{"id":611,"date":"2026-05-27T14:19:00","date_gmt":"2026-05-27T14:19:00","guid":{"rendered":"https:\/\/www.biomnigene.fr\/presence-absence-of-an-organism\/"},"modified":"2026-09-10T12:58:46","modified_gmt":"2026-09-10T12:58:46","slug":"presence-absence-of-an-organism","status":"publish","type":"page","link":"https:\/\/www.biomnigene.fr\/en\/presence-absence-of-an-organism\/","title":{"rendered":"Presence\/absence of an organism"},"content":{"rendered":"<div class=\"et_pb_section_0 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_0 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_0 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n\n\n\n\n\n\n\n\n\n\n\n\n<div class=\"et_pb_module et_d4_element dsm_breadcrumbs dsm_breadcrumbs_0\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module_inner\">\n\t\t\t\t\t<nav class=\"dsm_breadcrumbs_wrap\">\n\t\t\t\t<ul class=\"dsm_breadcrumbs\" itemscope itemtype=\"https:\/\/schema.org\/BreadcrumbList\">\t\t\t<li class=\"dsm_breadcrumbs_item dsm_home_item dsm_home_item_custom\" itemprop=\"itemListElement\" itemscope\n\t\t\titemtype=\"https:\/\/schema.org\/ListItem\">\n\t\t\t\t<a href=\"https:\/\/www.biomnigene.fr\/en\/\" itemprop=\"item\" target=\"\">\n\t\t\t\t\t<span class='dsm_home_text_wrapper'>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"et-pb-icon dsm_home_icon\">\ue074<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"dsm_home_text\" itemprop=\"name\">\n\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t<\/a>\n\t\t\t\t<meta itemprop=\"position\" content=\"1\" \/>\n\t\t\t<\/li>\n\n\t\t<li class=\"dsm_breadcrumbs_separator\"> <span class=\"et-pb-icon dsm_separator_icon\">5<\/span><\/li><\/ul>\n\t\t\t<\/nav>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_1 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_1 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_0 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module preset--module--divi-text--default\"><div class=\"et_pb_text_inner\"><h1>Presence\/absence of an organism<\/h1>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_section_1 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_2 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_2 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_1 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h2 style=\"text-align: left;\"><strong>Verify the presence of an organism in a sample<\/strong><\/h2>\n<\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_3 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_2 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p>In certain scientific or technical contexts, it is necessary to determine <strong>whether a particular organism is present or not in a sample.<\/strong><\/p>\n<p>Genetic analysis makes it possible to identify this organism by searching for a <strong>specific DNA sequence<\/strong> unique to it.<\/p>\n<\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_4 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_3 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p>Thanks to molecular biology techniques, it becomes possible to detect a target species even when it is present in very small quantities in a given environment. <\/p>\n<p>This approach is used to analyze environmental, biological, or food samples and verify the presence of a specific organism.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_3 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_5 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_image_0 et_pb_image et_pb_module et_flex_module\"><span class=\"et_pb_image_wrap\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.biomnigene.fr\/wp-content\/uploads\/2026\/05\/img-presence-absence-organisme-1.webp\" title=\"img-presence-absence-organisme-1\" width=\"1920\" height=\"640\" srcset=\"https:\/\/www.biomnigene.fr\/wp-content\/uploads\/2026\/05\/img-presence-absence-organisme-1.webp 1920w, https:\/\/www.biomnigene.fr\/wp-content\/uploads\/2026\/05\/img-presence-absence-organisme-1-1280x427.webp 1280w, https:\/\/www.biomnigene.fr\/wp-content\/uploads\/2026\/05\/img-presence-absence-organisme-1-980x327.webp 980w, https:\/\/www.biomnigene.fr\/wp-content\/uploads\/2026\/05\/img-presence-absence-organisme-1-480x160.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1920px, 100vw\" class=\"wp-image-344\" \/><\/span><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_4 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_6 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_4 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h2 style=\"text-align: left;\"><strong>When should you test for the presence of an organism?<\/strong><\/h2>\n<\/div><\/div>\n\n<div class=\"et_pb_text_5 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p>Targeted detection of an organism can be useful in different situations:<\/p>\n<ul>\n<li>verify the presence of a <strong>particular species in an environment,<\/strong><\/li>\n<li>detect a <strong>specific microorganism in a sample,<\/strong><\/li>\n<li>check for the presence of a <strong>pathogenic or undesirable organism,<\/strong><\/li>\n<li>confirm the existence of a species in the environment being studied.<\/li>\n<\/ul>\n<p>These analyses provide a clear answer: the organism sought is <strong>present or absent in the sample.<\/strong><\/p>\n<\/div><\/div>\n<\/div>\n\n<div class=\"et_pb_column_7 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_6 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h2 style=\"text-align: left;\"><strong>An analysis tailored to each environment studied<\/strong><\/h2>\n<\/div><\/div>\n\n<div class=\"et_pb_text_7 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p>The choice of analysis strategy depends in particular on:<\/p>\n<ul>\n<li>the type of organism sought,<\/li>\n<li>the nature of the sample (water, soil, biological sample, etc.),<\/li>\n<li>the sensitivity required for detection.<\/li>\n<\/ul>\n<p>Depending on these parameters, different molecular biology techniques can be used to detect the presence of an organism accurately.<\/p>\n<\/div><\/div>\n\n<div class=\"et_pb_module et_pb_button_module_wrapper et_pb_button_0_wrapper preset--module--divi-button--ssmr0y6bs7_wrapper\"><a class=\"et_pb_button_0 et_pb_button et_pb_bg_layout_dark et_pb_module et_block_module preset--module--divi-button--ssmr0y6bs7\" href=\"https:\/\/www.biomnigene.fr\/contact\/\" data-icon=\"$\">Contact us<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_section_2 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_5 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_8 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_text_8 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h2 style=\"text-align: center;\"><strong>How can a specific organism be detected?<\/strong><\/h2>\n<\/div><\/div>\n\n<div class=\"et_pb_text_9 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p style=\"text-align: center;\">Detection generally relies on identifying a <strong>genetic sequence characteristic of the organism being studied.<\/strong><\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_row_6 et_pb_row et_flex_row preset--module--divi-row--default\">\n<div class=\"et_pb_column_9 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_group_0 et_pb_group et-last-child et_pb_module et_flex_group et_pb_css_mix_blend_mode_passthrough\">\n<div class=\"et_pb_text_10 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3 style=\"text-align: left;\"><strong>Targeted amplification by PCR<\/strong><\/h3>\n<\/div><\/div>\n\n<div class=\"et_pb_text_11 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p><strong>PCR (Polymerase Chain Reaction)<\/strong> is used to amplify a specific DNA region unique to the organism sought.<br \/>If this sequence is detected after amplification, this confirms the presence of the organism in the sample.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_column_10 et_pb_column et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_group_1 et_pb_group et-last-child et_pb_module et_flex_group et_pb_css_mix_blend_mode_passthrough\">\n<div class=\"et_pb_text_12 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><h3 style=\"text-align: left;\"><strong>Sensitive detection by quantitative PCR<\/strong><\/h3>\n<\/div><\/div>\n\n<div class=\"et_pb_text_13 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><div class=\"et_pb_text_inner\"><p><strong>Quantitative PCR (qPCR)<\/strong> not only detects a target genetic sequence, but also identifies organisms present in very small quantities in a sample. <\/p>\n<p>This approach offers high sensitivity and provides reliable results even in complex environments.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_column_11 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_8_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_group_2 et_pb_group et-last-child et_pb_module et_flex_group et_pb_css_mix_blend_mode_passthrough\">\n<div class=\"et_pb_text_14 et_pb_text et_pb_bg_layout_light et_pb_module et_flex_module\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"et_pb_section_3 et_pb_section et_section_regular et_flex_section\"><div class=\"et_pb_row_7 et_pb_row et_flex_row preset--module--divi-row--default\"><div class=\"et_pb_column_12 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet 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contacter<\/a><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-611","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Detection of the presence or absence of an organism | Biomnig\u00e8ne<\/title>\n<meta name=\"description\" content=\"Verify the presence or absence of an organism in a sample with Biomnig\u00e8ne. 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