| Spezies | Risiko- gruppe | Bemer- kungen | Status |
| Iamia | |||
| Iamia majanohamensis | 1 | ||
| Ichthyenterobacterium | |||
| Ichthyenterobacterium magnum | 1 | neu | |
| Ichthyobacterium | |||
| Ichthyobacterium seriolicida | 1 | t2 | neu |
| Ideonella | |||
| Ideonella azotifigens | 1 | ||
| Ideonella dechloratans | 1 | ||
| Ideonella paludis | 1 | neu | |
| Ideonella sakaiensis | 1 | neu | |
| Idiomarina | |||
| Idiomarina abyssalis | 1 | ||
| Idiomarina aestuarii (Pseudidiomarina aestuarii) | 1 | ||
| Idiomarina aquatica | 1 | neu | |
| Idiomarina aquimaris | 1 | ||
| Idiomarina atlantica | 1 | neu | |
| Idiomarina baltica | 1 | ||
| Idiomarina donghaiensis (Pseudidiomarina donghaiensis) | 1 | ||
| Idiomarina fontislapidosi | 1 | ||
| Idiomarina halophila | 1 | neu | |
| Idiomarina homiensis (Pseudidiomarina homiensis) | 1 | ||
| Idiomarina indica | 1 | ||
| Idiomarina insulisalsae | 1 | ||
| Idiomarina loihiensis | 1 | ||
| Idiomarina marina (Pseudidiomarina marina) | 1 | ||
| Idiomarina maris ? Aliidiomarina maris | |||
| Idiomarina maritima (Pseudidiomarina maritima) | 1 | ||
| Idiomarina piscisalsi | 1 | ||
| Idiomarina planktonica | 1 | neu | |
| Idiomarina ramblicola | 1 | ||
| Idiomarina salinarum (Pseudidiomarina salinarum) | 1 | ||
| Idiomarina sediminum (Pseudidiomarina sediminum) | 1 | ||
| Idiomarina seosinensis | 1 | ||
| Idiomarina tainanensis (Pseudidiomarina tainanensis) | 1 | ||
| Idiomarina taiwanensis (Pseudidiomarina taiwanensis) | 1 | ||
| Idiomarina tyrosinivorans | 1 | neu | |
| Idiomarina woesei | 1 | neu | |
| Idiomarina xiamenensis | 1 | ||
| Idiomarina zobellii | 1 | ||
| Ignatzschineria | |||
| Ignatzschineria indica | 1 | ||
| Ignatzschineria larvae (Schineria larvae) | 1 | + | |
| Ignatzschineria ureiclastica | 1 | ||
| Ignavibacterium | |||
| Ignavibacterium album | 1 | ||
| Ignavigranum | |||
| Ignavigranum ruoffiae | 2 | ||
| Ignicoccus | |||
| Ignicoccus hospitalis | 1 | ||
| Ignicoccus islandicus | 1 | ||
| Ignicoccus pacificus | 1 | ||
| Ignisphaera | |||
| Ignisphaera aggregans | 1 | ||
| Ileibacterium | |||
| Ileibacterium valens | 1 | neu | |
| Ilumatobacter | |||
| Ilumatobacter coccineum | 1 | ||
| Ilumatobacter fluminis | 1 | ||
| Ilumatobacter nonamiense | 1 | ||
| Ilyobacter | |||
| Ilyobacter delafieldii | 1 | ||
| Ilyobacter insuetus | 1 | ||
| Ilyobacter polytropus | 1 | ||
| Ilyobacter tartaricus | 1 | ||
| Imhoffiella | |||
| Imhoffiella bheemlica (Thiorhodococcus bheemlicus) | 1 | Umb. | |
| Imhoffiella purpurea | 1 | neu | |
| Immundisolibacter | |||
| Immundisolibacter cernigliae | 1 | neu | |
| Imperialibacter | |||
| Imperialibacter roseus | 1 | ||
| Imtechella | |||
| Imtechella halotolerans | 1 | ||
| Indibacter | |||
| Indibacter alkaliphilus | 1 | ||
| Inhella | |||
| Inhella fonticola | 1 | ||
| Inhella inkyongensis | 1 | ||
| Inmirania | |||
| Inmirania thermothiophila | 1 | neu | |
| Inquilinus | |||
| Inquilinus ginsengisoli | 1 | ||
| Inquilinus limosus | 1 | + | |
| Insolitispirillum | |||
| Insolitispirillum peregrinum subsp. integrum (Aquaspirillum peregrinum subsp. integrum) | 1 | ||
| Insolitispirillum peregrinum subsp. peregrinum (Aquaspirillum peregrinum subsp. peregrinum) | 1 | ||
| Intestinibacter | |||
| Intestinibacter bartlettii (Clostridium bartlettii) | 1 | ||
| Intestinimonas | |||
| Intestinimonas butyriciproducens | 1 | ||
| Intrasporangium | |||
| Intrasporangium calvum | 1 | ||
| Intrasporangium chromatireducens | 1 | ||
| Intrasporangium mesophilum | 1 | ||
| Intrasporangium oryzae (Humihabitans oryzae) | 1 | ||
| Iodidimonas | |||
| Iodidimonas muriae | 1 | neu | |
| Iodobacter | |||
| Iodobacter arcticus | 1 | ||
| Iodobacter fluviatilis (Chromobacterium fluviatile) | 1 | ||
| Iodobacter limnosediminis | 1 | ||
| Irregularibacter | |||
| Irregularibacter muris | 1 | neu | |
| Isobaculum | |||
| Isobaculum melis | 1 | neu | |
| Isochromatium | |||
| Isochromatium buderi (Chromatium buderi) | 1 | ||
| Isoptericola | |||
| Isoptericola chiayiensis | 1 | ||
| Isoptericola cucumis | 1 | neu | |
| Isoptericola dokdonensis | 1 | ||
| Isoptericola halotolerans | 1 | ||
| Isoptericola hypogeus | 1 | ||
| Isoptericola jiangsuensis | 1 | ||
| Isoptericola nanjingensis | 1 | ||
| Isoptericola variabilis (Cellulosimicrobium variabile) | 1 | ||
| Isosphaera | |||
| Isosphaera pallida | 1 | ||
| Izhakiella | |||
| Izhakiella australiensis | 1 | neu | |
| Izhakiella capsodis | 1 | neu |