Medical Microbiology

TheMorphologyandFineStructureofBacteria 147

BacterialMorphology

1 2 3 4

5 6 7 8

(^9101112)
13 a b c d e 14
Fig.3. 1

1. 
   

   Gram-positivecocciingrapelike
   clusters(staphylococci)

   
   


2. 
   

   Gram-positivecocciinchains
   (streptococci)

   
   


3. 
   

   Gram-positivecocciwithcapsules
   (pneumococci)

   
   


4. 
   

   Gram-positive,clubshaped,
   pleomorphicrods(corynebacteria)

   
   


5. 
   

   Gram-negativerodswithpointed
   ends(fusobacteria)

   
   


6. 
   

   Gram-negativecurvedrods
   (herecommashapedvibrios)

   
   


7. 
   

   Gram-negativediplococci,adjacent
   sidesflattened(neisseria)

   
   


8. 
   

   Gram-negativestraightrodswith
   roundedends(colibacteria)

   
   


9. 
   

   Spiralrods(spirilla)andGram-negative
   curvedrods(Helicobacter)

   
   

1 0.Peritrichousflagellation

11 .Lophotrichousflagellation

1 2.Monotrichousflagellation

1 3.Formationofendospores

(sporulation)incellsofthe

generaBacillusand

Clostridium(sporestain)

a)Centralspore,vegetative

cellshowsnoswelling

b)Terminalspore,vegetative

cellshowsnoswelling

c)Terminalspore(“tennis

racquet”)

d)Centralspore,vegetative

cellshowsswelling

e)Terminalspore

(“drumstick”)

1 4.Freespores(sporestain)

3

Kayser, Medical Microbiology © 2005 Thieme