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Rocchi S, Valot B, Laboissière A, Guitton A, Scherer E, Millon L, Reboux G. Development of a cockroach (Blattella germanica) qPCR for the objective measurement of exposure at home. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 864:160965. [PMID: 36526200 DOI: 10.1016/j.scitotenv.2022.160965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/02/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Cockroach allergens have a greater impact on asthma morbidity than those from dust mites, cats, and dogs. The American cockroach (Periplaneta americana) and the German cockroach (Blattella germanica) are most frequently responsible for sensitization. The worldwide prevalence of allergic sensitization has been estimated at 2 to 26 % and is influenced by unfavorable socioeconomic conditions. Exposure is generally measured by determining antigen levels in dust or through insect trapping. We developed a real-time quantitative PCR (qPCR) method to provide an objective measurement of B. germanica levels in dwellings. The specificity of the qPCR primers and TaqMan® hydrolysis probe was validated in silico with 18S rRNA sequences. No amplification was observed for other species of cockroaches, with the exception of Blattella nipponica, which is not common indoors. From 2018 to 2021, exposure to B. germanica was detected and quantified in 27 of 389 dwellings in Bourgogne-Franche-Comté (mean = 333.8; median = 9.1 and maximum = 5304 copy number equivalents) and in 236 of 3193 ELFE cohort dwellings in mainland France in 2011 (mean = 15.6; median < 1 and maximum = 1275 copy number equivalents). The distribution of dwellings testing positive for cockroaches (7 %) differed among the 12 regions of France: <1 % in two regions, between 1 and 5 % in eight regions, 16.5 % in two regions and 35 % around Paris. Exposure measurements by the EDC sampling and qPCR methods are effective ways to assess the exposure to cockroaches in dwellings. A knowledge of the level of exposure to cockroaches is particularly important for asthmatic patients, particularly those not allergic to other common antigens.
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Affiliation(s)
- Steffi Rocchi
- Department of Parasitology and Mycology, Centre Hospitalier Universitaire, Besançon, France; Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France.
| | - Benoit Valot
- Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France
| | - Audrey Laboissière
- Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France
| | - Audrey Guitton
- Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France
| | - Emeline Scherer
- Department of Parasitology and Mycology, Centre Hospitalier Universitaire, Besançon, France; Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France
| | - Laurence Millon
- Department of Parasitology and Mycology, Centre Hospitalier Universitaire, Besançon, France; Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France
| | - Gabriel Reboux
- Department of Parasitology and Mycology, Centre Hospitalier Universitaire, Besançon, France; Chrono-Environnement Research Team UMR/CNRS-6249, Bourgogne-Franche-Comté University, Besançon, France
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Oliveira AS, Gaspar C, Rolo J, Pereira CC, Palmeira-de-Oliveira R, Teixeira JP, Martinez-de-Oliveira J, Palmeira-de-Oliveira A. Development of a new multiplex PCR to detect prevalent species of house dust mites in house dust. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2022; 32:1500-1512. [PMID: 33685302 DOI: 10.1080/09603123.2021.1893282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Dermatophagoides pteronyssinus and Dermatophagoides farinae are the most common House Dust Mite (HDM) species in home environments worldwide and responsible for HDM allergy. Since the prevalence of HDM-related clinical conditions is linked to exposure to the mite itself, the detection of HDM in the human households gains importance. We aimed to develop a fast and accessible multiplex PCR to detect and distinguish two relevant HDM species in house dust. New primers were designed, and sensitivity analysis was performed. Sequencing of PCR products was also performed to confirm the method's specificity. The limit of detection of the multiplex PCR for both species was as low as 30 pg µL-1. The application of the multiplex PCR to dust samples also resulted in the identification of both species with high sensitivity. The protocol required small amount of template, reagents and a short reaction time thus presenting an alternative to classically used techniques for HDM identification.
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Affiliation(s)
- Ana Sofia Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior Av. Infante D. Henrique, Covilhã, Portugal
- Faculty of Health Sciences,University of Beira Interior, Av. Infante D. Henrique, Covilhã, Portugal
| | - Carlos Gaspar
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior Av. Infante D. Henrique, Covilhã, Portugal
- Faculty of Health Sciences,University of Beira Interior, Av. Infante D. Henrique, Covilhã, Portugal
- Labfit - Health Products Research and Development Lda, UBImedical, Estrada Nacional, Covilhã, Portugal
| | - Joana Rolo
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior Av. Infante D. Henrique, Covilhã, Portugal
| | - Cristiana Costa Pereira
- National Institute of Health,Environmental Health Department, Rua Alexandre Herculano, Porto, Portugal
- EPIUnit, EPIUnit - Instituto de Saúde Pública da Universidade do Porto, Rua das Taipas, Porto, Portugal
| | - Rita Palmeira-de-Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior Av. Infante D. Henrique, Covilhã, Portugal
- Labfit - Health Products Research and Development Lda, UBImedical, Estrada Nacional, Covilhã, Portugal
- fCNC - Center for Neurosciences and Cell Biology, Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Faculty of Medicine (Polo 1), Rua Larga, Coimbra, Portugal
| | - João Paulo Teixeira
- National Institute of Health,Environmental Health Department, Rua Alexandre Herculano, Porto, Portugal
- EPIUnit, EPIUnit - Instituto de Saúde Pública da Universidade do Porto, Rua das Taipas, Porto, Portugal
| | - José Martinez-de-Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior Av. Infante D. Henrique, Covilhã, Portugal
- Faculty of Health Sciences,University of Beira Interior, Av. Infante D. Henrique, Covilhã, Portugal
| | - Ana Palmeira-de-Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior Av. Infante D. Henrique, Covilhã, Portugal
- Faculty of Health Sciences,University of Beira Interior, Av. Infante D. Henrique, Covilhã, Portugal
- Labfit - Health Products Research and Development Lda, UBImedical, Estrada Nacional, Covilhã, Portugal
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Indoor Microbiome: Quantification of Exposure and Association with Geographical Location, Meteorological Factors, and Land Use in France. Microorganisms 2020; 8:microorganisms8030341. [PMID: 32121209 PMCID: PMC7143953 DOI: 10.3390/microorganisms8030341] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 02/25/2020] [Indexed: 12/28/2022] Open
Abstract
The indoor microbial community is a mixture of microorganisms resulting from outdoor ecosystems that seed the built environment. However, the biogeography of the indoor microbial community is still inadequately studied. Dust from more than 3000 dwellings across France was analyzed by qPCR using 17 targets: 10 molds, 3 bacteria groups, and 4 mites. Thus, the first spatial description of the main indoor microbial allergens on the French territory, in relation with biogeographical factors influencing the distribution of microorganisms, was realized in this study. Ten microorganisms out of 17 exhibited increasing abundance profiles across the country: Five microorganisms (Dermatophagoïdes pteronyssinus, Dermatophagoïdes spp., Streptomyces spp., Cladosporium sphaerospermum, Epicoccum nigrum) from northeast to southwest, two (Cryptococcus spp., Alternaria alternata) from northwest to southeast, Mycobacteria from east to west, Aspergillus fumigatus from south to north, and Penicillium chrysogenum from south to northeast. These geographical patterns were partly linked to climate and land cover. Multivariate analysis showed that composition of communities seemed to depend on landscapes, with species related to closed and rather cold and humid landscapes (forests, located in the northeast) and others to more open, hot, and dry landscapes (herbaceous and coastal regions, located in the west). This study highlights the importance of geographical location and outdoor factors that shape communities. In order to study the effect of microorganisms on human health (allergic diseases in particular), it is important to identify biogeographic factors that structure microbial communities on large spatial scales and to quantify the exposure with quantitative tools, such as the multi-qPCR approach.
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