Development of duplex TaqMan-based real-time PCR assay for the simultaneous detection of Perkinsus olseni and P. chesapeaki in host Manila clam tissue samples
[Display omitted] •Duplex qPCR is a suitable method to detect simultaneously P. olseni and P. chesapeaki within Manila clam.•PCR inhibitor compounds are present in Manila clam gDNA depending on the organ-type.•For each organ, a threshold concentration of host gDNA is needed for good use of PCR and q...
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creator | Itoïz, Sarah Perennou, Morgan Mouronvalle, Clara Derelle, Evelyne Le Goïc, Nelly Bidault, Adeline de Montaudouin, Xavier Arzul, Isabelle Soudant, Philippe Chambouvet, Aurélie |
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•Duplex qPCR is a suitable method to detect simultaneously P. olseni and P. chesapeaki within Manila clam.•PCR inhibitor compounds are present in Manila clam gDNA depending on the organ-type.•For each organ, a threshold concentration of host gDNA is needed for good use of PCR and qPCR.•Duplex qPCR results are correlated with those obtained by standard thioglycolate method.•In Arcachon bay, the prevalence of co-infection is low (6 %) and the intensity of infection is dominated by P. olseni.•Single-infection is only detected for P. olseni parasite.
The aetiological agent Perkinsus olseni is globally recognised as a major threat for shellfish production considering its wide geographical distribution across Asia, Europe, Australia and South America. Another species, Perkinsus chesapeaki, which has never been known to be associated with significant mortality events, was recently detected along French coasts infecting clam populations sporadically in association with P. olseni. Identifying potential cryptic infections affecting Ruditapes philippinarum is essential to develop appropriate host resource management strategies. Here, we developed a molecular method based on duplex real-time quantitative PCR for the simultaneous detection of these two parasites, P. olseni and P. chesapeaki, in the different clam tissues: gills, digestive gland, foot, mantle, adductor muscle and the rest of the soft body. We firstly checked the presence of possible PCR inhibitors in host tissue samples. The qPCR reactions were inhibited depending on the nature of the host organ. The mantle and the rest of the soft body have a high inhibitory effect from threshold of host gDNA concentration of 2 ng.µL−1, the adductor muscle and the foot have an intermediate inhibition of 5 ng.µL−1, and the gills and digestive gland do not show any inhibition of the qPCR reaction even at the highest host gDNA concentration of 20 ng.µL−1. Then, using the gills as a template, the suitability of the molecular technique was checked in comparison with the Ray’s Fluid Thioglycolate Medium methodology recommended by the World Organisation for Animal Health. The duplex qPCR method brought new insights and unveiled cryptic infections as the co-occurrence of P. olseni and P. chesapeaki from in situ tissue samples in contrast to the RFTM diagnosis. The development of this duplex qPCR method is a fundamental work to monitor in situ co-infections that will lead to optimised resource management and c |
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•Duplex qPCR is a suitable method to detect simultaneously P. olseni and P. chesapeaki within Manila clam.•PCR inhibitor compounds are present in Manila clam gDNA depending on the organ-type.•For each organ, a threshold concentration of host gDNA is needed for good use of PCR and qPCR.•Duplex qPCR results are correlated with those obtained by standard thioglycolate method.•In Arcachon bay, the prevalence of co-infection is low (6 %) and the intensity of infection is dominated by P. olseni.•Single-infection is only detected for P. olseni parasite.
The aetiological agent Perkinsus olseni is globally recognised as a major threat for shellfish production considering its wide geographical distribution across Asia, Europe, Australia and South America. Another species, Perkinsus chesapeaki, which has never been known to be associated with significant mortality events, was recently detected along French coasts infecting clam populations sporadically in association with P. olseni. Identifying potential cryptic infections affecting Ruditapes philippinarum is essential to develop appropriate host resource management strategies. Here, we developed a molecular method based on duplex real-time quantitative PCR for the simultaneous detection of these two parasites, P. olseni and P. chesapeaki, in the different clam tissues: gills, digestive gland, foot, mantle, adductor muscle and the rest of the soft body. We firstly checked the presence of possible PCR inhibitors in host tissue samples. The qPCR reactions were inhibited depending on the nature of the host organ. The mantle and the rest of the soft body have a high inhibitory effect from threshold of host gDNA concentration of 2 ng.µL−1, the adductor muscle and the foot have an intermediate inhibition of 5 ng.µL−1, and the gills and digestive gland do not show any inhibition of the qPCR reaction even at the highest host gDNA concentration of 20 ng.µL−1. Then, using the gills as a template, the suitability of the molecular technique was checked in comparison with the Ray’s Fluid Thioglycolate Medium methodology recommended by the World Organisation for Animal Health. The duplex qPCR method brought new insights and unveiled cryptic infections as the co-occurrence of P. olseni and P. chesapeaki from in situ tissue samples in contrast to the RFTM diagnosis. The development of this duplex qPCR method is a fundamental work to monitor in situ co-infections that will lead to optimised resource management and conservation strategies to deal with emerging diseases.</description><identifier>ISSN: 0022-2011</identifier><identifier>EISSN: 1096-0805</identifier><identifier>DOI: 10.1016/j.jip.2021.107603</identifier><identifier>PMID: 33971219</identifier><language>eng</language><publisher>SAN DIEGO: Elsevier Inc</publisher><subject>Alveolata ; Co-infection ; Environmental Sciences ; Inhibitory effect ; Life Sciences ; Life Sciences & Biomedicine ; Molluscs ; qPCR ; Ruditapes philippinarum ; Science & Technology ; Zoology</subject><ispartof>Journal of invertebrate pathology, 2021-09, Vol.184, p.107603-107603, Article 107603</ispartof><rights>2021</rights><rights>Copyright © 2021. Published by Elsevier Inc.</rights><rights>Attribution - NonCommercial</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>2</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000696985900006</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c430t-798594ec84e7ddd091a44886a70d1cdbcafff95ec9a17f27a54aef4191eb82533</citedby><cites>FETCH-LOGICAL-c430t-798594ec84e7ddd091a44886a70d1cdbcafff95ec9a17f27a54aef4191eb82533</cites><orcidid>0000-0001-5436-5927 ; 0000-0003-3932-0098 ; 0000-0002-1499-4240 ; 0000-0003-3090-5612</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jip.2021.107603$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,315,782,786,887,3552,27931,27932,39265,46002</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33971219$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-03331875$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Itoïz, Sarah</creatorcontrib><creatorcontrib>Perennou, Morgan</creatorcontrib><creatorcontrib>Mouronvalle, Clara</creatorcontrib><creatorcontrib>Derelle, Evelyne</creatorcontrib><creatorcontrib>Le Goïc, Nelly</creatorcontrib><creatorcontrib>Bidault, Adeline</creatorcontrib><creatorcontrib>de Montaudouin, Xavier</creatorcontrib><creatorcontrib>Arzul, Isabelle</creatorcontrib><creatorcontrib>Soudant, Philippe</creatorcontrib><creatorcontrib>Chambouvet, Aurélie</creatorcontrib><title>Development of duplex TaqMan-based real-time PCR assay for the simultaneous detection of Perkinsus olseni and P. chesapeaki in host Manila clam tissue samples</title><title>Journal of invertebrate pathology</title><addtitle>J INVERTEBR PATHOL</addtitle><addtitle>J Invertebr Pathol</addtitle><description>[Display omitted]
•Duplex qPCR is a suitable method to detect simultaneously P. olseni and P. chesapeaki within Manila clam.•PCR inhibitor compounds are present in Manila clam gDNA depending on the organ-type.•For each organ, a threshold concentration of host gDNA is needed for good use of PCR and qPCR.•Duplex qPCR results are correlated with those obtained by standard thioglycolate method.•In Arcachon bay, the prevalence of co-infection is low (6 %) and the intensity of infection is dominated by P. olseni.•Single-infection is only detected for P. olseni parasite.
The aetiological agent Perkinsus olseni is globally recognised as a major threat for shellfish production considering its wide geographical distribution across Asia, Europe, Australia and South America. Another species, Perkinsus chesapeaki, which has never been known to be associated with significant mortality events, was recently detected along French coasts infecting clam populations sporadically in association with P. olseni. Identifying potential cryptic infections affecting Ruditapes philippinarum is essential to develop appropriate host resource management strategies. Here, we developed a molecular method based on duplex real-time quantitative PCR for the simultaneous detection of these two parasites, P. olseni and P. chesapeaki, in the different clam tissues: gills, digestive gland, foot, mantle, adductor muscle and the rest of the soft body. We firstly checked the presence of possible PCR inhibitors in host tissue samples. The qPCR reactions were inhibited depending on the nature of the host organ. The mantle and the rest of the soft body have a high inhibitory effect from threshold of host gDNA concentration of 2 ng.µL−1, the adductor muscle and the foot have an intermediate inhibition of 5 ng.µL−1, and the gills and digestive gland do not show any inhibition of the qPCR reaction even at the highest host gDNA concentration of 20 ng.µL−1. Then, using the gills as a template, the suitability of the molecular technique was checked in comparison with the Ray’s Fluid Thioglycolate Medium methodology recommended by the World Organisation for Animal Health. The duplex qPCR method brought new insights and unveiled cryptic infections as the co-occurrence of P. olseni and P. chesapeaki from in situ tissue samples in contrast to the RFTM diagnosis. The development of this duplex qPCR method is a fundamental work to monitor in situ co-infections that will lead to optimised resource management and conservation strategies to deal with emerging diseases.</description><subject>Alveolata</subject><subject>Co-infection</subject><subject>Environmental Sciences</subject><subject>Inhibitory effect</subject><subject>Life Sciences</subject><subject>Life Sciences & Biomedicine</subject><subject>Molluscs</subject><subject>qPCR</subject><subject>Ruditapes philippinarum</subject><subject>Science & Technology</subject><subject>Zoology</subject><issn>0022-2011</issn><issn>1096-0805</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>HGBXW</sourceid><recordid>eNqNkd2O0zAQhSMEYsvCA3CDfAlCKWPn1-JqVX4WaREVWq6tqT1R3U3ibOwU9mV4Vhyl9BJx5fHoO2fsOUnyksOaAy_fHdYHO6wFCB7vVQnZo2TFQZYp1FA8TlYAQqQCOL9Innl_gFgVpXyaXGSZrLjgcpX8_kBHat3QUR-Ya5iZhpZ-sVu8_4p9ukNPho2EbRpsR2y7-c7Qe3xgjRtZ2BPztpvagD25yTNDgXSwrp-dtjTe2d7Htms99ZZhb9h2zfSePA6Ed5bZnu2dDyyOsi0y3WLHgvV-ir7YxYf458mTBqP8xem8TH58-ni7uU5vvn3-srm6SXWeQUgrWRcyJ13nVBljQHLM87ousQLDtdlpbJpGFqQl8qoRFRY5UpNzyWlXiyLLLpM3i-8eWzWMtsPxQTm06vrqRs09yLKM11Vx5JF9vbDD6O4n8kF11mtq22ULShSiKEshII8oX1A9Ou9Has7eHNQcoTqoGKGaI1RLhFHz6mQ_7ToyZ8XfzCJQL8BP2rnGa0u9pjMGAKUs533AXG5swDmRjZv6EKVv_18a6fcLTXHzR0ujOimMHWPOyjj7j3_8AQeazmE</recordid><startdate>20210901</startdate><enddate>20210901</enddate><creator>Itoïz, Sarah</creator><creator>Perennou, Morgan</creator><creator>Mouronvalle, Clara</creator><creator>Derelle, Evelyne</creator><creator>Le Goïc, Nelly</creator><creator>Bidault, Adeline</creator><creator>de Montaudouin, Xavier</creator><creator>Arzul, Isabelle</creator><creator>Soudant, Philippe</creator><creator>Chambouvet, Aurélie</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>BLEPL</scope><scope>DTL</scope><scope>HGBXW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0001-5436-5927</orcidid><orcidid>https://orcid.org/0000-0003-3932-0098</orcidid><orcidid>https://orcid.org/0000-0002-1499-4240</orcidid><orcidid>https://orcid.org/0000-0003-3090-5612</orcidid></search><sort><creationdate>20210901</creationdate><title>Development of duplex TaqMan-based real-time PCR assay for the simultaneous detection of Perkinsus olseni and P. chesapeaki in host Manila clam tissue samples</title><author>Itoïz, Sarah ; Perennou, Morgan ; Mouronvalle, Clara ; Derelle, Evelyne ; Le Goïc, Nelly ; Bidault, Adeline ; de Montaudouin, Xavier ; Arzul, Isabelle ; Soudant, Philippe ; Chambouvet, Aurélie</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c430t-798594ec84e7ddd091a44886a70d1cdbcafff95ec9a17f27a54aef4191eb82533</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Alveolata</topic><topic>Co-infection</topic><topic>Environmental Sciences</topic><topic>Inhibitory effect</topic><topic>Life Sciences</topic><topic>Life Sciences & Biomedicine</topic><topic>Molluscs</topic><topic>qPCR</topic><topic>Ruditapes philippinarum</topic><topic>Science & Technology</topic><topic>Zoology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Itoïz, Sarah</creatorcontrib><creatorcontrib>Perennou, Morgan</creatorcontrib><creatorcontrib>Mouronvalle, Clara</creatorcontrib><creatorcontrib>Derelle, Evelyne</creatorcontrib><creatorcontrib>Le Goïc, Nelly</creatorcontrib><creatorcontrib>Bidault, Adeline</creatorcontrib><creatorcontrib>de Montaudouin, Xavier</creatorcontrib><creatorcontrib>Arzul, Isabelle</creatorcontrib><creatorcontrib>Soudant, Philippe</creatorcontrib><creatorcontrib>Chambouvet, Aurélie</creatorcontrib><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>Web of Science - Science Citation Index Expanded - 2021</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Journal of invertebrate pathology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Itoïz, Sarah</au><au>Perennou, Morgan</au><au>Mouronvalle, Clara</au><au>Derelle, Evelyne</au><au>Le Goïc, Nelly</au><au>Bidault, Adeline</au><au>de Montaudouin, Xavier</au><au>Arzul, Isabelle</au><au>Soudant, Philippe</au><au>Chambouvet, Aurélie</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Development of duplex TaqMan-based real-time PCR assay for the simultaneous detection of Perkinsus olseni and P. chesapeaki in host Manila clam tissue samples</atitle><jtitle>Journal of invertebrate pathology</jtitle><stitle>J INVERTEBR PATHOL</stitle><addtitle>J Invertebr Pathol</addtitle><date>2021-09-01</date><risdate>2021</risdate><volume>184</volume><spage>107603</spage><epage>107603</epage><pages>107603-107603</pages><artnum>107603</artnum><issn>0022-2011</issn><eissn>1096-0805</eissn><abstract>[Display omitted]
•Duplex qPCR is a suitable method to detect simultaneously P. olseni and P. chesapeaki within Manila clam.•PCR inhibitor compounds are present in Manila clam gDNA depending on the organ-type.•For each organ, a threshold concentration of host gDNA is needed for good use of PCR and qPCR.•Duplex qPCR results are correlated with those obtained by standard thioglycolate method.•In Arcachon bay, the prevalence of co-infection is low (6 %) and the intensity of infection is dominated by P. olseni.•Single-infection is only detected for P. olseni parasite.
The aetiological agent Perkinsus olseni is globally recognised as a major threat for shellfish production considering its wide geographical distribution across Asia, Europe, Australia and South America. Another species, Perkinsus chesapeaki, which has never been known to be associated with significant mortality events, was recently detected along French coasts infecting clam populations sporadically in association with P. olseni. Identifying potential cryptic infections affecting Ruditapes philippinarum is essential to develop appropriate host resource management strategies. Here, we developed a molecular method based on duplex real-time quantitative PCR for the simultaneous detection of these two parasites, P. olseni and P. chesapeaki, in the different clam tissues: gills, digestive gland, foot, mantle, adductor muscle and the rest of the soft body. We firstly checked the presence of possible PCR inhibitors in host tissue samples. The qPCR reactions were inhibited depending on the nature of the host organ. The mantle and the rest of the soft body have a high inhibitory effect from threshold of host gDNA concentration of 2 ng.µL−1, the adductor muscle and the foot have an intermediate inhibition of 5 ng.µL−1, and the gills and digestive gland do not show any inhibition of the qPCR reaction even at the highest host gDNA concentration of 20 ng.µL−1. Then, using the gills as a template, the suitability of the molecular technique was checked in comparison with the Ray’s Fluid Thioglycolate Medium methodology recommended by the World Organisation for Animal Health. The duplex qPCR method brought new insights and unveiled cryptic infections as the co-occurrence of P. olseni and P. chesapeaki from in situ tissue samples in contrast to the RFTM diagnosis. The development of this duplex qPCR method is a fundamental work to monitor in situ co-infections that will lead to optimised resource management and conservation strategies to deal with emerging diseases.</abstract><cop>SAN DIEGO</cop><pub>Elsevier Inc</pub><pmid>33971219</pmid><doi>10.1016/j.jip.2021.107603</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0001-5436-5927</orcidid><orcidid>https://orcid.org/0000-0003-3932-0098</orcidid><orcidid>https://orcid.org/0000-0002-1499-4240</orcidid><orcidid>https://orcid.org/0000-0003-3090-5612</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Alveolata Co-infection Environmental Sciences Inhibitory effect Life Sciences Life Sciences & Biomedicine Molluscs qPCR Ruditapes philippinarum Science & Technology Zoology |
title | Development of duplex TaqMan-based real-time PCR assay for the simultaneous detection of Perkinsus olseni and P. chesapeaki in host Manila clam tissue samples |
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