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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