Characterization and susceptibility of streptococci and enterococci isolated from Nile tilapia (Oreochromis niloticus) showing septicaemia in aquaculture and wild sites in Egypt

Table 2 Differential diagnosis between different bacterial species using growth conditions

Isolate	Growth at		Growth on 6.5% NaCl BHI agar			Growth at 40% Bile Salt BHI agar
Isolate	10^ͦ C	45^ͦ C	After 24 h	After 48 h	After 72 h	After 7 days
Aerococcus viridans	After 48 h (very faint) but good after 72 h	+	No growth	Very weak growth	Weak growth	No growth
E. faecalis	after 48 h	+	Very weak growth	Good growth	Very good growth	No growth
Lactococcus garvieae	after 48 h (very faint) but good after 72 h	+	No growth	Very weak growth	Very good growth	No growth
S. pluranimalium	After 48 h	+	very weak growth	Very weak growth	Very good growth	No growth
E. gallinarum	After 48 h (very faint) but good after 72 h	_	No growth	No growth	No growth	No growth
S. dysgalactiae subspecies equisimilis	No growth	+	No growth	No growth	No growth	No growth
S. anginosus	No growth	No growth	No growth	No growth	No growth	No growth

ISSN: 1746-6148