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您的检索式：作者名="Catherine A.Gordon"
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| 1 | Real-time PCR diagnosis of Schistosoma japonicum in low transmission areas of China显示文摘Background:Schistosomiasis in the People’s Republic of China(PRC)can be traced back to antiquity.In the past 60 years,the Chinese government has made great efforts to control this persistent disease with elimination slated by 2020 through the implementation of a comprehensive control strategy.This strategy aims to reduce the role of bovines and humans as sources of infection as a pre-requisite for elimination through transmission interruption.The goal of elimination will be achievable only by the implementation of a sustainable surveillance and control system,with sensitive diagnosis a key feature so that the true disease burden is not underestimated.Currently used diagnostics lack the necessary sensitivity to accurately determine the prevalence of Schistosoma japonicum infection in areas with low infection intensities.It is of critical importance to find and treat people and to identify animals with low-level infections if the National Control Programme for China is to achieve schistosomiasis elimination.Methods:We evaluated a real-time polymerase chain reaction(qPCR)assay using 633 human stool samples collected from five villages in Hunan,Anhui,Hubei,and Jiangxi provinces,and 182 bovine(70 cattle and 112 buffalo)stool samples obtained from four villages in Hunan,Anhui,and Jiangxi provinces in the PRC.All stool samples were subjected to the miracidium hatching test(MHT,a diagnostic procedure used in the National Schistosomiasis Control Programme)and the qPCR assay.Samples positive by MHT were subjected to either the Kato-Katz technique for humans,or the formalin-ethyl acetate sedimentation-digestion(FEA-SD)procedure for bovines,to determine infection intensities.Results:The qPCR assay exhibited a high level of sensitivity in the detection of S.japonicum infections.With both the human and bovine samples,a significantly higher prevalence was determined using the qPCR assay(11.06%humans,24.73%bovines)than with the MHT(0.93%humans,7.69%bovines).The animal contamination index(calculated using data obtained with the qPCR technique)for all positive bovines was 27618000 eggs per day,indicating a considerable amount of environmental egg contamination that would be underestimated using less sensitive diagnostic procedures.Conclusions:The qPCR assay we have evaluated will be applicable as a future field diagnostic and surveillance tool in low-transmission zones where schistosomiasis elimination is targeted and for monitoring post-intervention areas to verify that elimination has been maintained. | Pei He Catherine A.Gordon Gail M.Williams Yuesheng Li Yuanyuan Wang Junjian Hu Darren J.Gray Allen G.Ross Donald Harn Donald P.McManus | 2018 | Infectious Diseases of Poverty2018，7，1： | 7 |
| 2 | Optimisation of the DNA dipstick as a rapid extraction method for Schistosoma japonicum in infected mice samples and spiked human clinical samples显示文摘BackgroundSchistosomiasis remains a public health issue and the need for accurate and affordable diagnostics is crucial in the elimination of the disease. While molecular diagnostics are highly effective, they are expensive, with the main costs been associated with DNA extraction. The DNA dipstick is a rapid, affordable and simple purification method that allows DNA to be extracted from diagnostic samples within 30 s. We aimed to optimise the DNA dipstick method for samples from mice and egg-spiked human samples.MethodsUrine, blood and faeces were collected from mice exposed to Schistosoma japonicum infection at weekly intervals from Day 0 to Day 42. Urine and faecal samples were also collected from volunteer, uninfected humans and spiked with S. japonicum eggs. All samples were subject to several optimisation procedures and DNA extracted with the DNA dipstick. Amplification of the target DNA was carried out using LAMP and visualised using agarose gel electrophoresis and flocculation.ResultsThe DNA dipstick successfully identified S. japonicum from infected mice and human clinical samples spiked with cracked eggs or genomic DNA from S. japonicum. Amplification was observed from week 4 post infection in infected mice. For human samples, amplification was observed in sieved faecal samples, filtered urine samples heated at 95 ℃ for 30 min, and sera samples heated at 95℃ for 30 min.ConclusionsThe DNA dipstick combined with LAMP has huge potential in providing cost-effective, simple and accurate detection of schistosomiasis infection in endemic regions. This will allow for rapid treatment, tracking outbreaks—such as occur after typhoons, leading to better health outcomes and contributing to control and eventual elimination of schistosomiasis. | Oyime P.Aula Donald P.McManus Malcolm K.Jones Hong You Pengfei Cai Catherine A.Gordon | 2023 | Infectious Diseases of Poverty2023，12，4： | 1 |
| 3 | The control of soil-transmitted helminthiases in the Philippines: the story continues显示文摘Background:Soil-transmitted helminth(STH)infections have long been an important public health concern in the Philippines.In this review,we describe the current status of STH infections there and highlight the control efforts undertaken to reduce STH burden.Main text:A nationwide STH mass drug administration(MDA)programme was started in 2006 but the overall STH prevalence remains stubbornly high across the Philippines,rangi ng from 24.9%to 97.4%. | Mary Lorraine S.Mationg Veronica L.Tallo Gail M.Williams Catherine A.Gordon Archie C.A.Clements Donald P.McManus Darren J.Gray | 2021 | Infectious Diseases of Poverty2021，10，3： | 0 |
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