Table 2

Survival of bacterial cells after protease treatment

Treatment

CFUs (× 10⁸ cells/ml)

Statistical significance ^a

Control

2.96 ± 0.55

-

Trypsin

2.66 ± 0.21

NS

Proteinase K

2.86 ± 0.31

NS

Counting of CFUs (colony-forming units), after plating on THY plates supplemented with 5% sheep blood, Streptococcus suis serotype 2, strain 235/02 treated with trypsin or proteinase K for digestion of surface proteins of live cells. No protease was used in the controls.

^a Statistical significance was calculated by applying the Student's t-test (P < 0.05) when comparing treatments to the control: NS, not significant.

Rodríguez-Ortega et al. BMC Genomics 2008 9:588   doi:10.1186/1471-2164-9-588