IV. INVESTIGATION OF c. DIPHTIIERIAE
7. Bacteriocins
Present.
131
8. Antigenic structure
Not studied.
E. Corynebacterium variants with dwarf colonies
1. Habitat
I n human nasopharynx sometimes causing tonsillitis with mild
symptoms.
2. Morphology
Very short, minute rods, with pointed ends, pleomorphic, Grampositive but over-decolourising easily. Rare metachromatic bodies (Fig. 33).
3. Growth
Strictly aerobic; growth occurs at 37°C in 48-72 h.
On Loeffler slants-a very thin granular culture.
FIG. 33. Corynebacterium variant with dwarf colonies.