Table 2.
Plate and broth counts of M. tuberculosis in spleen and lungs of mice with acute and chronic infections
| Infection | Mouse organ | Type of count* | Mean count | SD | 95% confidence limits | |
| Acute (6 mice) | Spleen | Plate | 7.070 | 0.214 | 6.845 | 7.295 |
| Broth | 6.663 | 0.771 | 5.854 | 7.472 | ||
| Lungs | Plate | 6.703 | 0.095 | 6.603 | 6.803 | |
| Broth | 6.609 | 0.421 | 6.167 | 7.050 | ||
| Chronic (27 mice) | Spleen | Plate | 3.858 | 0.882 | 3.509 | 4.207 |
| Broth | 5.290 | 0.820 | 4.966 | 5.614 | ||
| Lungs | Plate | 3.662 | 1.462 | 3.084 | 4.240 | |
| Broth | 5.523 | 0.939 | 5.152 | 5.894 | ||
* Plate counts are log10 cfu/organ. Broth counts are log10 probable number of bacilli/organ