Objective:To detect and characterize Chlamydophila psittaci(C.psittaci) in asymptomatic feral pigeons in central Thailand.Methods:A total 814 swabs from the trachea and cloacae of 407non-clinical feral pigeons in cent...Objective:To detect and characterize Chlamydophila psittaci(C.psittaci) in asymptomatic feral pigeons in central Thailand.Methods:A total 814 swabs from the trachea and cloacae of 407non-clinical feral pigeons in central Thailand were collected and tested for the presence of C.psittaci.Results:A 10.8%of feral pigeons in the sample group were positive as determined by nested PCR primer specific to C.psittaci.The outer membrane protein A(orupA) gene of positive samples exhibited amino acid identity of C.psittaci ranging from 71 to 100%and were grouped in genotype B.Exceptionally,BF1676-56 isolate was closely related to Chlamydia avium with99%identification of the I6 S ribosomal(r) RNA gene.Conclusions:This is the first report on C.psittaci isolated from asymptomatic feral pigeons in Thailand,which provides knowledge for the disease status in pigeon populations in Thailand.展开更多
Chlamydophila psittaci(Lillie,1930)Everett et al.,1999,the pathogenic agent of human ornithosis,is widespreadin feral pigeon populations and many cases of transmission from feral pigeons to humans have been reported.T...Chlamydophila psittaci(Lillie,1930)Everett et al.,1999,the pathogenic agent of human ornithosis,is widespreadin feral pigeon populations and many cases of transmission from feral pigeons to humans have been reported.Theaim of the present study was to detect C.psittaci in environmental samples to find out more about possibletransmission routes and,therefore,to assess the zoonotic risk for humans.Fecal samples were collected from nestboxes in a feral pigeon loft.Additionally,samples were taken from the feather dust film covering the water surface ofpublic fountains where pigeons regularly bathe.The samples were tested for the presence of chlamydial antigenusing an antigen enzyme-linked immunosorbent assay to prove shedding of C.psittaci by feral pigeons.This testdetects a genus specific lipopolysaccharide in the outer membrane of the chlamydial bacteria.Samples were testedusing the IDEIA PCE Chlamydia Test kit(DakoCytomation)and positive results were verified with IDEIA ChlamydiaBlocking Reagents(DakoCytomation).The IDEIA PCE Chlamydia Test yields a high proportion of positive results.However,when IDEIA Chlamydia Blocking was performed,most of the positive results turned out to be negative orcould not be interpreted.We conclude that antigen-enzyme-linked immunosorbent assay tests are not suitable fordetecting C.psittaci in environmental samples.Previous publications where no blocking test was used should bereconsidered critically.展开更多
目的分析经宏基因组二代测序技术(metagenopmic next generation sequencing,mNGS)确诊的28例鹦鹉热衣原体肺炎病人的临床特点。方法回顾性分析2019年10月1日至2022年4月1日长沙市第一医院采用mNGS诊断的28例鹦鹉热衣原体肺炎病人的诊...目的分析经宏基因组二代测序技术(metagenopmic next generation sequencing,mNGS)确诊的28例鹦鹉热衣原体肺炎病人的临床特点。方法回顾性分析2019年10月1日至2022年4月1日长沙市第一医院采用mNGS诊断的28例鹦鹉热衣原体肺炎病人的诊治情况。结果28例病人中10例为女性,18例为男性,中位年龄60岁;27例病人有明确禽类接触史,1例无。重症病例占32.1%,多为有慢性阻塞性肺疾病(COPD)、糖尿病、高血压、冠心病或尿毒症等基础疾病病人。临床表现包括发热(100%)、畏寒(28.6%)、咳嗽、咳痰(71.4%)、气促(53.6%)。外周血中白细胞总数多在正常范围,96.4%的病人中性粒细胞比例增高、淋巴细胞比例降低;96.4%病人PCT升高,所检测病人中ESR和CRP升高者达100%;分别有71.4%和50%病人乳酸脱氢酶和肌酸激酶增高;有82.1%的病人谷草转氨酶增高,有78.6%的病人白蛋白降低。胸部CT表现单侧病变25例、其中右肺病变19例,常见影像改变是斑片状阴影(78.6%)、大片实变(21.4%),26例伴有胸腔积液。治疗情况:单用氟喹诺酮类(莫西沙星或者左氧氟沙星)治疗9例,单用多西环素治疗2例;联合用药13例,其中青霉素类(哌拉西林他唑巴坦或头孢哌酮舒巴坦钠)联用喹诺酮类有10例,青霉素类联合多西环素3例。有2例病人初始选择青霉素类加喹诺酮类药物治疗无效,改用多西环素或联用多西环素后症状缓解。28例病人均预后良好,无死亡病例。结论鹦鹉热衣原体肺炎病人的职业史、临床表现、实验室检查结果及肺部CT具有一定的特点;临床对可疑病例应尽早行mNGS检测,快速过渡到精准治疗,能明显改善预后。展开更多
Objective;To determine the presence of zoonotic tick-borne bacteria in feral pigeons(Columba lixia domestica) from urban areas.Methods:Spleen samples from 84 feral pigeons,found dead with traumatic injuries in urban a...Objective;To determine the presence of zoonotic tick-borne bacteria in feral pigeons(Columba lixia domestica) from urban areas.Methods:Spleen samples from 84 feral pigeons,found dead with traumatic injuries in urban areas,were examined by PCR to detect DNA of Anaplasma phagocytophilum,Bartonella spp.,Borrelia burgdorferi sensu lato.Coxiella burnetii.Rickettsia spp.,and Chlamydnphila spp.Results:Twenty(23.8%) pigeons were infected by tick-borne agents,in particular 2(2.38%) animals resulted positive for Bartonella spp.,5(5.95%) for Coxiella burnetii.5(5.95%) for Rickettsia spp.,13(15.47%) for Borrelia burgdorferi sensu lato.All birds scored negative for anaplasma phagocytophilum.Moreover,17(20.23%) pigeons were positive for Chlamydophila spp.and among them 10(11.9%) for Chlamydophila psittaci,Mixed infections by two or three agents were detected in 8(9.52%) animals.Conclusions:Feral pigeons living in urban and periurban areas are a hazard for the human health as source of several pathogens.The obtained results confirm pigeons as reservoirs of chlamydial agents and suggest that they may be involved in the epidemiology of zoonotic tick-borne infections too.展开更多
基金financially supported by the Monitoring and Surveillance Center for Zoonotic Diseases in Wildlife and Exotic Animals.Faculty of Veterinary Science.Mahidol University
文摘Objective:To detect and characterize Chlamydophila psittaci(C.psittaci) in asymptomatic feral pigeons in central Thailand.Methods:A total 814 swabs from the trachea and cloacae of 407non-clinical feral pigeons in central Thailand were collected and tested for the presence of C.psittaci.Results:A 10.8%of feral pigeons in the sample group were positive as determined by nested PCR primer specific to C.psittaci.The outer membrane protein A(orupA) gene of positive samples exhibited amino acid identity of C.psittaci ranging from 71 to 100%and were grouped in genotype B.Exceptionally,BF1676-56 isolate was closely related to Chlamydia avium with99%identification of the I6 S ribosomal(r) RNA gene.Conclusions:This is the first report on C.psittaci isolated from asymptomatic feral pigeons in Thailand,which provides knowledge for the disease status in pigeon populations in Thailand.
文摘Chlamydophila psittaci(Lillie,1930)Everett et al.,1999,the pathogenic agent of human ornithosis,is widespreadin feral pigeon populations and many cases of transmission from feral pigeons to humans have been reported.Theaim of the present study was to detect C.psittaci in environmental samples to find out more about possibletransmission routes and,therefore,to assess the zoonotic risk for humans.Fecal samples were collected from nestboxes in a feral pigeon loft.Additionally,samples were taken from the feather dust film covering the water surface ofpublic fountains where pigeons regularly bathe.The samples were tested for the presence of chlamydial antigenusing an antigen enzyme-linked immunosorbent assay to prove shedding of C.psittaci by feral pigeons.This testdetects a genus specific lipopolysaccharide in the outer membrane of the chlamydial bacteria.Samples were testedusing the IDEIA PCE Chlamydia Test kit(DakoCytomation)and positive results were verified with IDEIA ChlamydiaBlocking Reagents(DakoCytomation).The IDEIA PCE Chlamydia Test yields a high proportion of positive results.However,when IDEIA Chlamydia Blocking was performed,most of the positive results turned out to be negative orcould not be interpreted.We conclude that antigen-enzyme-linked immunosorbent assay tests are not suitable fordetecting C.psittaci in environmental samples.Previous publications where no blocking test was used should bereconsidered critically.
文摘目的分析经宏基因组二代测序技术(metagenopmic next generation sequencing,mNGS)确诊的28例鹦鹉热衣原体肺炎病人的临床特点。方法回顾性分析2019年10月1日至2022年4月1日长沙市第一医院采用mNGS诊断的28例鹦鹉热衣原体肺炎病人的诊治情况。结果28例病人中10例为女性,18例为男性,中位年龄60岁;27例病人有明确禽类接触史,1例无。重症病例占32.1%,多为有慢性阻塞性肺疾病(COPD)、糖尿病、高血压、冠心病或尿毒症等基础疾病病人。临床表现包括发热(100%)、畏寒(28.6%)、咳嗽、咳痰(71.4%)、气促(53.6%)。外周血中白细胞总数多在正常范围,96.4%的病人中性粒细胞比例增高、淋巴细胞比例降低;96.4%病人PCT升高,所检测病人中ESR和CRP升高者达100%;分别有71.4%和50%病人乳酸脱氢酶和肌酸激酶增高;有82.1%的病人谷草转氨酶增高,有78.6%的病人白蛋白降低。胸部CT表现单侧病变25例、其中右肺病变19例,常见影像改变是斑片状阴影(78.6%)、大片实变(21.4%),26例伴有胸腔积液。治疗情况:单用氟喹诺酮类(莫西沙星或者左氧氟沙星)治疗9例,单用多西环素治疗2例;联合用药13例,其中青霉素类(哌拉西林他唑巴坦或头孢哌酮舒巴坦钠)联用喹诺酮类有10例,青霉素类联合多西环素3例。有2例病人初始选择青霉素类加喹诺酮类药物治疗无效,改用多西环素或联用多西环素后症状缓解。28例病人均预后良好,无死亡病例。结论鹦鹉热衣原体肺炎病人的职业史、临床表现、实验室检查结果及肺部CT具有一定的特点;临床对可疑病例应尽早行mNGS检测,快速过渡到精准治疗,能明显改善预后。
文摘Objective;To determine the presence of zoonotic tick-borne bacteria in feral pigeons(Columba lixia domestica) from urban areas.Methods:Spleen samples from 84 feral pigeons,found dead with traumatic injuries in urban areas,were examined by PCR to detect DNA of Anaplasma phagocytophilum,Bartonella spp.,Borrelia burgdorferi sensu lato.Coxiella burnetii.Rickettsia spp.,and Chlamydnphila spp.Results:Twenty(23.8%) pigeons were infected by tick-borne agents,in particular 2(2.38%) animals resulted positive for Bartonella spp.,5(5.95%) for Coxiella burnetii.5(5.95%) for Rickettsia spp.,13(15.47%) for Borrelia burgdorferi sensu lato.All birds scored negative for anaplasma phagocytophilum.Moreover,17(20.23%) pigeons were positive for Chlamydophila spp.and among them 10(11.9%) for Chlamydophila psittaci,Mixed infections by two or three agents were detected in 8(9.52%) animals.Conclusions:Feral pigeons living in urban and periurban areas are a hazard for the human health as source of several pathogens.The obtained results confirm pigeons as reservoirs of chlamydial agents and suggest that they may be involved in the epidemiology of zoonotic tick-borne infections too.
