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Table 4 Correlation between blood feeding virus titres (CCID50/mL) and RT-qPCR titres (GCE/mL) derived from series 2 experiments

From: Assessment of the transmission of live-attenuated chikungunya virus vaccine VLA1553 by Aedes albopictus mosquitoes

 

Blood feeding virus titre

5.72 log10 CCID50/mL

Blood feeding virus titre

4.58 log10 CCID50/mL

Blood feeding virus titre

3.79 log10 CCID50/mL

Exp. 2.1*

Exp. 2.2*

Exp. 2.3†

Exp. 2.1*

Exp. 2.2*

Exp. 2.3†

Exp. 2.1*

Exp. 2.2*

Exp. 2.3†

Pre-feeding titre (log10CCID50/mL)

5.75

5.75

5.75

4.5

4.75

4.75

4.25

4.00

4.00

Post-feeding titre (log10CCID50/mL)

5.50

5.75

5.75

4.5

4.75

4.25

3.50

3.50

3.50

RT-qPCR run 1 (GCE/mL)∞

1.30E + 08

1.90E + 08

1.77E + 08

1.46E + 07

1.76E + 07

1.89E + 07

9.15E + 05

2.00E + 06

1.44E + 06

RT-qPCR run 2 (GCE/mL)∞

3.24E + 08

3.12E + 08

3.48E + 08

3.68E + 07

3.49E + 07

3.57E + 07

2.44E + 06

2.75E + 06

2.91E + 06

RT-qPCR run 3 (GCE/mL)∞

2.48E + 08

2.72E + 08

3.41E + 08

2.50E + 07

2.99E + 07

3.22E + 07

1.89E + 06

2.84E + 06

2.59E + 06

Average GCE/mL

2.34E + 08

2.58E + 08

2.89E + 08

2.55E + 07

2.75E + 07

2.89E + 07

1.75E + 06

2.53E + 06

2.31E + 06

Factor CCID50/mL versus GCE/mL

233.95

257.96

288.69

254.78

274.9

289.12

174.66

252.71

231.19

Average recovery control*

2.31E + 08

1.87E + 07

2.09E + 06

  1. Sheep blood freshly spiked with VLA1553 at respective CCID50/mL
  2. †0.5 h feeding; *1 h feeding; ∞LOD95% ≥ 10 GCE/reaction (2.5 × 103 GCE/mL); CCID50, 50% cell culture infectivity dose; Exp, experiment; GCE, genome copy equivalents