目的 分析不同年龄、不同季节河源市源城区呼吸道感染的病原学情况,指导临床用药。方法 回顾性研究2020年3月—2022年2月2 468例呼吸道感染的住院患儿,取咽部分泌物送广州达安临床检验中心进行呼吸道核酸六项检测并分析结果。包括：肺炎链球菌（Sp）、呼吸道合胞病毒（RSV）、卡他莫拉菌（MC）、流感嗜血杆菌（Hi）、肺炎支原体（LP）、腺病毒（ADV）。结果 （1）2 468例患儿的标本中阳性率52.8%,其中RSV最高,其他依次为Sp、Hi、MC、MP、ADV。而混合感染仅次于RSV。（2）婴儿组和幼儿组以RSV感染为主,在学龄前组和学龄组儿童中,以Sp感染为主,各病原体的混合感染组合很多,一种细菌合并一种病毒多见。（3）秋冬季是河源市源城区呼吸道感染的高发季节,RSV是秋冬季呼吸道感染最主要的病原体。结论 秋冬季节为河源市源城区呼吸道感染的高发季节,RSV为该季节的主要病原体。RSV也是婴幼儿组感染的主要致病菌,随着年龄增大,细菌感染导致的呼吸道疾病逐渐占优势。混合感染在各年龄组中均占比较高,值得临床诊疗的重视。

Objective To analyze the etiology of respiratory tract infection in Yuancheng District of Heyuan City ,which was in different ages and seasons,and to provide guidance of clinical drug usage．Methods Cases of 2 468 hospitalized children with respiratory tract infection from March 2020 to February 2022 were analyzed．The secretion from pharynx was collected and sent to Guangzhou Da’an Clinical Examination Center for six respiratory nucleic acid tests and then the results were analyzed,including Streptococcus pneumoniae（Sp）,respiratory syncytial virus（RSV）,Moraxella catarrhalis（MC）,Haemophilus influenzae（Hi）,Mycoplasma pneumonia（MP）,adenovirus（ADV）．Results The positive rate of 2 468 hospitalized children with respiratory tract infection was 52.8%,of which the highest was RSV,followed by Sp,Hi,MC,MP,ADV．Meanwhile the mixed infection rate was second to RSV．RSV infection was the main infection in infant group and early-aged children group,while in preschool group and school-aged group,Sp infection was the main infection．There were many mixed infection of pathogen,and one bacteria combined with one virus was more common．Respiratory tract infection had high incidence in autumn and winter in Yuancheng District of Heyuan City,RSV was the major pathogen．Conclusions Autumn and winter were the seasons with high respiratory tract infection incidence in Yuancheng District of Heyuan City,and RSV was the main pathogen in these two seasons．RSV was also the main pathogen of infant group infection．But with the increase of children’s age,bacterial infection became the main reason of respiratory tract diseases．Mixed infection accounts for a high proportion in all age groups,which should be valued in clinical diagnosis and treatment．

目的 分析河源市学龄前儿童发生小细胞低色素性贫血的病因。方法 对我院进行健康体检小细胞低色素性贫血儿童287例进行血常规、血清铁蛋白及地中海贫血基因检测。结果 在所研究的287 例小细胞低色素性贫血儿童病例中,分别检出 α地中海贫血 127例,β地中海贫血 48例,α/β复合地中海贫血2例;铁缺乏 83例 (合并地中海贫血20例, 缺铁性贫血45例),不明原因贫血47例。地中海贫血检出率为61.67%,铁缺乏检出率为21.95% 。结论 地中海贫血是河源市学龄前儿童发生小细胞低色素性贫血最主要的原因,其次是铁缺乏,各年龄段儿童以轻度贫血为主,6月~1岁,1~3岁为铁缺乏高发年龄。α地中海贫血基因型以--^SEA/αα最常见,β地中海贫血以βIVS-II-654/β^N最常见,小细胞低色素症在静止型最常见。

Objective To analyze the causes of microcytic hypochromic anemia in preschool children in Heyuan City. Methods A total of 287 cases with microcytic hypochromic anemia were selected in our hospital. The indexes of hematology, serum ferritin were detected and genetic testing for thalassemia was performed. Results Through genetic analysis, 127 of 287 cases of microcytic hypochromic anemia were confirmed with α-thalassaemia,48 cases with β-thalassaemia,2 cases with compound α/β-thalassaemia and 83 cases with iron deficiency (20 thalassemia cases and 45 iron deficiency anemia cases). Thalassaemia detection rate was 61.67%, iron deficiency detection rate was 21.95%. Conclusion Thalassaemia was the main reason of microcytic hypochromic anemia in preschool children in Heyuan City, followed by iron deficiency. The mild anemia was the main type among all age groups, children aged 0.5-3 had higher iron deficiency rate. The main type of α-thalassaemia was --^SEA/αα, the main type of β-thalassaemia was βIVS-II-654/β^N and the main type of microcytic hypochromic was static type.