#Appearances of the colonies :-
Staphylococci -Oil paint appearance
(nutrient agar )
Pnumococci -Draughtmann/ carom coin appearance ( blood agar)
Corynebacterium -Chinese letter or
cuneiform arrangement
Bacillus
1) Bamboo stick appearance
2) Medusa head appearance( agar plates )
3) Inverted fir tree appearance( gelatin
stab culture)
Cl. perfringens
1) Stormy fermentation( litmus milk)
2) Target haemolysis(rabbit, sheep, human blood agar)
Cl. tetani -Drum stick appearance
Vibrio cholarae -Fish in stream appearance
Yersinia pestis
1) Safety pin appearance
2) Stalactite growth
H.influenzae -Satellitism
H. ducreyi -School of fish / rail road track appearance
Bordetella pertusis
1)Thumb print appearance
2)Bisected pearls / mercury drops(bordet- gengou medium)
3)Aluminium paint appearance
M. leprae -Cigar bundle appearance
Mycoplasma -Fried egg appearance
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