目的分析陕西省急性弛缓性麻痹(acute flaccid paralysis,AFP)病例及接触者病毒分离和鉴定情况,为继续维持无脊髓灰质炎状态提供理论依据。方法采用描述性流行病学方法进行指标描述,将2014—2021年陕西省报告的AFP病例及接触者粪便标本...目的分析陕西省急性弛缓性麻痹(acute flaccid paralysis,AFP)病例及接触者病毒分离和鉴定情况,为继续维持无脊髓灰质炎状态提供理论依据。方法采用描述性流行病学方法进行指标描述,将2014—2021年陕西省报告的AFP病例及接触者粪便标本,采用转人类脊髓灰质炎病毒受体小鼠肺细胞(mouse cell line expressing the gene for human cellular receptor for Poliovirus,L20B)系和人横纹肌肉瘤(rhabdomyosarcoma,RD)细胞,根据WHO《脊髓灰质炎实验室手册》开展脊髓灰质炎病毒(Poliovirus,PV)检测,对L20B阳性分离物采取逆转录-聚合酶链式反应(RT-PCR)法扩增VP1区片段,同时开展核苷酸序列测定分析。结果从1104份AFP病例及接触者粪便标本检出7份PV阳性,14株PV,分离率为0.63%,分离非脊髓灰质炎肠道病毒(non-polio Enteroviruses,NPEV)36株,分离率为3.26%。相比昆明株和Sabin株,脊髓灰质炎病毒VP1区核苷酸<6个变异的为13株,1株发生9个变异;NPEV阳性分离例数7月和8月较多,占总数的30.56%。结论陕西省AFP监测系统运行良好,2014—2021年未发现野生型脊髓灰质炎病毒(wild Poliovirus,WPV)及疫苗衍生脊髓灰质炎病毒(vaccine-derived Poliovirus,VDPV),继续保持无脊髓灰质炎状态。展开更多
Objective:To evaluate the polio laboratory surveillance carried out from January,2019 to May,2023 by the Polio Regional Reference Laboratory,Sri Lanka.Methods:This retrospective study analyzed all stool samples receiv...Objective:To evaluate the polio laboratory surveillance carried out from January,2019 to May,2023 by the Polio Regional Reference Laboratory,Sri Lanka.Methods:This retrospective study analyzed all stool samples received under the acute flaccid paralysis(AFP)and immunodeficient vaccine-derived poliovirus(VDPV)surveillance at Polio Regional Reference Laboratory,Sri Lanka from January,2019 to May,2023.The results of the testing methodologies were extracted from the laboratory data system,i.e.,poliovirus virus isolation,intra-typic differentiation/VDPV real time reverse transcriptase polymerase chain reaction(ITD/VDPV rRTPCR)and sequencing,along with the data on timing of reporting results,stool adequacy and socio-demographics.Data was analyzed using descriptive statistics.Results:A total of 2141 stool samples from 1644 cases were received for AFP surveillance from Sri Lanka(93.61%),Maldives(1.52%),and immunodeficient VDPV(4.86%)surveillance.Both polioviruses(19/1644,1.15%)and non-polio enteroviruses(73/1644,4.44%)were isolated,while Sabin-like 3 virus was detected in majority(12/19,63.15%)among the poliovirus isolated.Wild polioviruses or circulating VDPVs were not detected among the cases.During all years of the study,the non-polio AFP detection rate was>1/100000 in children aged less than 15 years,whereas stool adequacy rate was>80%.All results were reported within 14 days of receipt,ensuring timely reporting as per global guidelines.Conclusions:The Polio Regional Reference Laboratory,Sri Lanka plays a vital role in maintaining the polio-free status in the country through its robust laboratory surveillance,while adhering to the surveillance indicators.Non-detection of wild polioviruses and circulating VDPV during the study period reinforces the polio-free status in the country.展开更多
On October 7th,2023,a devastating conflict erupted between Gaza and Israel,causing around 40000 deaths and over 90000 injuries.The war has displaced more than 1.9 million people,who now live in overcrowded tent camps ...On October 7th,2023,a devastating conflict erupted between Gaza and Israel,causing around 40000 deaths and over 90000 injuries.The war has displaced more than 1.9 million people,who now live in overcrowded tent camps facing severe shortages of clean water,sanitation,fuel,electricity,and food.Many rely on international aid and resort to unsafe methods for basic needs[1].The Gaza Strip,a tiny coastal area of just 365 square kilometers with 2.3 million residents,is one of the world's most densely populated regions.Already burdened by inadequate infrastructure,the ongoing war has worsened conditions,caused the collapse of sewage and water systems and severely disrupted daily life.This devastation has created a breeding ground for infectious diseases,especially among the displaced people living in overcrowded camps[2,3].展开更多
文摘目的分析陕西省急性弛缓性麻痹(acute flaccid paralysis,AFP)病例及接触者病毒分离和鉴定情况,为继续维持无脊髓灰质炎状态提供理论依据。方法采用描述性流行病学方法进行指标描述,将2014—2021年陕西省报告的AFP病例及接触者粪便标本,采用转人类脊髓灰质炎病毒受体小鼠肺细胞(mouse cell line expressing the gene for human cellular receptor for Poliovirus,L20B)系和人横纹肌肉瘤(rhabdomyosarcoma,RD)细胞,根据WHO《脊髓灰质炎实验室手册》开展脊髓灰质炎病毒(Poliovirus,PV)检测,对L20B阳性分离物采取逆转录-聚合酶链式反应(RT-PCR)法扩增VP1区片段,同时开展核苷酸序列测定分析。结果从1104份AFP病例及接触者粪便标本检出7份PV阳性,14株PV,分离率为0.63%,分离非脊髓灰质炎肠道病毒(non-polio Enteroviruses,NPEV)36株,分离率为3.26%。相比昆明株和Sabin株,脊髓灰质炎病毒VP1区核苷酸<6个变异的为13株,1株发生9个变异;NPEV阳性分离例数7月和8月较多,占总数的30.56%。结论陕西省AFP监测系统运行良好,2014—2021年未发现野生型脊髓灰质炎病毒(wild Poliovirus,WPV)及疫苗衍生脊髓灰质炎病毒(vaccine-derived Poliovirus,VDPV),继续保持无脊髓灰质炎状态。
文摘目的评估2012—2022年陕西省脊髓灰质炎(简称“脊灰”)实验室所用细胞系对脊灰病毒细胞敏感性(cell sensitivity,CS)的监测,为保持无脊灰状态提供质量保证。方法选择陕西省脊灰实验室2005年制备的实验室质量控制(laboratory quality control,LQC)标准Sabin株Ⅰ﹑Ⅱ﹑Ⅲ型,以及国家脊灰实验室(National Polio Laboratory,NPL)提供的转人脊灰病毒受体的小鼠肺细胞(mouse L cells expressing the human Poliovirus receptor,L20B)系、人横纹肌肉瘤(human rhabdomyosarcoma,RD)细胞,采用96孔微量培养板滴定法测定陕西省疾病预防控制中心脊灰实验室2012—2022年所用细胞系对脊灰病毒敏感性,使用Karber公式计算病毒滴度,并对检测结果进行分析描述。结果RD细胞均数±标准差:Ⅰ型(7.57±0.19),Ⅱ型(7.55±0.11),Ⅲ型(7.78±0.17);L20B均数±标准差:Ⅰ型(6.80±0.25),Ⅱ型(6.83±0.25),Ⅲ型(6.74±0.23)。与陕西省疾病预防控制中心脊灰实验室的LQC株的参考值相比其滴度均在±0.5log 10CCID_(50)/0.1ml以内波动。结论2012—2022年陕西省脊灰实验室所用细胞系对脊灰病毒敏感性较好,敏感性未下降,为陕西省维持无脊灰状态提供了坚强的保障。
文摘Objective:To evaluate the polio laboratory surveillance carried out from January,2019 to May,2023 by the Polio Regional Reference Laboratory,Sri Lanka.Methods:This retrospective study analyzed all stool samples received under the acute flaccid paralysis(AFP)and immunodeficient vaccine-derived poliovirus(VDPV)surveillance at Polio Regional Reference Laboratory,Sri Lanka from January,2019 to May,2023.The results of the testing methodologies were extracted from the laboratory data system,i.e.,poliovirus virus isolation,intra-typic differentiation/VDPV real time reverse transcriptase polymerase chain reaction(ITD/VDPV rRTPCR)and sequencing,along with the data on timing of reporting results,stool adequacy and socio-demographics.Data was analyzed using descriptive statistics.Results:A total of 2141 stool samples from 1644 cases were received for AFP surveillance from Sri Lanka(93.61%),Maldives(1.52%),and immunodeficient VDPV(4.86%)surveillance.Both polioviruses(19/1644,1.15%)and non-polio enteroviruses(73/1644,4.44%)were isolated,while Sabin-like 3 virus was detected in majority(12/19,63.15%)among the poliovirus isolated.Wild polioviruses or circulating VDPVs were not detected among the cases.During all years of the study,the non-polio AFP detection rate was>1/100000 in children aged less than 15 years,whereas stool adequacy rate was>80%.All results were reported within 14 days of receipt,ensuring timely reporting as per global guidelines.Conclusions:The Polio Regional Reference Laboratory,Sri Lanka plays a vital role in maintaining the polio-free status in the country through its robust laboratory surveillance,while adhering to the surveillance indicators.Non-detection of wild polioviruses and circulating VDPV during the study period reinforces the polio-free status in the country.
文摘On October 7th,2023,a devastating conflict erupted between Gaza and Israel,causing around 40000 deaths and over 90000 injuries.The war has displaced more than 1.9 million people,who now live in overcrowded tent camps facing severe shortages of clean water,sanitation,fuel,electricity,and food.Many rely on international aid and resort to unsafe methods for basic needs[1].The Gaza Strip,a tiny coastal area of just 365 square kilometers with 2.3 million residents,is one of the world's most densely populated regions.Already burdened by inadequate infrastructure,the ongoing war has worsened conditions,caused the collapse of sewage and water systems and severely disrupted daily life.This devastation has created a breeding ground for infectious diseases,especially among the displaced people living in overcrowded camps[2,3].
