Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i>
<i>Enterocytozoon hepatopenaei</i> (EHP) is an obligate, intracellular, spore-forming parasite, which mainly infects the gastrointestinal tract of shrimp. It significantly hinders the growth of shrimp, which causes substantial economic losses in farming. In this study, we established and...
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doaj-aab02c7f5b4c49e7b87c276085abdcfe2020-11-25T01:58:55ZengMDPI AGMicroorganisms2076-26072020-09-0181366136610.3390/microorganisms8091366Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i>Lijun Wang0Qing Lv1Yantong He2Ruocheng Gu3Bingqian Zhou4Jie Chen5Xiaodong Fan6Guoqing Pan7Mengxian Long8Zeyang Zhou9State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaChongqing Key Laboratory of Microsporidia Infection and Control, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, ChinaState Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China<i>Enterocytozoon hepatopenaei</i> (EHP) is an obligate, intracellular, spore-forming parasite, which mainly infects the gastrointestinal tract of shrimp. It significantly hinders the growth of shrimp, which causes substantial economic losses in farming. In this study, we established and optimized a SYBR Green I fluorescent quantitative PCR (qPCR) assay based on the <i>polar tube protein 2</i> (<i>PTP2</i>) gene for the quantitative analysis of EHP-infected shrimp. The result showed that the optimum annealing temperature was 60 °C for the corresponding relation between the amplification quantitative (<i>Cq</i>) and the logarithmic of the initial template quantity (<i>x</i>), conformed to <i>Cq</i> = −3.2751<i>x</i> + 31.269 with a correlation coefficient <i>R</i><sup>2</sup> = 0.993. The amplification efficiency was 102%. This qPCR method also showed high sensitivity, specificity, and repeatability. Moreover, a microscopy method was developed to observe and count EHP spores in hepatopancreas tissue of EHP-infected shrimp using Fluorescent Brightener 28 staining. By comparing the PTP2-qPCR and microscopy method, the microscopic examination was easier to operate whereas PTP2-qPCR was more sensitive for analysis. And we found that there was a correspondence between the results of these two methods. In summary, the PTP2-qPCR method integrated microscopy could serve for EHP detection during the whole period of shrimp farming and satisfy different requirements for detecting EHP in shrimp farming.https://www.mdpi.com/2076-2607/8/9/1366<i>Enterocytozoon hepatopenaei</i>gastrointestinal pathogenfluorescence quantitative PCRpolar tube protein 2fluorescent brightener |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lijun Wang Qing Lv Yantong He Ruocheng Gu Bingqian Zhou Jie Chen Xiaodong Fan Guoqing Pan Mengxian Long Zeyang Zhou |
spellingShingle |
Lijun Wang Qing Lv Yantong He Ruocheng Gu Bingqian Zhou Jie Chen Xiaodong Fan Guoqing Pan Mengxian Long Zeyang Zhou Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i> Microorganisms <i>Enterocytozoon hepatopenaei</i> gastrointestinal pathogen fluorescence quantitative PCR polar tube protein 2 fluorescent brightener |
author_facet |
Lijun Wang Qing Lv Yantong He Ruocheng Gu Bingqian Zhou Jie Chen Xiaodong Fan Guoqing Pan Mengxian Long Zeyang Zhou |
author_sort |
Lijun Wang |
title |
Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i> |
title_short |
Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i> |
title_full |
Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i> |
title_fullStr |
Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i> |
title_full_unstemmed |
Integrated qPCR and Staining Methods for Detection and Quantification of <i>Enterocytozoon hepatopenaei</i> in Shrimp <i>Litopenaeus vannamei</i> |
title_sort |
integrated qpcr and staining methods for detection and quantification of <i>enterocytozoon hepatopenaei</i> in shrimp <i>litopenaeus vannamei</i> |
publisher |
MDPI AG |
series |
Microorganisms |
issn |
2076-2607 |
publishDate |
2020-09-01 |
description |
<i>Enterocytozoon hepatopenaei</i> (EHP) is an obligate, intracellular, spore-forming parasite, which mainly infects the gastrointestinal tract of shrimp. It significantly hinders the growth of shrimp, which causes substantial economic losses in farming. In this study, we established and optimized a SYBR Green I fluorescent quantitative PCR (qPCR) assay based on the <i>polar tube protein 2</i> (<i>PTP2</i>) gene for the quantitative analysis of EHP-infected shrimp. The result showed that the optimum annealing temperature was 60 °C for the corresponding relation between the amplification quantitative (<i>Cq</i>) and the logarithmic of the initial template quantity (<i>x</i>), conformed to <i>Cq</i> = −3.2751<i>x</i> + 31.269 with a correlation coefficient <i>R</i><sup>2</sup> = 0.993. The amplification efficiency was 102%. This qPCR method also showed high sensitivity, specificity, and repeatability. Moreover, a microscopy method was developed to observe and count EHP spores in hepatopancreas tissue of EHP-infected shrimp using Fluorescent Brightener 28 staining. By comparing the PTP2-qPCR and microscopy method, the microscopic examination was easier to operate whereas PTP2-qPCR was more sensitive for analysis. And we found that there was a correspondence between the results of these two methods. In summary, the PTP2-qPCR method integrated microscopy could serve for EHP detection during the whole period of shrimp farming and satisfy different requirements for detecting EHP in shrimp farming. |
topic |
<i>Enterocytozoon hepatopenaei</i> gastrointestinal pathogen fluorescence quantitative PCR polar tube protein 2 fluorescent brightener |
url |
https://www.mdpi.com/2076-2607/8/9/1366 |
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