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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Virology. 2016 Feb 11;491:79–88. doi: 10.1016/j.virol.2016.01.015

Table 4.

Virus titers in nasal swabs at 1 to 5 days post infection (dpi) and bronchoalveolar lavage fluid (BALF) at 5 dpi from pigs with maternally-derived antibodies (MDA) from sows vaccinated with H1N2-δ1(1:7) WIV or without MDA and challenged with homologous H1N2-δ1(1:7) or heterologous H1N1pdm09(2:6) in Study 1. Values shown as mean ± standard error of the mean (SEM).

Challenge Groups Nasal swabsx BALFx

1 dpi 2 dpi 3 dpi 4 dpi 5 dpi 5 dpi
No MDA/NC 0.0 ± 0.0a 0.0 ± 0.0a 0.0 ± 0.0a 0.0 ± 0.0a 0.0 ± 0.0a 0.0 ± 0.0a
Homologous
No MDA/H1N2 1.5 ± 0.4b 1.9 ± 0.4b 2.3 ± 0.4b 2.8 ± 0.3b 2.8 ± 0.2b 3.9 ± 0.5b
WIV-MDA/H1N2 0.0 ± 0.0a 0.1 ± 0.1a 0.8 ± 0.4a 0.8 ± 0.4a 0.1 ± 0.1a 2.7 ± 0.7b
Heterologous
No MDA/H1N1 1.2 ± 0.2b 1.0 ± 0.1b 1.0 ± 01a,b 1.5 ± 0.2b 1.0 ± 0.2b 0.7 ± 0.4a
WIV-MDA/H1N1 1.3 ± 0.3b 0.5 ± 02a,b 1.4 ± 0.2b 1.2 ± 0.2b 1.0 ± 0.2b 1.3 ± 0.4a
x

Virus titers represented as log10 TCID50/ml.

a,b,c

Statistically significant differences in the same column identified with different lowercase letters (P ≤ 0.05).