Saccharomonospora
azurea - viridis

Saccharopolyspora
erythraea - gregorii - hirsuta - hordei - rectivirgula

Saccharothrix
australiensis - mutabilis - texasensis

Salegentibacter
salegens

Salinicoccus
hispanicus - roseus

Salinivibrio
costicola

Salmonella
choleraesuis - hadar - infantis - typhimurium

Sanguibacter
inulinus - keddieii - suarezii

Saprospira
grandis

Sarcina
sp

Serratia
entomophilia - grimesii - liquefaciens - marcescens - plymuthica - rubidaea

Shewanella
algae - baltica - frigidimarina - hanedai - japonica - pealeana - putrefaciens - woodyi

Sinorhizobium
arboris - fredii - kostiense - meliloti - saheli - terangae - xinjiangense

Sodalis
glossinidius

Soehngenia
thermomethanica

Sphaerobacter
thermophilus

Sphaerotilus
natans

Sphingobacterium
faecium - multivorum

Sphingobium
chlorophenolicum

Sphingomonas
adhaesiva - echinoides - mali - natatoria - paucimobilis - pituitosa - pruni - sanguinus - trueperi

Sphingopyxis
macrogoltabida - terrae

Spirillospora
albida

Spirillum
pleomorphum - sp.

Spirosoma
linguale

Sporichthya
polymorpha

Sporocytophaga
myxococcoides

Sporolactobacillus
cellulosolvens - inulinus - sp.

Sporomusa
acidovorans

Sporosarcina
globispora - pasteurii - ureae

Staphylococcus
aureus - capitis - carnosus - chromogenes - cohnii - condimenti - delphini - epidermidis - hominis - lutrae - piscifermentans - saccharolyticus - saprophyticus - sp. - warneri - xylosus

Stappia
aggregata

Starkeya
novella

Stenotrophomonas
maltophilia

Streptoacidophilus
carbonis - neutrinimicus

Streptoalloteichus
hindustanus

Streptobacillus
sp

Streptococcus
acidominimus - agalactiae - alactolyticus - anginosus - bovis - constellatus - criceti - dysgalactiae - equi - equinus - equisimilis - ferus - gallolyticus - infantarius - iniae - intermedius - mitis - mutans - oralis - parauberis - phocae - pleomorphus - pluranimalium - pneumoniae - porcinus - pyogenes - ratti - salivarius - sanguinis - sobrinus - sp. - suis - thermophilus - uberis - waius

Streptomyces
achromogenes - adephospholyticus - albidoflavus - albireticuli - albofaciens - alboflavus - albogriseolus - alboniger - albovinaceus - albus - aminophilus - antibioticus - anulatus - argenteolus - armeniacus - arsitiensis - asiaticus - atroolivaceus - aurantiogriseus - aureofaciens - aureus - avellaneus - avermitilis - avidinii - badius - bellus - blastmyceticus - bluensis - cacaoi - caelestis - caesius - calvus - canarius - candidus - cangkringensis - canus - capillispiralis - cattleya - cavourensis - cellostaticus - cellulosae - champavatii - chattanoogensis - chrestomyceticus - chryseus - cinereoruber - cinereus - cinnamonensis - cinnamoneus - citreofluorescens - clavuligerus - coelescens - coelicolor - coeruleofuscus - coeruleorubidus - coerulescens - collinus - coralus - corchorusii - coriofaciens - costaricanus - cremeus - crystallinus - cyaneofuscatus - cyanoalbus - cyanogriseus - diastaticus - diastatochromogenes - distallicus - echinatus - echinoruber - endus - exfoliatus - felleus - filamentosus - fimbriatus - finlayi - flaveus - flaviscleroticus - floridae - fluorescens - fradiae - fragilis - fragmentans - fulvissimus - fulvoviridis - fumigatiscleroticus - fungicidicus - furlongus - galbus - gancidicus - gedanensis - gelaticus - glaucescens - glaucus - globisporus - globosus - goshikiensis - griseobrunneus - griseocarneus - griseoflavus - griseofuscus - griseoincarnatus - griseolus - griseomycini - griseoplanus - griseorubens - griseoviridis - griseus - halstedii - hawaiiensis - henetus - herbaricolor - hiroshimensis - humiferus - hygroscopicus - indiaensis - indigoferus - indonesiensis - insignis - jamaicensis - javensis - kanamyceticus - karnatakensis - kasugaensis - katrae - kentuckensis - khandalensis - kurssanovii - kuwaitiensis - lavendofoliae - lavendulae - lavendulocolor - libani - limosus - lincolnensis - lipmanii - lisandri - lividans - lomondensis - longispororuber - longisporus - lucensis - lusitanus - luteoverticillatus - lydicus - macrosporeus - macrosporus - matensis - mediocidicus - mediolani - megasporus - melanogenes - melanosporofaciens - michiganensis - minutiscleroticus - misakiensis - misionensis - mobaraensis - murinus - natalensis - netropsis - niger - nigrescens - nigrifaciens - nitrosporeus - niveus - nodosus - nogalater - noursei - olivaceoviridis - olivaceus - olivoverticillatus - pactum - parvulus - parvus - paulus - peucetius - phaeochromogenes - phaeoviridis - pilosus - platensis - plicatus - pluricolorescens - polychromogenes - prasinopilosus - prunicolor - pseudoechinosporeus - pseudogriseolus - purpeochromogenes - purpeofuscus - purpurascens - purpureus - purpurogeneiscleroticus - resistomycificus - rhizosphaericus - rimosus - rishiriensis - roseiscleroticus - roseochromogenes - roseolus - roseoluteus - roseosporus - roseoverticillatus - roseoviridis - ruber - rubroverrucosus - rufochromogenes - saprophyticus - septatus - setae - sp. - sparsogenes - spectabilis - spheroides - spinocoumarensis - spinoverrucosus - spiroverticillatus - sviceus - tendae - tenebrarius - termitum - tetanusemus - thermocarboxydovorans - thermocarboxydus - thermolineatus - thermotolerans - thermoviolaceus - thermovulgaris - toxytricini - toyocaensis - tsusimaensis - vellosus - venezuelae - vinaceusdrappus - violaceoruber - violaceus - violascens - virginiae - viridans - viridifaciens - viridochromogenes - viridosporus - viridoverrucosus - willmorei - xantholiticus - yerevanensis - yogyakartensis - zaomyceticus

Streptosporangium
carneum - claviforme - roseum

Streptoverticillium
reticulum - sp. - waksmanii

Subtercola
boreus - frigoramans

Sulfitobacter
sp

Sulfolobus
acidocaldarius