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Table 2 Plate and broth counts of M. tuberculosis in spleen and lungs of mice with acute and chronic infections

From: Mycobacterium tuberculosis from chronic murine infections that grows in liquid but not on solid medium

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
  1. * Plate counts are log10 cfu/organ. Broth counts are log10 probable number of bacilli/organ