目的 探讨广州地区老年人维生素D水平及其与骨密度、甲状旁腺激素的相关性。方法 收集2016年6月—12月在广州市第一人民医院老年病科就诊的患者。检测25-羟维生素D、甲状旁腺激素、Ⅰ型前胶原氨基端前肽、β-Ⅰ型胶原C端肽、腰椎和髋部骨密度。将患者分为维生素D缺乏组(≤20 ng/mL)、维生素D不足组(20～30 ng/mL)、维生素D充足组(≥30 ng/mL)。结果 ①426例研究对象的平均年龄是(79.77±7.69)岁,25羟维生素D平均值是(20.38±8.20)ng/mL。维生素D缺乏、不足、充足者比例分别是53%(226/426)、34.3%(146/426)、12.7%(54/426)。②25羟维生素D水平随年龄增加而降低。25羟维生素D与股骨颈和全髋骨密度呈正相关(r=0.18,P＜0.001),与甲状旁腺激素呈负相关(r=-2.05,P＜0.001)。结论 广州地区老年人维生素D不足及缺乏十分普遍。维生素D与股骨颈、髋部骨密度呈正相关,与甲状旁腺激素呈负相关。

Objective To investigate the vitamin D level of elder people in Guangzhou and the relationship in vitamin D, bone mineral density and parathyroid hormone. Methods To screening elderly patients in the geriatric department of Guangzhou First peoples Hospital from June to December 2016.Serum 25-hydroxy vitamin D,parathyroid hormone,procollagen typeⅠN-terminal propeptide,β-crosslaps of C-telopeptide of typeⅠcollagen,bone mineral density were measured.Three groups were divided according to the serum 25(OH)D level,including deficiency group(≤20 ng/mL),insufficiency group(20-30 ng/mL) and sufficiency group(≥30 ng/mL). Results The mean age of the 426 subjects was 79.77±7.69 years old. The average level of 25(OH)D was 20.38±8.20 ng/mL. The proportion of vitamin D deficiency, insufficient and sufficient persons were 53% (226/426), 34.3% (146/426), and 12.7% (54/426). The level of 25 hydroxy vitamin D was decreased with age.Correlation analysis showed that 25 hydroxy vitamin D level was positive correlated with the femoral neck and total hip bone density(r=0.18,P＜0.001),was negatively correlated with parathyroid hormone(r=-2.05,P＜0.001). Conclusion Vitamin D deficiency or insufficiency is highly prevalent in elderly men in Guangzhou.25 hydroxy vitamin D level was positive correlated with the femoral neck and total hip bone density, negatively correlated with parathyroid hormone.

目的 了解2014年广州地区儿童专科医院的病原菌分布及耐药情况与全国细菌耐药监测网(CARSS)公布数据的异同点,并提出相关用药建议,为儿童临床合理应用抗生素提供科学依据。方法 将2014年本中心儿童院区检测的儿童细菌耐药数据与同期国家卫生计生委合理用药专家委员颁布的CARSS数据进行比较。结果 儿童医院与CARSS数据比较,革兰阳性菌比例较高(49.8% vs 28.5%),革兰阴性菌比例较低(50.2% vs 71.5%);肺炎链球菌、化脓性链球菌及流感嗜血杆菌检出率较高;耐药率明显升高的是肺炎链球菌对青霉素耐药率(33.2% vs 4.3％),耐药率明显降低的是鲍曼不动杆菌对碳青霉烯类耐药率(10.3% vs 57.0％),大肠埃希菌对喹诺酮类耐药率(27.6% vs 54.3％)。结论 广州地区儿童病原菌分布及耐药情况与CARSS数据比较有一定差异,特别是儿童主要致病菌肺炎链球菌对青霉素耐药的形势严峻,经验性抗感染治疗时需考虑本地及儿童的病原菌特殊性。

目的 了解广州地区儿童患者分离的社区获得性耐甲氧西林金黄色葡萄球菌(CA-MRSA)临床分离株的分子特征。方法 收集2009年—2014年我院分离获得的65株CA-MRSA临床分离株,PCR法检测杀白细胞素(PVL)基因阳性菌株,多位点基因序列类型(MLST)测定MRSA菌株的序列类型,多重PCR法对MRSA菌株进行葡萄球菌mec盒式染色体(SCCmec)分型。结果 65株CA-MRSA分离株中PVL基因阳性31株,阳性率47.69%;MLST分型表明以ST5933.84%(22/65)及ST8823.07%(15/65)为主;SCCmec分型中发现3种类型,分别为SCCmecⅡ 32.30%(21/65)、SCCmecⅣ 49.23%(32/65)及SCCmecⅤ 18.46%(12/65),未存在未能分型菌株。结论 广州地区儿童患者分离的CA-MRSA临床分离株的PVL基因阳性率相对较高,SCCmecIV型、V型可形成小范围内的流行,其基因表型存在多种ST分型。

Objective To investigate the molecular characteristic of Community-acquired Methicillin-resistant Staphylococcus aureus(CA-MRSA) isolates from pediatric patients in Guangzhou. Methods 65 non-duplicate strains of Community-acquired Methicillin-susceptible Staphylococcus aureus(CA-MSSA) isolated from our hospital in 2009-2014 were investigated. Panton-valentine leukocidin(PVL) gene was detected by polymerase chain reaction(PCR). The sequence type (ST) of each strain was determined by muhilocus sequence typing (MLST). The genotypes of staphylococcal cassette chromosome mec(SCCmec) of the CA-MRSA isolates were confirmed by multiplex PCR. Results Among 65 isolates of CA-MRSA, the positive rate of PVL genes was 47.69%(31／65). The most common MLST type was ST59 (n=22, 33.84%), followed by ST88 (n=15, 23.07%). Three SCCmec types were found. The most common type was SCCmecIV (49.23%, 32/65), followed by SCCmecⅡ (32.30%, 21/65) and SCCmecV (8.46%, 12/65). Conclusion The PVL gene-positive rate of CA-MRSA isolates in our hospitals is at a relatively high level. SCCmec type IV and SCCmec type V could spread among hospitals and cause a small scale epidemic. Their phenotypes have a variety of ST types.

目的 分析过敏性疾病儿童过敏原的种类和特点。方法 采用国产欧博克试剂盒(酶联免疫法)对174例过敏性疾病患儿进行食物及吸入性过敏原特异性IgE(SIgE)检测,比较≤3岁和＞3岁两组患儿SIgE阳性率。结果 过敏性疾病患儿SIgE检测阳性率达72.99%(127/174),排名前2位的是:屋尘螨/粉尘螨(39.66%,69/174)、屋尘(26.44%,46/174)。≤3岁组食物性过敏原阳性率33.93%(19/56),吸入性过敏原阳性率44.64%(25/56),＞3岁组食物性过敏原阳性率41.53%(49/118),吸入性过敏原阳性率61.02%(72/118);127例阳性病例中, 96例对≥2种过敏原呈阳性反应, 69例SIgE等级≥3,＞3岁组混合过敏率及高度过敏率高于≤3岁组。结论 广州地区过敏性疾病儿童以吸入性过敏为主,主要过敏原是屋尘螨/粉尘螨、屋尘,随着年龄增长,吸入性过敏原阳性率升高,混合过敏的机率增加。建议对过敏疾病患儿进行过敏原检测,以制定相应环境干预措施及特异性脱敏治疗方案。

Objective To inverstigate the types and characteristics of allergen in children in different age with allergic diseases. Methods The food and inhalant allergen-specifi IgE(SIgE) were detected by the domestic specific IgE Screening ELISA kit in 174 children with allergic diseases,and were compared among children aged ≤3 and ＞3 years. Results 72.99%(127/174) of children with allergic diseases were positive for SIgE,the common allergen were dermatophagoides pteronyssinus/dermatophagoides farina and dust. In the group of ≤3 years old,the positives rate of food allergens was 33.93%(19/56),and the positives rate of aeroallergens was 44.65%(25/56).In the group of >3 years old, the positives rate of food allergens was 41.53%(49/118), the positives rate of aeroallergens was 61.02%(72/118).96 of 127(75.59%) positive cases yielded positive result to more than 2 allergens.69 patients's SIgE levels greater were ≥ 3,the mixed allergic rate and highly allergic rate of the children aged ＞3 years were higher than the children aged ≤3 years. Conclusion The children with allergic diseases in Guangzhou area were allergic mainly to inhalant allergens,especially to dermatophagoides pteronyssinus/dermatophagoides farina and dust.Aeroallergens are becoming the allergens as children grow with ages, and probability of mixture allergy is increasing.