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Sharon E. Jacob - One of the best experts on this subject based on the ideXlab platform.
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Allergic Contact Dermatitis in Children: Review of the Past Decade
Current Allergy and Asthma Reports, 2014Co-Authors: Shehla Admani, Sharon E. JacobAbstract:Allergic contact dermatitis (ACD) is a type IV delayed hypersensitivity reaction. During the last decade, there has been a heightened awareness of this disease in the pediatric population. The gold standard for diagnosis is patch testing. The prevalence of positive patch tests in referred children with suspected ACD ranges from 27 to 95.6 %. The most common allergens in children in North America are nickel, neomycin, cobalt, fragrance, Myroxylon pereirae , gold, formaldehyde, lanolin/wool alcohols, thimerosal, and potassium dichromate. The relationship between ACD and atopic dermatitis (AD) is complicated with conflicting reports of prevalence in the literature; however, in a patient with dermatitis not responding to traditional therapies, or with new areas of involvement, ACD should be considered as part of the work-up.
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Systemic contact dermatitis--kids and ketchup.
Pediatric Dermatology, 2012Co-Authors: Elise M. Herro, Sharon E. JacobAbstract:: Systemic manifestations of allergic contact dermatitis due to consumption of foods containing balsam of Peru (Myroxylon pereirae)-associated chemicals have recently been reported in children. We present seven children with widespread, recalcitrant dermatitis who experienced 60–80% clearance after initiating a diet low in balsam of Peru, specifically the tomato product ketchup. Furthermore, because we have observed a high prevalence of ketchup in our pediatric patients’ diets, we recommend consideration of moderate consumption of this product in patients with recalcitrant widespread dermatitis.
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Systemic Contact Dermatitis – Kids and Ketchup
Pediatric dermatology, 2012Co-Authors: Elise M. Herro, Sharon E. JacobAbstract:Systemic manifestations of allergic contact dermatitis due to consumption of foods containing balsam of Peru (Myroxylon pereirae)-associated chemicals have recently been reported in children. We present seven children with widespread, recalcitrant dermatitis who experienced 60-80% clearance after initiating a diet low in balsam of Peru, specifically the tomato product ketchup. Furthermore, because we have observed a high prevalence of ketchup in our pediatric patients' diets, we recommend consideration of moderate consumption of this product in patients with recalcitrant widespread dermatitis.
Ana Maria Goulart De Azevedo Tozzi - One of the best experts on this subject based on the ideXlab platform.
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Tree species of Papilionoideae (Leguminosae) in northwest of São Paulo state, Brazil
Rodriguésia, 2016Co-Authors: Milena Ventrichi Martins, Ana Maria Goulart De Azevedo Tozzi, Osmar Cavassan, Ingrid KochAbstract:In this study, we collected woody plants of Papilionoideae, Leguminosae, in the northwest region of Sao Paulo state, southeastern Brazil. The study area has one of the most fragmented vegetation within the context of the region, and it is still poorly known about the flora. Nineteen species were recorded in eleven genera and three tribes. The most representative tribes were Sophoreae, with the genus Bowdichia, Leptolobium, Myroxylon, Sweetia and Ormosia; tribe Dalbergieae, with Andira, Centrolobium, Machaerium and Platypodium, and tribe Dipterygeae represented by Dipteryx and Pterodon. Machaerium presented the highest number of species, with eight, followed by Leptolobium, with two species. The other genera were represented by one species each. The species distribution data showed that the regional flora consists of species with wide distribution in the Cerrado, in central Brazil, and species that occur primarily in the Atlantic forest in eastern Brazil. Keys, descriptions and illustrations of the taxa found are displayed.
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A revision of the genus Myroxylon (Leguminosae: Papilionoideae)
Kew Bulletin, 2015Co-Authors: Ângela Lúcia Bagnatori Sartori, Gwilym P. Lewis, Vidal Freitas Mansano, Ana Maria Goulart De Azevedo TozziAbstract:Myroxylon, an exclusively neotropical legume genus, is taxonomically revised to include two species. Seven lectotypes, one neotype and three synonyms are designated. M. peruiferum and M. balsamum can be differentiated by pellucid dots and streaks in leaflets, adaxial surface dull or shiny, shapes of calyx lobes and standard, size of flowers and the standard petal blade and seed surface. A key to the two species is presented, together with species descriptions, illustrations and comments on the geographical distribution and ecology of each.
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Comparative leaflet anatomy in Myrocarpus Allemão, Myroxylon L. f and Myrospermum Jacq. (Leguminosae–Papilionoideae–Sophoreae) species
Botanical Journal of the Linnean Society, 2002Co-Authors: Ângela L. B. Sartori, Ana Maria Goulart De Azevedo TozziAbstract:A comparative study on anatomical characters of the leaflets of all species of Myrocarpus, Myroxylon and Myrospermum was carried out in order to evaluate their potential value in taxonomy. The study showed that among the investigated characters the arrangement of the main vascular bundles as seen in transverse section, the presence or absence of secretary structures in the midrib, the occurrence and position of papillose epidermal cells, and mesophyll organization present meaningful variation between the species and in combination or uniquely their occurrence can be used to identify the species. Some of the obtained anatomical data support generic or specific circumscriptions and are listed for the first time for most of the species of Myrocarpus, Myroxylon and Myrospermum. © The Linnean Society of London, Botanical Journal of the Linnean Society, 2002, 140, 249–259.
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comparative leaflet anatomy in myrocarpus allemao Myroxylon l f and myrospermum jacq leguminosae papilionoideae sophoreae species
Botanical Journal of the Linnean Society, 2002Co-Authors: Ângela L. B. Sartori, Ana Maria Goulart De Azevedo TozziAbstract:A comparative study on anatomical characters of the leaflets of all species of Myrocarpus, Myroxylon and Myrospermum was carried out in order to evaluate their potential value in taxonomy. The study showed that among the investigated characters the arrangement of the main vascular bundles as seen in transverse section, the presence or absence of secretary structures in the midrib, the occurrence and position of papillose epidermal cells, and mesophyll organization present meaningful variation between the species and in combination or uniquely their occurrence can be used to identify the species. Some of the obtained anatomical data support generic or specific circumscriptions and are listed for the first time for most of the species of Myrocarpus, Myroxylon and Myrospermum. © The Linnean Society of London, Botanical Journal of the Linnean Society, 2002, 140, 249–259.
Maria Imaculada Zucchi - One of the best experts on this subject based on the ideXlab platform.
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viabilidade genetica de restauracoes florestais diversidade e estrutura genetica em Myroxylon peruiferum l f
2014Co-Authors: Kaiser Dias Schwarcz, Maria Imaculada ZucchiAbstract:A degradacao ecologica e o desflorestamento sao processos que se iniciaram ha muito tempo e cuja historia confunde-se com a da agricultura. A Mata Atlântica e a segunda maior floresta tropical em ocorrencia e importância na America do Sul, possuindo grande diversidade biologica e altos niveis de endemismo. A ocupacao desordenada da Mata Atlântica causou sua reducao a 11,26% de sua area original, com distribuicao de forma fragmentada pelo territorio brasileiro. A destruicao da Mata Atlântica tem resultado na eliminacao de muitas populacoes e, potencialmente, na erosao da diversidade genetica de diversas especies. Essa combinacao de alto endemismo e forte ameaca de extincao, faz com que a Mata Atlântica seja considerada um hotspot para a conservacao. Nas ultimas decadas a recuperacao de ecossistemas degradados recebeu a atencao da comunidade cientifica, dando origem ao campo do conhecimento chamado Ecologia da Restauracao, que se dedica aos estudos teoricos dos principios, praticas, resultados e consequencias de projetos de restauracao. O estudo e monitoramento de areas de restauracao florestal e essencial para melhorar as tecnicas de restauracao em ecossistemas tropicais e subtropicais. Para que uma determinada especie se perpetue em uma area em processo de restauracao, e preciso que a mesma desenvolva todo o seu ciclo de vida e que gerem descendentes capazes de se desenvolver a ponto de substituir as arvores maes quando as mesmas entrarem em senescencia. Por isso ha a necessidade de se estudar a variabilidade genetica de populacoes arboreas dentro de areas de floresta restaurada, assim como a ocorrencia e efetividade do fluxo genico entre estas areas e os fragmentos de seu entorno. Neste trabalho, estudamos a variabilidade genetica de Myroxylon peruiferum L. f., em duas diferentes areas de restauracao florestal e em duas areas de remanescentes naturais de Floresta Estacional Semidecidual. Nossos resultados indicam que as restauracoes florestais de Cosmopolis e Iracemapolis conservam diversidades geneticas HE e alelicas semelhantes as de remanescentes naturais. A principal diferenca entre areas naturais e restauradas foi a menor riqueza de alelos endemicos nestas ultimas o que e um efeito de amostragem que favorece a perda de alelos raros. A area de restauracao florestal mais antiga em Cosmopolis apresentou uma estruturacao genetica espacial compativel com a de areas naturais. O mesmo nao ocorreu com a restauracao mais recente de Iracemapolis. Observou-se a ocorrencia de estruturacao genetica local nas areas naturais e na area de restauracao mais antiga e indicios de fluxo genico entre os areas nativas e restauradas. Um estudo adicional do efeito de amostragem sobre as frequencias alelicas demonstrou o fenomeno de perda de alelos com baixa frequencia em eventos de amostragem. O mesmo trabalho indicou que uma amostra de cerca de 30 individuos e capaz de representar adequadamente alelos com frequencias acima de 0,05; sendo este um bom numero a se considerar na selecao de matrizes para fornecimento de mudas para restauracao florestal. Abstract
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Microsatellite markers for the Cabreúva tree, Myroxylon peruiferum (Fabaceae), an endangered medicinal species from the Brazilian Atlantic Forest
Genetics and molecular research : GMR, 2014Co-Authors: Kaiser Dias Schwarcz, Miklos Maximiliano Bajay, Camila Menezes Trindade Macrini, V. L. P Salazar, Anete Pereira De Souza, José Baldin Pinheiro, Pedro H. S. Brancalion, Ricardo Ribeiro Rodrigues, Maria Imaculada ZucchiAbstract:The Cabreuva tree, Myroxylon peruiferum, is an endangered tropical species from Brazil used in forest restoration projects. It is known for its medicinal properties. Eleven microsatellite markers were developed for this species, from a microsatellite-enriched library. Nine of these markers, characterized in 30 individuals from a semideciduous forest remnant population in southeast Brazil, were polymorphic, with allele numbers ranging from 2 to 8 per locus; expected and observed heterozygosities ranged from 0.103 to 0.757 and 0.107 to 0.704, respectively. One locus (Mpe-C04) showed significant deviation from Hardy-Weinberg equilibrium, probably due to null alleles. Two other loci (Mpe-E09 and Mpe-H07) were monomorphic in this population. These microsatellite loci should be useful for future population genetic studies of this species.
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Microsatellite markers for the Cabreúva tree, Myroxylon peruiferum (Fabaceae), an endangered medicinal species from the
2014Co-Authors: Brazilian Atlantic Forest, Kaiser Dias Schwarcz, Maria Imaculada ZucchiAbstract:The Cabreuva tree, Myroxylon peruiferum, is an endangered tropical species from Brazil used in forest restoration projects. It is known for its medicinal properties. Eleven microsatellite markers were developed for this species, from a microsatellite-enriched library. Nine of these markers, characterized in 30 individuals from a semideciduous forest remnant population in southeast Brazil, were
F Camacho - One of the best experts on this subject based on the ideXlab platform.
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sensitivity to Myroxylon pereirae resin balsam of peru a study of 50 cases
Contact Dermatitis, 2005Co-Authors: P Avalosperalta, B Garciabravo, F CamachoAbstract:: The Myroxylon pereirae resin (MP; balsam of Peru) is a natural resin used in the local treatment of burns and wounds. M. pereirae extracts and distillates are very often contained in a wide range of cosmetic products and causes frequently allergic contact dermatitis - to the extent of being considered an allergy marker to perfumes. We have carried out a retrospective study of 863 patients who have been submitted to patch tests from January 2002 to June 2004. A total of 50 patients were positive to MP. Thus, the prevalence was 5.79%, slightly higher in men (7.32%) than in women (4.91%). The positive patch tests were relevant in 64%. Over the last years, it appears that there is a clear increase of the prevalence of the sensitization to MP in all the studies published. We observe an increase of the prevalence especially in aged patients, where the sensitization is linked with the use of topical medications secondary to stasis dermatitis. The high frequency of allergy to MP in our area might be associated with manipulation of citrus fruits. The increasing use of cosmetic products by the male population can also be held responsible for the higher sensitization rate in this group of patients.
Kaiser Dias Schwarcz - One of the best experts on this subject based on the ideXlab platform.
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Genetic feasibility of forest restorations : genetic diversity and structure in Myroxylon peruiferum L.f
2017Co-Authors: Kaiser Dias SchwarczAbstract:Resumo: A degradação ecológica e o desflorestamento são processos que se iniciaram há muito tempo e cuja história confunde-se com a da agricultura. A Mata Atlântica é a segunda maior floresta tropical em ocorrência e importância na América do Sul, possuindo grande diversidade biológica e altos níveis de endemismo. A ocupação desordenada da Mata Atlântica causou sua redução a 11,26% de sua área original, com distribuição de forma fragmentada pelo território brasileiro. A destruição da Mata Atlântica tem resultado na eliminação de muitas populações e, potencialmente, na erosão da diversidade genética de diversas espécies. Essa combinação de alto endemismo e forte ameaça de extinção, faz com que a Mata Atlântica seja considerada um hotspot para a conservação. Nas últimas décadas a recuperação de ecossistemas degradados recebeu a atenção da comunidade científica, dando origem ao campo do conhecimento chamado Ecologia da Restauração, que se dedica aos estudos teóricos dos princípios, práticas, resultados e conseqüências de projetos de restauração. O estudo e monitoramento de áreas de restauração florestal é essencial para melhorar as técnicas de restauração em ecossistemas tropicais e subtropicais. Para que uma determinada espécie se perpetue em uma área em processo de restauração, é preciso que a mesma desenvolva todo o seu ciclo de vida e que gerem descendentes capazes de se desenvolver a ponto de substituir as árvores mães quando as mesmas entrarem em senescência. Por isso há a necessidade de se estudar a variabilidade genética de populações arbóreas dentro de áreas de floresta restaurada, assim como a ocorrência e efetividade do fluxo gênico entre estas áreas e os fragmentos de seu entorno. Neste trabalho, estudamos a variabilidade genética de Myroxylon peruiferum L. f., em duas diferentes áreas de restauração florestal e em duas áreas de remanescentes naturais de Floresta Estacional Semidecidual. Nossos resultados indicam que as restaurações florestais de Cosmópolis e Iracemápolis conservam diversidades genéticas HE e alélicas semelhantes às de remanescentes naturais. A principal diferença entre áreas naturais e restauradas foi a menor riqueza de alelos endêmicos nestas últimas o que é um efeito de amostragem que favorece a perda de alelos raros. A área de restauração florestal mais antiga em Cosmópolis apresentou uma estruturação genética espacial compatível com a de áreas naturais. O mesmo não ocorreu com a restauração mais recente de Iracemápolis. Observou-se a ocorrência de estruturação genética local nas áreas naturais e na área de restauração mais antiga e indícios de fluxo gênico entre os áreas nativas e restauradas. Um estudo adicional do efeito de amostragem sobre as freqüências alélicas demonstrou o fenômeno de perda de alelos com baixa freqüência em eventos de amostragem. O mesmo trabalho indicou que uma amostra de cerca de 30 indivíduos é capaz de representar adequadamente alelos com freqüências acima de 0,05; sendo este um bom número a se considerar na seleção de matrizes para fornecimento de mudas para restauração florestal. ;;Abstract: Ecological degradation and deforestation are processes that started long ago and whose history is intertwined with that of agriculture. Atlantic Forest is the second largest rainforest in occurrence and importance in South America, having great biological diversity and high levels of endemism. Disordered occupation of Atlantic Forest caused its reduction to 11.26% of the original area, with distribution in forest fragments poorly conected across the Brazilian territory. Destruction of the Atlantic Forest has resulted in the elimination of many populations and potentially the erosion of genetic diversity of several species. This combination of high endemism and strong threat of extinction causes the Atlantic Forest to be considered a hotspot for conservation. In the last decades recovery of degraded ecosystems has received attention from the scientific community giving birth to an new area of knowledge called the Restoration Ecology. The study and monitoring of areas of forest restoration is essential to improve restoration techniques in tropical and subtropical ecosystems. For a given species to perpetuate itself in an area undergoing a restoration process, it needs to develop its whole life cycle and generates progeny capable of developing to the point of replacing mothers trees when they die. Therefore there is a need to study the genetic variability of tree populations within areas of restored forest, as well as the occurrence and effectiveness of gene flow between these areas and surrounding fragments. We studied the genetic variability of Myroxylon peruiferum L. f., in two different areas of forest restoration and in two areas of natural remnants of semideciduous forest. Our results indicates that restorations in Cosmopolis and Iracemápolis conserve genetic and allelic diversity HE similar to that of natural remnants. The main difference between natural and restored areas was the lowest richness of endemic alleles which is the result of a sampling effect that favors the loss of rare alleles. The area of older forest restoration in Cosmopolis presented a spatial genetic structure consistent with natural areas. This did not occur with the newer restoration in Iracemápolis. We observed the occurrence of local genetic structure in natural areas and in the area of older restoration and evidence of gene flow between native and restored areas. An additional study about the effect of sampling size on allele frequencies showed the phenomenon of loss of low frequency alleles in sampling events. The same study found that a sample of about 30 individuals are able to adequately represent alleles with frequencies above 0.05; this is a good number to consider in selecting matrix trees to supply seedlings for forest restoration
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viabilidade genetica de restauracoes florestais diversidade e estrutura genetica em Myroxylon peruiferum l f
2014Co-Authors: Kaiser Dias Schwarcz, Maria Imaculada ZucchiAbstract:A degradacao ecologica e o desflorestamento sao processos que se iniciaram ha muito tempo e cuja historia confunde-se com a da agricultura. A Mata Atlântica e a segunda maior floresta tropical em ocorrencia e importância na America do Sul, possuindo grande diversidade biologica e altos niveis de endemismo. A ocupacao desordenada da Mata Atlântica causou sua reducao a 11,26% de sua area original, com distribuicao de forma fragmentada pelo territorio brasileiro. A destruicao da Mata Atlântica tem resultado na eliminacao de muitas populacoes e, potencialmente, na erosao da diversidade genetica de diversas especies. Essa combinacao de alto endemismo e forte ameaca de extincao, faz com que a Mata Atlântica seja considerada um hotspot para a conservacao. Nas ultimas decadas a recuperacao de ecossistemas degradados recebeu a atencao da comunidade cientifica, dando origem ao campo do conhecimento chamado Ecologia da Restauracao, que se dedica aos estudos teoricos dos principios, praticas, resultados e consequencias de projetos de restauracao. O estudo e monitoramento de areas de restauracao florestal e essencial para melhorar as tecnicas de restauracao em ecossistemas tropicais e subtropicais. Para que uma determinada especie se perpetue em uma area em processo de restauracao, e preciso que a mesma desenvolva todo o seu ciclo de vida e que gerem descendentes capazes de se desenvolver a ponto de substituir as arvores maes quando as mesmas entrarem em senescencia. Por isso ha a necessidade de se estudar a variabilidade genetica de populacoes arboreas dentro de areas de floresta restaurada, assim como a ocorrencia e efetividade do fluxo genico entre estas areas e os fragmentos de seu entorno. Neste trabalho, estudamos a variabilidade genetica de Myroxylon peruiferum L. f., em duas diferentes areas de restauracao florestal e em duas areas de remanescentes naturais de Floresta Estacional Semidecidual. Nossos resultados indicam que as restauracoes florestais de Cosmopolis e Iracemapolis conservam diversidades geneticas HE e alelicas semelhantes as de remanescentes naturais. A principal diferenca entre areas naturais e restauradas foi a menor riqueza de alelos endemicos nestas ultimas o que e um efeito de amostragem que favorece a perda de alelos raros. A area de restauracao florestal mais antiga em Cosmopolis apresentou uma estruturacao genetica espacial compativel com a de areas naturais. O mesmo nao ocorreu com a restauracao mais recente de Iracemapolis. Observou-se a ocorrencia de estruturacao genetica local nas areas naturais e na area de restauracao mais antiga e indicios de fluxo genico entre os areas nativas e restauradas. Um estudo adicional do efeito de amostragem sobre as frequencias alelicas demonstrou o fenomeno de perda de alelos com baixa frequencia em eventos de amostragem. O mesmo trabalho indicou que uma amostra de cerca de 30 individuos e capaz de representar adequadamente alelos com frequencias acima de 0,05; sendo este um bom numero a se considerar na selecao de matrizes para fornecimento de mudas para restauracao florestal. Abstract
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Microsatellite markers for the Cabreúva tree, Myroxylon peruiferum (Fabaceae), an endangered medicinal species from the Brazilian Atlantic Forest
Genetics and molecular research : GMR, 2014Co-Authors: Kaiser Dias Schwarcz, Miklos Maximiliano Bajay, Camila Menezes Trindade Macrini, V. L. P Salazar, Anete Pereira De Souza, José Baldin Pinheiro, Pedro H. S. Brancalion, Ricardo Ribeiro Rodrigues, Maria Imaculada ZucchiAbstract:The Cabreuva tree, Myroxylon peruiferum, is an endangered tropical species from Brazil used in forest restoration projects. It is known for its medicinal properties. Eleven microsatellite markers were developed for this species, from a microsatellite-enriched library. Nine of these markers, characterized in 30 individuals from a semideciduous forest remnant population in southeast Brazil, were polymorphic, with allele numbers ranging from 2 to 8 per locus; expected and observed heterozygosities ranged from 0.103 to 0.757 and 0.107 to 0.704, respectively. One locus (Mpe-C04) showed significant deviation from Hardy-Weinberg equilibrium, probably due to null alleles. Two other loci (Mpe-E09 and Mpe-H07) were monomorphic in this population. These microsatellite loci should be useful for future population genetic studies of this species.
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Microsatellite markers for the Cabreúva tree, Myroxylon peruiferum (Fabaceae), an endangered medicinal species from the
2014Co-Authors: Brazilian Atlantic Forest, Kaiser Dias Schwarcz, Maria Imaculada ZucchiAbstract:The Cabreuva tree, Myroxylon peruiferum, is an endangered tropical species from Brazil used in forest restoration projects. It is known for its medicinal properties. Eleven microsatellite markers were developed for this species, from a microsatellite-enriched library. Nine of these markers, characterized in 30 individuals from a semideciduous forest remnant population in southeast Brazil, were
