Table 2.

DTH response to PPD in vaccinated mice prior to challenge

Group	DTH*
1. Non-vaccinated control	0·08 ± 0·03
2. M. bovis BCG-Prague	0·24 ± 0·03
3. M. smegmatis::p16R1	0·18 ± 0·03
4. M. smegmatis::p16R1-19	0·07 ± 0·01**
5. M. smegmatis::cosmid 19-kD	0·15 ± 0·03
6. M. vaccae::p16R1	0·16 ± 0·02
7. M. vaccae::p16R1-19	0·04 ± 0·02**

^*Footpad swelling (mm) ± s.e.m.

^**Significant (P = 0·01) decrease compared with corresponding vector control.