Metagenomic Analysis of Environmental Samples from Wildlife Rescue Station at Poyang Lake,China

ObjectiveTo improve the understanding of the virome and bacterial microbiome in the wildlife rescue station of Poyang Lake, China.MethodsTen smear samples were collected in March 2019 Metagenomic sequencing was performed to delineate bacterial and viral diversity. Taxonomic analysis was performed using the Kraken2 and Bracken methods. A maximum-likelihood tree was constructed based on the RNA-dependent RNA polymerase (RdRp) region of picornavirus.ResultsWe identified 363 bacterial and 6 viral families. A significant difference in microbial and viral abundance was found between samples S01–S09 and S10. In S01–S09, members of Flavobacteriia and Gammaproteobacteria were the most prevalent, while in S10, the most prevalent bacteria class was Actinomycetia. Among S01–S09, members of Myoviridae and Herelleviridae were the most prevalent, while the dominant virus family of S10 was Picornaviridae. The full genome of the pigeon mesivirus-like virus (NC-BM-233) was recovered from S10 and contained an open reading frame of 8,124 nt. It showed the best hit to the pigeon mesivirus 2 polyprotein, with 84.10% amino acid identity. Phylogenetic analysis showed that RdRp clustered into Megrivirus B.ConclusionThis study provides an initial assessment of the bacteria and viruses in the cage-smeared samples, broadens our knowledge of viral and bacterial diversity, and is a way to discover potential pathogens in wild birds     

江西省高安市两株汉城病毒分离鉴定及全基因组序列分析

目的 对2021年江西省高安市采集的鼠肺样本进行肾综合征出血热汉坦病毒分离鉴定及全基因组序列进行分析.方法 采用Vero-E6细胞分离肾综合征出血热汉坦病毒,采用实时荧光RT-PCR法和直接免疫荧光法对分离株进行鉴定,采用高通量测序技术对分离株进行全基因组测序,采用CLC、MEGA7.0等软件对基因组序列进行分析.结果...     

Impact of serum uric acid on subclinical myocardial injury in general population

Background and aimsHyperuricemia is widely thought as a risk factor for myocardial infarction (MI) and all-cause mortality; however, the relation of serum uric acid (sUA) and subclinical myocardial injury (SCeMI) remains unclear. We hypothesize that sUA is associated with subclinical myocardial injury.Methods and resultsA total of 5880 adult individuals (57.9 ± 13.0 years, 54.23% women) without known cardiovascular disease from National Health and Nutrition Examination Survey (NHANES) III were included. Determined by Cardiac Infarction Injury Score (CIIS) from 12-lead electrocardiogram, SCeMI was defined by CIIS ≥10 units. The relationship between sUA and SCeMI was analyzed by using logistic regression models and the smooth curve fitting. Subgroup analyses were conducted. After adjusting for potential confounding variables, the smooth curve fitting revealed a non-linear relationship between sUA level and SCeMI. When sUA was above the inflection point 266.5 μmol/L, each 100 unit increase in sUA increase the risk of SCeMI by 15%. In women group, when sUA>340.3 μmol/L, each 100 unit increase in sUA increase the risk of SCeMI by 71%, but no significant correlation was observed in men group.ConclusionsOur findings confirm that sUA is an independent risk factor for subclinical myocardial injury after adjusting for potential confounding variables, and existence of such an association in women only, which require more random control trials to confirm the strategy of cardiovascular disease prevention based on sUA reduction in female.     

多重PCR快速检测3种食源性致病菌

目的建立一种能同时检测金黄色葡萄球菌、产单核李斯特菌和沙门菌3种致病菌的多重PCR检测方法。方法采用LB培养液对金黄色葡萄球菌、产单核李斯特菌和沙门菌标准菌株进行增菌。根据金黄色葡萄球菌的nuc基因、产单核李斯特氏菌的hlvA基因、沙门氏菌的invA基因设计引物,通过多重聚合酶链反应（PCR）对上述3种食源性致病菌的目的基因进行扩增,同时对反应体系进行优化。结果对平均浓度为5cfu／ml的金黄色葡萄球菌、产单核李斯特菌和沙门氏菌在LB培养液中进行8h振荡培养,可以检出阳性结果;把金黄色葡萄球菌、产单核李斯特菌、沙门菌、志贺菌、蜡样芽孢杆菌、大肠埃希菌0157、阪崎肠杆菌7种菌混合在一起提取混合基因组DNA进行PCR扩增,显示出很好的特异性结果。结论建立的多重PCR检测方法适用于金黄色葡萄球菌、产单核李斯特菌和沙门菌的快速检测,具有快速、简便、灵敏的特点,可广泛应用于食品卫生检测、食物中毒应急处理和临床检验等领域。     

赣州市5例恙虫病调查报告

5例病人均有发热及典型的焦痂体征，焦痂率达80％，恢复期血清抗体阳性，对强力霉素高度敏感。发病时间为6、7月份。男女均有发病，以农民为主，均有野外作业史，呈散在流行。调查首次证明赣州市有恙虫病的存在，流行病学特征明显。     

《血吸虫病防治知识与行为题库》预试验

目的检验《血吸虫病防治知识与行为题库》（《题库》）编写的科学性、严谨性、可行性、适用性和可理解性,并征求进一步修改和完善的意见与建议。方法随机选择江西和四川两省93名血防专业人员、血吸虫病疫区121名学生和107名成年村民为预试验对象。采用“专题小组讨论”法对《题库》进行预试验。结果认为《题库》具有科学性、严谨性、可行性、适用性和可理解性的预试验对象分别占72.04%、92.47%、68.82%、81.14%和70.13%,同时对某些题项提出修改完善意见。结论《题库》经修改完善后可用于疫区现场血吸虫病健康教育效果调查与评价。     

FE-2粪便分析工作站在人群寄生虫病调查中的应用

目的评价FE-2粪便分析工作站在人群寄生虫病调查中的应用价值。方法由同一检验人员对同一份样品分别采用改良加藤法和FE-2粪便分析工作站法进行检测,比较2种方法的寄生虫检出率、耗时和成本等。结果 FE-2粪便分析工作站法对寄生虫的检出率为改良加藤法的1.198倍,其实际操作时间较后者缩短44%,但成本是后者的1.4倍。结论 FE-2粪便分析工作站法可提高寄生虫感染的检出率,在经济条件许可的情况下,值得推广应用。     

日本血吸虫病常用诊断方法现场查病效果的评估

目的 评估几种常用血吸虫病诊断方法现场查病的效果。 方法 2005年11月，选取江西省鄱阳湖沿岸3个血吸虫病流行村的6~65岁居民为调查对象，用改良加藤厚涂片法（Kato-Katz法， 3张涂片）和尼龙绢集卵孵化法进行病原学检测的同时，分别用胶体染料试纸条法（DDIA）、快速酶联免疫吸附试验（F-ELISA）及2种间接红细胞凝集试验（IHA-A和IHA-B）进行血清学检测，以评价该几种检测方法的效果。 结果 3村共检测居民1 864人，平均粪检阳性率为9.7%。改良加藤法在血吸虫病中度、重度流行区的漏检率相对稳定，为20.0%~27.8%；尼龙绢集卵孵化法的漏检率在每克粪便虫卵数（EPG）＞100时相对稳定（约25％）。DDIA、F?鄄ELISA、IHA?鄄A和IHA?鄄B的平均阳性率分别为47.8%、50.0%、66.3%和40.1%。以病原学检测结果为金标准，DDIA、F?鄄ELISA、IHA-A和IHA-B的敏感性分别为75.3％、65.8％、85.6％和76.0%；特异性为55.1％、51.7％、35.7%和63.6％。与其他几种免疫血清学诊断方法相比，IHA?鄄B试剂的特异性、Youden指数、阳性似然比及粪检符合率最高。DDIA法与IHA-B法的符合率最高（77.3％），而F-ELISA和IHA-A的符合率最低（61.5％）。 结论 在血吸虫病中、重度流行区，改良加藤法虫卵检出率和稳定性均优于尼龙绢集卵孵化法；IHA-A的敏感性最高，IHA-B的4个指标最高，具有较高的现场使用价值，但需进一步提高其敏感性。     

鄱阳湖区以传染源控制为主的血吸虫病综合防治策略研究

目的探索以传染源控制为主的湖区血吸虫病综合防治新策略,观察其防治效果。方法在鄱阳湖区血吸虫病重度流行区进贤县三里乡爱国村、新和村和光辉村全面实施以机代牛、封洲禁牧、改水改厕和人居环境改造为主要内容的传染源控制措施,并辅以人畜化疗和健康教育,连续4年定期监测人群血吸虫和肠道寄生虫感染情况、钉螺感染率、水体危险性、虫卵对环境污染状况变化。结果综合防治措施实施4年后,人群血吸虫感染率显著下降,原属一类疫区的爱国村由试点前2004年的11.35%下降至2008年的0.18%,下降幅度为98.41%;二类疫区的新和村和三类疫区的光辉村均下降至0。人群血吸虫感染度亦呈逐渐下降趋势。人群蛔虫和鞭虫感染率分别由2005年的27.57%和61.98%下降至2008年的3.82%和7.47%。虫卵对环境的污染明显减轻。试点区草洲感染螺点数2004年为49个,2008年无感染螺点;感染螺平均密度、钉螺感染率、感染螺点数和水体危险性均大幅度下降。结论以传染源控制为主的血吸虫病综合防治措施可在短期内控制血吸虫病传染源,取得净化草洲、有效防制人群再感染的效果,亦有利于改变疫区农民的生产结构和生产方式,并减轻其他肠道寄生虫病流行。