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Etiological and Radiological Profile of Acute Lower Respiratory infections during the Pre-COViD Period in the Paediatric Ward of the Teaching Hospital of Mali and in the Community Health Centre of Yirimadio in Bamako

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Open Journal of Pediatrics 2023年第2期13卷 262-275页

作者： Bourama Kané Mariam Maiga Oumou Koné Korotoumou Wélé Diallo Aboubacar Sangaré Mody Abdoulaye Camara Mariam Doumbia Abdoul Karim Sangaré Bréhima Traoré lassine G. Timbiné ibrahima Cissé Ahmadou i. Dramé Bréhima Kouriba Department of Paediatrics CHU Hôpital du Mali Bamako Mali Paediatric Department of the Centre de Santé de Référence de la Commune Vi Bamako Mali National institute of Public Health Bamako Mali Medical imaging department of the CHU Hôpital du Mali Bamako Mali Charles Mérieux infectious Diseases Centre Bamako Mali Centre de Santé Communautaire de Yirimadio Bamako Mali Department of Anaesthesia and intensive Care CHU Hôpital du Mali Bamako Mali

introduction: Every year, nearly 4 million people pass away from acute respiratory infections. 98% of such deaths are due to lower respiratory tract infections. Even though studies have been carried on lower respiratory infections x-ray aspects in Mali, very few studies have been done to reveal bacteriological and virological evidence of this disease. Materials and methods: it is about a descriptive prospective study carried out from January to December 2018 having involved patients of all ages, coming for medical consultation at the Yirimadio Community-based health center as well as children from 6 months to 15 years old coming at the pediatric department of UHC Hôpital du Mali for a lower respiratory infection. They had all undergone chest X-ray and a PCR. The purpose: of this work is to study etiological and x-ray aspects of acute lower respiratory infections at the Yirimadio Community-based Health Center and at the UHC pediatric department of Hôpital du Mali. Findings: From January to December 2018, we recorded a frequency of 1.19%. The age group 0 - 5 years was the most represented (64.5%) with a sex ratio of 0.97 for women. Cough was the most common clinical sign (98.7%) followed by fever (58.9%). Standard frontal chest X-ray was pathological in 70% of our patients. it was bronchitis in 75.4% of cases, pneumonia (13.5%), and bronchopneumonia (12.3%). PCR positive was in 83.9% of patients. it revealed a co-infection in more than half of the patients (52.5%), bacterial infection (16.1%) and viral infection (15.2%). Pathogens isolated ranked by frequency were Streptococcus pneumoniaa (87.6%) followed by Staphylococcus aureus (24.9%) and human rhinovirus (17%). The most common viral causes were human rhinovirus (17%), followed by influenza A and B virus (7%) and human parainfluenza virus (7%). Conclusion: it stemed from the study that lower respiratory infections were mainly due to Streptococcus pneumonea and human rhinovirus during pre-COViD at the Yirimadio Comm

关键词： Lower Respiratory infections Etiologies Children Mali

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以单分散纳米二氧化硅颗粒为基质稀土掺杂Tb^(3+)的发光材料的制备与性质研究

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内蒙古师范大学学报（自然科学汉文版） 2009年第6期38卷 689-693页

作者：齐霞王喜贵薄素玲娜米拉内蒙古师范大学化学与环境科学学院内蒙古呼和浩特010022

通过Stober溶胶-凝胶法合成了大小约为80~100 nm的纳米二氧化硅微球及Tb3+掺杂的单分散纳米二氧化硅微球,利用iR、SEM对样品的结构、形貌进行表征.结果表明,经过600℃退火处理后的材料,其红外光谱显示样品中只存在Si-O-Si的网状结构,其... 详细信息

通过Stober溶胶-凝胶法合成了大小约为80~100 nm的纳米二氧化硅微球及Tb3+掺杂的单分散纳米二氧化硅微球,利用iR、SEM对样品的结构、形貌进行表征.结果表明,经过600℃退火处理后的材料,其红外光谱显示样品中只存在Si-O-Si的网状结构,其他有机物基本被除净;SEM显示样品为球形颗粒,具有一定的分散性,并达到了纳米级.用激发光谱、发射光谱及三维光谱对样品的发光性质进行分析,样品能够发射出Tb3+的特征发射峰,分别是469 nm(5D3-7F3)、488 nm(5D4-7F6)、544 nm(5D4-7F5)、584 nm(5D4-7F4)跃迁发射.与体相材料相比,虽然纳米发光材料由于表面效应产生的表面缺陷影响了Tb3+的发光效率,但稀土离子掺杂量的猝灭浓度界限得到了提高,且通过该方法合成的样品粒度较均匀,团聚性小,无需研磨,化学性质稳定,透明性好.这些性质有望使该材料成为有潜在应用价值的发光材料.

关键词：单分散纳米SiO2 稀土Tb3+ 溶胶-凝胶法发光性质

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