types:
methanogen
archaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methane; a source of natural gas
halophil,
halophile
archaebacteria requiring a salt-rich environment for growth and survival
thermoacidophile
archaebacteria that thrive in strongly acidic environments at high temperatures
B,
bacillus
aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
cocci,
coccus
any spherical or nearly spherical bacteria
coccobacillus
a bacterial cell intermediate in morphology between a coccus and a bacillus; a very short bacillus
spirilla,
spirillum
any flagellated aerobic bacteria having a spirally twisted rodlike form
clostridia,
clostridium
spindle-shaped bacterial cell especially one swollen at the center by an endospore
clostridium perfringens
anaerobic Gram-positive rod bacterium that produces epsilon toxin; can be used as a bioweapon
blue-green algae,
cyanobacteria
predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton
pseudomonad
bacteria usually producing greenish fluorescent water-soluble pigment; some pathogenic for plants and animals
xanthomonad
bacteria producing yellow non-water-soluble pigments; some pathogenic for plants
thiobacillus
small rod-shaped bacteria living in sewage or soil and oxidizing sulfur
spirillum
spirally twisted elongate rodlike bacteria usually living in stagnant water
listeria
any species of the genus Listeria, a bacteria that can contaminate food and make people very sick
rickettsia
any of a group of very small rod-shaped bacteria that live in biting arthropods (as ticks and mites) and cause disease in vertebrate hosts; they cause typhus and other febrile diseases in human beings
chlamydia
coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract
mycoplasma
any of a group of small parasitic bacteria that lack cell walls and can survive without oxygen; can cause pneumonia and urinary tract infection
actinomycete
any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales
actinomyces
soil-inhabiting saprophytes and disease-producing plant and animal parasites
lactobacillus
a Gram-positive rod-shaped bacterium that produces lactic acid (especially in milk)