Of the two S. parasuis strains, NN1 induced higher transcription levels of the TLR2 gene in primary astrocytes before 18 h post-infection and in BV2 cells at 4 h post-infection, whereas BS26 induced higher transcription levels of the TLR2 gene in BV2 cells at 8 h and 12 h post-infection (Figure 3G,H). The gene discussed is TLR2; the disease is infection.