Streptococcus facultatively anaerobic or microaerophilic,catalase negative,gram-positive, Cell arranges in pairs or chains,usually nonmotile, A few species are anaerobic rather than facultative
Streptococcus - facultatively anaerobic or microaerophilic, catalase negative, gram-positive, Cell arranges in pairs or chains, usually nonmotile, A few species are anaerobic rather than facultative
Rod-shaped bacteria Bacilli divide only across their short axis,so there are fewer groupings of bacilli than of cocci. (a) (b) Single bacillus Diplobacilli (c) (d) streptobacilli Coccobacillus
Bacilli divide only across their short axis, so there are fewer groupings of bacilli than of cocci. Rod-shaped bacteria Single bacillus Diplobacilli streptobacilli Coccobacillus
Spore-forming rod shaped bacteria Almost all Spore-forming bacteria are Gram* Bacillus-Aerobic Clostridium-Anaerobic Bacillus subtilis, B.Mycoides Clostridium botulinus B.Pastturii C.butyricum B.megaterium C.aceticum B.Thuringiensis C.tetani B.Anthracis B.Botulinus C.putrificum B.cereus
Clostridium botulinus C. butyricum C. aceticum C. tetani C. putrificum Bacillus subtilis, B. Mycoides B. Pastturii B. megaterium B. Thuringiensis B. Anthracis B. Botulinus B. cereus Spore-forming rod shaped bacteria Almost all Spore-forming bacteria are Gram+ Clostridium – Anaerobic Bacillus – Aerobic
Nonspore forming rod shaped bacteria Most nonspore-forming rod shaped bacteria are Gram- Representatives: Escherchia coli Alcaligenes Proteus Flavobacteria Pseudomonas Rhizobium Azotobacter
Nonspore - forming rod shaped bacteria Most nonspore – forming rod shaped bacteria are Gram - Representatives: Escherchia coli Alcaligenes Proteus Flavobacteria Pseudomonas Rhizobium Azotobacter
Vibrio,Spirillum and Spirochete Some bacteria are shaped vibrio like long rods twisted into spirals or helices;they are spirillum called vibrios (like commas or incomplete spirals), spirochete spirilla if rigid and spirochetes when flexable
Vibrio, Spirillum and Spirochete Some bacteria are shaped like long rods twisted into spirals or helices; they are called vibrios (like commas or incomplete spirals), spirilla if rigid and spirochetes when flexable. vibrio spirillum spirochete