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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