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160<br />

I. Berdasarkan morfologinya, bakteri dapat dibedakan menjadi basil,<br />

kokus, dan spiral (Gambar 5.24).<br />

a. Basil (batang)<br />

Bakteri berbentuk batang dibedakan menjadi monobasil,<br />

diplobasil, dan streptobasil.<br />

1. Monobasil (batang tunggal).<br />

Contoh: E. coli, L. casei.<br />

2. Diplobasil (batang berkelompok dua-dua).<br />

Contoh: S. typhosa.<br />

3. Streptobasil (rantai batang).<br />

Contoh: Azotobacter dan B. anthracis.<br />

Kokus<br />

Batang<br />

Spiral<br />

Spiroketa<br />

Filamen<br />

Hifa<br />

(Brock Biology of microorganisms, 2006)<br />

Gambar 5.24. Variasi bentuk bakteri.

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