decade ago. Current blood levels of DDT and organophosphorus pesticides and metal levels in hair samples were measured. Extremely low magnetic field exposure was determined during current daily activities carried out by the Indian villagers. Taking into account the cancer incidence rates in different Brazilian cities, the probability of the occurrence of this cluster by chance was considered remote (p< 0.003, Poisson distribution). High blood levels of p,p'-DDT (median levels ranging from 26 to 58 ppb) were observed. As a whole, this community showed a pattern of low exposure to organophosphorus pesticides, and high recent exposure was only observed in a few blood samples. Continuous exposure to extremely low electromagnetic fields originated in the power transmission lines (which reached 95.0 mG under the lines) was observed on several opportunities during daily activities carried out by Indian villagers. Further observational studies should evaluate the interaction between exposure to extremely low electromagnetic fields and prior exposure to tumor initiators in cancer development.
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Affiliation(s)
- S Koifman
- Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz. Av. Leopoldo Bulhões, 1480, Rio de Janeiro, RJ 21041-210, Brasil.
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17
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Baixinho CL, Silva JJ, Abrantes MA, Terrinha R. [Caring for the polytraumatized adolescent]. Servir 1998; 46:64-73. [PMID: 9661518] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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18
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Palma J, Reyes H, Ribalta J, Hernández I, Sandoval L, Almuna R, Liepins J, Lira F, Sedano M, Silva O, Tohá D, Silva JJ. Ursodeoxycholic acid in the treatment of cholestasis of pregnancy: a randomized, double-blind study controlled with placebo. J Hepatol 1997; 27:1022-8. [PMID: 9453428 DOI: 10.1016/s0168-8278(97)80146-8] [Citation(s) in RCA: 257] [Impact Index Per Article: 9.5] [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
BACKGROUND/AIMS Intense pruritus and the risk of stillbirths and premature deliveries justify the search for an effective pharmacologic treatment of intrahepatic cholestasis of pregnancy. This study was designed to test the efficacy of ursodeoxycholic acid in maternal pruritus, the biochemical abnormalities and the outcome of pregnancy, in patients with intrahepatic cholestasis of pregnancy of early onset. METHODS Pregnant patients hospitalized in a secondary case-referral center with intense pruritus and abnormal serum levels of bile salts and aminotransferases, detected before week 33 of pregnancy, were randomly assigned to receive ursodeoxycholic acid, 1 g per day orally, or an identical placebo, until delivery, in a double-blind study. A 3-week trial period was chosen to compare drug and placebo effects. The follow-up was extended for 3 months after delivery. RESULTS Twenty-four patients entered the trial; eight had deliveries before 2 weeks of treatment and one dropped out. The study was then completed in 15 patients: eight received ursodeoxycholic acid and seven placebo. No adverse effects were detected in the mothers or in their babies. After 3 weeks of treatment, patients receiving ursodeoxycholic acid (mean daily dose 16 mg/kg body weight) had a significant improvement in pruritus (p<0.02), in serum bilirubin (0.36+/-0.19 mg/dl (mean+/-SD) versus 0.95+/-0.48 in patients receiving placebo, p<0.01), in aspartate aminotransferase (52+/-42 IU/l vs 98+/-44, p<0.05) and in alanine aminotransferase (54+/-50 IU/l vs 229+/-154, p<0.01); serum total bile salts also tended to be lower in patients receiving ursodeoxycholic acid (26.3+/-33.7 micromol/l vs 55.0+/-44.8, p N.S.). Deliveries occurred at or near term in all mothers who received ursodeoxycholic acid (mean week of pregnancy: 38), while they occurred before week 36 of pregnancy in five patients who received placebo, including one stillbirth. All babies born alive had birth weights adequate for gestational age and they were thriving normally 3 months after delivery. CONCLUSIONS Ursodeoxycholic acid is effective and safe in patients with intrahepatic cholestasis of pregnancy of early onset, attenuating pruritus and correcting some biochemical abnormalities in the mothers. Relevant aspects of fetal outcome were also improved in patients receiving ursodeoxycholic acid compared to placebo.
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Affiliation(s)
- J Palma
- Department of Medicine, University of Chile School of Medicine, Hospital del Salvador, Santiago
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19
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Muñoz M, Valderrabanos ES, Diaz E, Silva JJ, Soult JA, Infante P, Lopez JD, Garcia-Curiel A. Appearance of resistance to beta-lactam antibiotics during therapy for Streptococcus pneumoniae meningitis. J Pediatr 1995; 127:98-9. [PMID: 7608819 DOI: 10.1016/s0022-3476(95)70264-4] [Citation(s) in RCA: 12] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A young boy had meningitis caused by Streptococcus pneumoniae that was relatively resistant to penicillin and susceptible to cefotaxime. After 10 days of therapy with penicillin and cefotaxime, fever recurred and a second lumbar puncture revealed a pneumococcus that was resistant to all beta-lactam antibiotics. We now add vancomycin to empiric third-generation cephalosporin therapy for meningitis in children when gram-positive cocci are seen on the cerebrospinal fluid smear.
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Affiliation(s)
- M Muñoz
- Department of Pediatrics, Virgen Rocio Children's Hospital, Seville University School of Medicine, Spain
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20
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Fernández MP, Silva JJ, Toledo M, Orrego E, Rodríguez C. [ABO materno-fetal incompatibility in the newborn infant: clinical usefulness of Coombs test and elution for the study of hemolytic disease]. Rev Med Chil 1991; 119:1414-8. [PMID: 9723099] [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: 02/08/2023]
Abstract
A decision to establish early treatment for hemolytic disease in the newborn is usually based upon results of the Coombs test. In order to evaluate a possible advantage of using the Elution test to help in the diagnosis of the hemolytic state, samples of cord blood from 197 consecutive newborns with ABO incompatibility were studied. Hemolysis occurred in 41. Each test (Coombs and Elution) was positive in 26 patients, for a total of 35 positive results and a combined sensitivity of 85%. False positives occurred in 24 of 156 patients with Coombs test and in 30 for the Elution test. Thus, combined results of both test would have suggested a need for phototherapy in 72 of 197 patients when in fact it was needed for only 41. Conversely, 13 patients with hemolytic disease were missed by both tests. The negative predictive value of both tests combined was 95% which is useful for clinical practice.
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Affiliation(s)
- M P Fernández
- Departamento de Obstetricia y Ginecología, Banco de Sangre Hospital Clínico de la Universidad de Chile, Santiago de Chile
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21
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Astorga G, Cubillos A, Masson L, Silva JJ. [Active rheumatoid arthritis: effect of dietary supplementation with omega-3 oils. A controlled double-blind trial]. Rev Med Chil 1991; 119:267-72. [PMID: 1842119] [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: 12/29/2022]
Abstract
We evaluated the effect of dietary supplementation with eicosapentaenoic acid in 8 patients with active rheumatoid arthritis. An appropriate placebo was given in a randomized double blind fashion to 8 control subjects. After 12 weeks of therapy a significant improvement in prehensile function was detected in patients receiving active treatment, other clinical parameters remaining unchanged. No significant side effects were detected. A larger trial may help define a possible therapeutic role for omega-3 fatty acids in patients with rheumatoid arthritis.
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Affiliation(s)
- G Astorga
- Departamento de Medicina (Sección Reumatología), Facultad de Medicina, Universidad de Chile, Santiago
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22
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Silva JJ, Csendes A, Passalacqua H, Ruiz F. [Clinico-surgical correlation of axial computed tomography in the extension of gastric and esophageal cancer]. Rev Med Chil 1986; 114:748-51. [PMID: 3575958] [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: 01/06/2023]
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Barone AD, Silva JJ, Ho DD, Gallo RC, Wong-Staal FF, Chang NT. Reactivity of E. coli-derived trans-activating protein of human T lymphotropic virus type III with sera from patients with acquired immune deficiency syndrome. The Journal of Immunology 1986. [DOI: 10.4049/jimmunol.137.2.669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Randomly sheared DNA fragments from HTLV-III proviral DNA were cloned into an E. coli open reading frame (ORF) expression vector. The inserted ORF DNA was expressed in E. coli transformants as a polypeptide fused to the lambda CI protein at the amino terminus and to beta-galactosidase at the carboxyl terminus. The reactivity of the recombinant peptides with antibodies from sera of AIDS patients was determined by the Western blot technique. The coordinates of the DNA inserts of the immunoreactive clones were then determined by DNA sequencing. A clone, ORF 628, was found to contain a short DNA segment located between the sor and env genes (nucleotide positions 5367 to 5597), a region previously thought to be noncoding. Inspection of the DNA sequences of this clone and of other HTLV-III isolates revealed the presence of a small ORF located between nucleotide position 5411 and 5625, capable of encoding a polypeptide of 72 amino acids. The biosynthesis of the polypeptide of ORF 628 initiates from an ATG codon within the HTLV-III insert. The fusion protein of ORF 628 was partially purified by affinity chromatography on CH Sepharose 4B coupled to a beta-galactosidase ligand, and tested against a panel of sera from AIDS patients by Western blot analysis. Approximately 35% of the sera from patients with AIDS or ARC contained antibodies reactive with the peptide. The DNA region spanned by ORF 628 is now thought to be the major functional element of the trans-activator gene, tat.
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Barone AD, Silva JJ, Ho DD, Gallo RC, Wong-Staal FF, Chang NT. Reactivity of E. coli-derived trans-activating protein of human T lymphotropic virus type III with sera from patients with acquired immune deficiency syndrome. J Immunol 1986; 137:669-73. [PMID: 3013999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Randomly sheared DNA fragments from HTLV-III proviral DNA were cloned into an E. coli open reading frame (ORF) expression vector. The inserted ORF DNA was expressed in E. coli transformants as a polypeptide fused to the lambda CI protein at the amino terminus and to beta-galactosidase at the carboxyl terminus. The reactivity of the recombinant peptides with antibodies from sera of AIDS patients was determined by the Western blot technique. The coordinates of the DNA inserts of the immunoreactive clones were then determined by DNA sequencing. A clone, ORF 628, was found to contain a short DNA segment located between the sor and env genes (nucleotide positions 5367 to 5597), a region previously thought to be noncoding. Inspection of the DNA sequences of this clone and of other HTLV-III isolates revealed the presence of a small ORF located between nucleotide position 5411 and 5625, capable of encoding a polypeptide of 72 amino acids. The biosynthesis of the polypeptide of ORF 628 initiates from an ATG codon within the HTLV-III insert. The fusion protein of ORF 628 was partially purified by affinity chromatography on CH Sepharose 4B coupled to a beta-galactosidase ligand, and tested against a panel of sera from AIDS patients by Western blot analysis. Approximately 35% of the sera from patients with AIDS or ARC contained antibodies reactive with the peptide. The DNA region spanned by ORF 628 is now thought to be the major functional element of the trans-activator gene, tat.
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Silva JJ, Schmidt A, Rappoport J. [Effect of povidone-iodine vs. iodine on the prevention of surgical wound infection]. Rev Med Chil 1985; 113:103-5. [PMID: 3909283] [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: 01/08/2023]
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26
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Silva JJ, Smock G, Csendes A, Braghetto I, Larrachea P. [Cancer of the gastric stump]. Rev Med Chil 1984; 112:1116-8. [PMID: 6537005] [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: 01/20/2023]
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Silva JJ, Paiva LM, Silva JB, Netto BA. [Study of pulmonary involvement in Weil's disease]. Rev Inst Med Trop Sao Paulo 1976; 18:387-92. [PMID: 1006068] [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: 12/25/2022] Open
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