i dont know ....

2. •Mr. Ravi kumar
•B.S.C (N)1st year
•Chirayu college of
nursing

3. MORPHOLOGY OF BACTERIA
Morph means ‘’Form’’ and ‘’ology’’ means the
study.
 Bacteria form a large group of unicellular
prokaryotes that do not contain a nucleus and
other membrane bound organelles.
They were first observed by antony van
leeuwenhoek in 1676 using a single lens
microscope of his own design.

4.  he called them ‘animalcules’ and published
his observations in a series of letters to the
royal society of london.
The name bacterium was introduced much
later by Christian Gottfried Ehrer berg in
1838.
Typically a few micrometers in length, bacteria
have a wide range of shapes, ranging from
spheres to rods and spirals.

5. SIZE OF BACTERIA-
bacterial cells are about one tenth the sizes of
eukaryotic cells and are typically 0.5- 5.0
micrometers in length.0.2-1.5 micrometers in
diameter.
Some bacteria may be even smaller, but these
ultra microbacteria are not well-studied.

6. SHAPE OF BACTERIA/ MORPHOLOGICAL TYPES:-
1.Cocci- these are spherical or oval cells.
Micrococci – occur singly
Diplococci- occur in pair
Streptococci- cocci that occur in chains
Staphylococci- occurs in bunches
Tetrad- cocci that occurs in four
Sarcina- cocci that occur in group of eight

7. 2. bacilli- these are rod or stick- shaped cells.
On the basis of arrangement of the individual
organism they may be:-
 microbacill- bacilli that occur singly.
Diplococci-bacilli that occur in pairs.
Streptobacilli- bacilli that occur in chains.

8. Palisade arrangement- bacilli lined side by side
like matchsticks and at angles to one another.
Eg- corynebactrium diphtheriaea causing diptheria
 comma- shaped- bacilli that are curved and look
like a comma
Eg- vibrio cholera causing cholera
Spirillum- bacilli which are coiled like a cork-
screw through 1-5 complete turns eg- spirillum
minus causing rat bite fever.

9. 3. coccobacillus- these are the bacteria which
are intermediate to coccus and bacillus eg-
brucella
4. spirochetes- they are relatively longer,
slender, flexous, non- branched
microorganism of spiral shape having several
coils eg- treponema pallidum causing syphilis