Open challenge for the diagnosis of cow's milk protein allergy

OBJECTIVES: To report the results of open challenge tests performed in children fed with cow's milk-free diet. DESCRIPTIONS: Cross-sectional study evaluating cow's milk open challenge performed under supervision in a hospital setting during 2.5 hours and ambulatory follow-up for 30 days when no immediate reaction occurred. One hundred and twenty-one patients were included, with ages between 4 and 95 months. Cow's milk open challenge tests were positive in 28 patients (23.1%). A clinical manifestation of cow's milk allergy different from the one presented at diagnosis occurred in 12 (24.9%) patients with positive challenge. Positive challenge was more frequent (p = 0.042) in patients fed with extensively hydrolyzed formulae or amino acid-based formulae (30.3%) when compared to those fed with other exclusion diets (14.5%). CONCLUSION: Open challenge allowed the interruption of exclusion diet in a significant proportion of the patients.OBJETIVO: Relatar os resultados de testes de desencadeamento aplicados em crianças alimentadas com dieta de exclusão das proteínas do leite de vaca. DESCRIÇÃO: Estudo transversal que avaliou testes de desencadeamento oral aberto, com leite de vaca, realizados sob supervisão em ambiente hospitalar por 2,5 horas e ambulatoriamente por 30 dias quando não ocorreu reação imediata. Foram incluídos 121 pacientes, com idades entre 4 e 95 meses. O teste de desencadeamento com leite de vaca foi positivo em 28 (23,1%) pacientes. Manifestação clínica de alergia ao leite de vaca diferente da apresentada por ocasião da suspeita diagnóstica ocorreu em 12 (42,9%) pacientes com desencadeamento positivo. O desencadeamento positivo foi mais frequente (p = 0,042) nos pacientes alimentados com fórmulas extensamente hidrolisadas ou de aminoácidos (30,3%) quando comparados com os alimentados com outras dietas de exclusão (14,5%). CONCLUSÃO: O teste de desencadeamento permitiu que fosse suspensa a dieta de exclusão de grande parte dos pacientes.Universidade Federal de São Paulo (UNIFESP) Disciplina de Gastroenterologia PediátricaHospital Pequeno Príncipe Centro de Gastroenterologia PediátricaUNIFESP Curso de NutriçãoUNIFESP Disciplina de Gastroenterologia PediátricaUNIFESP, Disciplina de Gastroenterologia PediátricaUNIFESP, Curso de NutriçãoUNIFESP, Disciplina de Gastroenterologia PediátricaSciEL

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost

Retrospective evaluation of whole exome and genome mutation calls in 746 cancer samples

Funder: NCI U24CA211006Abstract: The Cancer Genome Atlas (TCGA) and International Cancer Genome Consortium (ICGC) curated consensus somatic mutation calls using whole exome sequencing (WES) and whole genome sequencing (WGS), respectively. Here, as part of the ICGC/TCGA Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium, which aggregated whole genome sequencing data from 2,658 cancers across 38 tumour types, we compare WES and WGS side-by-side from 746 TCGA samples, finding that ~80% of mutations overlap in covered exonic regions. We estimate that low variant allele fraction (VAF < 15%) and clonal heterogeneity contribute up to 68% of private WGS mutations and 71% of private WES mutations. We observe that ~30% of private WGS mutations trace to mutations identified by a single variant caller in WES consensus efforts. WGS captures both ~50% more variation in exonic regions and un-observed mutations in loci with variable GC-content. Together, our analysis highlights technological divergences between two reproducible somatic variant detection efforts

Teste de desencadeamento aberto no diagnóstico de alergia à proteína do leite de vaca Open challenge for the diagnosis of cow's milk protein allergy

OBJETIVO: Relatar os resultados de testes de desencadeamento aplicados em crianças alimentadas com dieta de exclusão das proteínas do leite de vaca. DESCRIÇÃO: Estudo transversal que avaliou testes de desencadeamento oral aberto, com leite de vaca, realizados sob supervisão em ambiente hospitalar por 2,5 horas e ambulatoriamente por 30 dias quando não ocorreu reação imediata. Foram incluídos 121 pacientes, com idades entre 4 e 95 meses. O teste de desencadeamento com leite de vaca foi positivo em 28 (23,1%) pacientes. Manifestação clínica de alergia ao leite de vaca diferente da apresentada por ocasião da suspeita diagnóstica ocorreu em 12 (42,9%) pacientes com desencadeamento positivo. O desencadeamento positivo foi mais frequente (p = 0,042) nos pacientes alimentados com fórmulas extensamente hidrolisadas ou de aminoácidos (30,3%) quando comparados com os alimentados com outras dietas de exclusão (14,5%). CONCLUSÃO: O teste de desencadeamento permitiu que fosse suspensa a dieta de exclusão de grande parte dos pacientes.<br>OBJECTIVES: To report the results of open challenge tests performed in children fed with cow's milk-free diet. DESCRIPTIONS: Cross-sectional study evaluating cow's milk open challenge performed under supervision in a hospital setting during 2.5 hours and ambulatory follow-up for 30 days when no immediate reaction occurred. One hundred and twenty-one patients were included, with ages between 4 and 95 months. Cow's milk open challenge tests were positive in 28 patients (23.1%). A clinical manifestation of cow's milk allergy different from the one presented at diagnosis occurred in 12 (24.9%) patients with positive challenge. Positive challenge was more frequent (p = 0.042) in patients fed with extensively hydrolyzed formulae or amino acid-based formulae (30.3%) when compared to those fed with other exclusion diets (14.5%). CONCLUSION: Open challenge allowed the interruption of exclusion diet in a significant proportion of the patients

Eosinophilic esophagitis in 29 pediatric patients

Racional - A esofagite eosinofílica é uma entidade recentemente descrita, caracterizada por sintomas esofágicos, semelhantes aos da doença por refluxo gastroesofágico e importante eosinofilia esofágica. Objetivo - Apresentação de 29 pacientes com esofagite eosinofílica, discutindo as características clínicas, diagnóstico, tratamento e evolução. Métodos - Foram identificados 29 pacientes (22 do sexo masculino) com idade entre 1 e 18 anos, nos quais as biopsias de esôfago demonstraram contagem de 20 ou mais eosinófilos/campo de grande aumento, sem infiltração eosinofílica em antro e/ou duodeno. Avaliaram-se as manifestações clínicas, achados endoscópicos e histológicos, tratamento e evolução. Resultados - Os sintomas mais freqüentes foram vômitos em 15 pacientes (52%) e dor abdominal em 11 (38%). Os pacientes com idade inferior a 4 anos apresentavam recusa alimentar e baixo peso. Os com idades entre 5 e 8 anos apresentavam predominantemente dor abdominal e/ou pirose e/ou vômitos. Os pacientes com mais de 8 anos apresentavam dor abdominal, disfagia e/ou impactação alimentar eventual. Os achados endoscópicos incluíram estrias verticais em 14 pacientes (48%), pontilhado branco em 12 (41%), anéis circulares em 2 (7%) e esofagite erosiva em 3 (10%). Em sete pacientes a endoscopia foi normal (24%). O tratamento incluiu fluticasona tópica em 19 pacientes e restrição dietética em 7. Os pacientes acompanhados apresentaram resposta favorável ao tratamento, com melhora ou remissão dos sintomas. Onze pacientes que foram submetidos a endoscopia de controle pós-tratamento apresentaram diminuição significativa do número de eosinófilos no esôfago. Conclusões - A esofagite eosinofílica deve ser considerada quando há sintomas de refluxo, que não respondem ao tratamento habitual. Os exames endoscópicos devem ser acompanhados de biopsias com análise detalhada do número de eosinófilos.Background - Eosinophilic esophagitis is a recently described entity with esophageal symptoms like gastroesophageal reflux disease and significant esophageal eosinophilic infiltration. Aim - To present our clinical series of 29 children with eosinophilic esophagitis, describing the clinical and diagnostic features, treatment and outcome. Methods - We describe 29 patients (22 boys), 1-18 years-old, with 20 eosinophils per high-power field in esophageal biopsy specimens and absence of eosinophilic inflammation in the stomach and duodenum. Evaluation of the clinical, endoscopic and histologic findings, treatment and outcome was undertaken. Results - The most common presenting symptoms included vomiting in 15 patients (52%) and abdominal pain in 11 patients (38%). Children under the age of 4 years presented with feeding disorder and failure to thrive. Patients between 5 and 8 years of age presented commonly with abdominal pain or symptoms that may be associated with reflux (heartburn and/or vomiting). Patients over the age of 8 presented most often with abdominal pain, dysphagia and occasional food impaction. Endoscopic features included vertical furrowing in 14 patients (48%), whitish papules in 12 (41%), corrugated rings in 2 patients (7%) and esophageal erosions in 3 patients (10%). In seven patients endoscopy was normal (24%). Treatment included swallowed fluticasone propionate in 19 patients and restriction diet in 7 patients. Patients who returned for follow-up had either improvement or remission of symptoms. After treatment, endoscopic biopsies were repeated in 11 patients, and a significant decrease in esophageal eosinophil counts was observed. Conclusions - The diagnosis of eosinophilic esophagitis must be considered when symptoms of reflux do not respond to conventional treatment. Upper gastrointestinal endoscopy must be complemented by a detailed analysis of histologic findings and eosinophil counts

Eosinophilic esophagitis in 29 pediatric patients

Racional - A esofagite eosinofílica é uma entidade recentemente descrita, caracterizada por sintomas esofágicos, semelhantes aos da doença por refluxo gastroesofágico e importante eosinofilia esofágica. Objetivo - Apresentação de 29 pacientes com esofagite eosinofílica, discutindo as características clínicas, diagnóstico, tratamento e evolução. Métodos - Foram identificados 29 pacientes (22 do sexo masculino) com idade entre 1 e 18 anos, nos quais as biopsias de esôfago demonstraram contagem de 20 ou mais eosinófilos/campo de grande aumento, sem infiltração eosinofílica em antro e/ou duodeno. Avaliaram-se as manifestações clínicas, achados endoscópicos e histológicos, tratamento e evolução. Resultados - Os sintomas mais freqüentes foram vômitos em 15 pacientes (52%) e dor abdominal em 11 (38%). Os pacientes com idade inferior a 4 anos apresentavam recusa alimentar e baixo peso. Os com idades entre 5 e 8 anos apresentavam predominantemente dor abdominal e/ou pirose e/ou vômitos. Os pacientes com mais de 8 anos apresentavam dor abdominal, disfagia e/ou impactação alimentar eventual. Os achados endoscópicos incluíram estrias verticais em 14 pacientes (48%), pontilhado branco em 12 (41%), anéis circulares em 2 (7%) e esofagite erosiva em 3 (10%). Em sete pacientes a endoscopia foi normal (24%). O tratamento incluiu fluticasona tópica em 19 pacientes e restrição dietética em 7. Os pacientes acompanhados apresentaram resposta favorável ao tratamento, com melhora ou remissão dos sintomas. Onze pacientes que foram submetidos a endoscopia de controle pós-tratamento apresentaram diminuição significativa do número de eosinófilos no esôfago. Conclusões - A esofagite eosinofílica deve ser considerada quando há sintomas de refluxo, que não respondem ao tratamento habitual. Os exames endoscópicos devem ser acompanhados de biopsias com análise detalhada do número de eosinófilos.Background - Eosinophilic esophagitis is a recently described entity with esophageal symptoms like gastroesophageal reflux disease and significant esophageal eosinophilic infiltration. Aim - To present our clinical series of 29 children with eosinophilic esophagitis, describing the clinical and diagnostic features, treatment and outcome. Methods - We describe 29 patients (22 boys), 1-18 years-old, with 20 eosinophils per high-power field in esophageal biopsy specimens and absence of eosinophilic inflammation in the stomach and duodenum. Evaluation of the clinical, endoscopic and histologic findings, treatment and outcome was undertaken. Results - The most common presenting symptoms included vomiting in 15 patients (52%) and abdominal pain in 11 patients (38%). Children under the age of 4 years presented with feeding disorder and failure to thrive. Patients between 5 and 8 years of age presented commonly with abdominal pain or symptoms that may be associated with reflux (heartburn and/or vomiting). Patients over the age of 8 presented most often with abdominal pain, dysphagia and occasional food impaction. Endoscopic features included vertical furrowing in 14 patients (48%), whitish papules in 12 (41%), corrugated rings in 2 patients (7%) and esophageal erosions in 3 patients (10%). In seven patients endoscopy was normal (24%). Treatment included swallowed fluticasone propionate in 19 patients and restriction diet in 7 patients. Patients who returned for follow-up had either improvement or remission of symptoms. After treatment, endoscopic biopsies were repeated in 11 patients, and a significant decrease in esophageal eosinophil counts was observed. Conclusions - The diagnosis of eosinophilic esophagitis must be considered when symptoms of reflux do not respond to conventional treatment. Upper gastrointestinal endoscopy must be complemented by a detailed analysis of histologic findings and eosinophil counts