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Table 3 Influenza viral loads in various types of clinical specimens collected from patients infected with different virus subtypes.

From: Influenza A viral loads in respiratory samples collected from patients infected with pandemic H1N1, seasonal H1N1 and H3N2 viruses

     

Log10 M RNA copy number in

Virus

Number of cases

Statistics

Age

Days after onset

NPA

NS

TS

Pandemic A/H1N1/2009

12

Mean

12

5

7.5a, b

6.5a, c

4.1b, c

  

Median

8

5

7.5

6.9

4.9

  

Range

3-53

2-10

5.8-8.9

2.7-8.7

Und.-6.9

A/H1N1

5

Mean

5

5

7.8

7.2

7.4

  

Median

4

4

8.5

6.4

7.7

  

Range

1-12

2-10

4.7-8.9

5.5-9.3

5.8-8.7

A/H3N2

12

Mean

17

5

8.0a, b

6.6a

5.6b

  

Median

4

5

8.1

7.2

6.8

  

Range

1-69

2-6

5.8-9.2

3.5-8.3

Und.-7.7

  1. The viral loads are reported as log10 of M segment copy number/1 ml of VTM. Pair t-test was used to compare the mean log10 viral loads in different types of specimens collected from the same subjects and at the same time.
  2. a indicates a significant difference of the viral loads in NPA and NS, b in NPA and TS and c in NS and TS (Pair t-test, P < 0.05).
  3. Und., below detection limit; NPA, Nasopharyngeal aspirate; NS, Nasal swab; TS, Throat swab.
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Virology Journal

ISSN: 1743-422X