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Table 3 Plate and broth counts of M. tuberculosis in spleen and lungs of mice with chronic infections, when plate counts had no colonies

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

Organ with no colonies in plate counts* No. of mice Organ Type of count Mean count SD 95% confidence limits
Spleen & lungs 2 Spleen Broth 3.728 0.708 -2.638 10.094
   Lungs Broth 4.247 1.428 -8.580 17.073
Lungs only 7 Spleen Plate 3.079 0.960 2.192 3.968
    Broth 4.347 0.823 3.586 5.108
   Lungs Broth 4.202 0.624 3.625 4.778
  1. * A count of <1.40 log10 cfu/organ
  2. Plate counts are log10 cfu/organ: broth counts are log10 probable number of bacilli/organ