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shapes of bacteria and their names
shapes of bacteria diagram
shapes of bacteria class 11
shapes of bacteria شرح
different shapes of bacteria diagram
types of bacteria shapes
fundamental shapes of bacteria
(i) Coccus (Pl. Cocci) : These are always nomotile / nonflagellated. Spherical or oval shaped.
(1) Monococcus : Occurs singly e.g. Micrococcus roseus, Micrococcus luteus.
(2) Diplococci : Present in pairs e.g. Diplococcus pneumoniae.
(3) Streptococci : Occur in chains e.g. Streptococcus lactis.
(4) Staphylococci : They occur in grape like irregular clusters/bunches e.g. Staphyloccus aureus.
(5) Sarcinae : They are divided in three planes and form cubical packet of 8–64 cocci e.g. Sarcinae
lutea.
(ii) Bacillus (Pl. Bacilli) : Rod shaped with blunt ends and motile/nonmotile. It is most common shape.
(1) Monobacillus : Occurs singly.
(2) Diplobacilli : Occur in pair.
(3) Streptobacilli : Occur in chains.
(iii) Spiral : They are elongated, spiral shaped, flagellated and cork screw like. A spirillum contains one
or more turns 10–50 m length. e.g. Spirillum volutans.
(iv) Vibrio :
It is look like sign of comma ( , ) and slightly curved rod of less than half turn e.g. Vibrio cholerae.
 Other shapes of bacteria are as follows –
(i) Pleomorphic : Bacterium is found in more than one form e.g. Azotobacter, Rhizobium.
(ii) Stalked bacterium : Bacterium has a stalk e.g. Caulobacter.
(iii) Budded bacteria : Its body is swollen at places e.g. Rhodomicrobium.
(iv) Mycelial bacteria : They bear aseptate branched filamentous body like a fungal mycelium
e.g. Beggiatoa, Actinomycetes.

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