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Figure 4 | Veterinary Research

Figure 4

From: The introduction of a highly virulent PRRSV strain in pig farms is associated with a change in the pattern of influenza A virus infection in nurseries

Figure 4

Seroconversion and HI titre when animals were infected by swIAV for the first time. The graph shows the number of animals for which an increase in the HI titre ≥ X2 was observed after infection with respect to the HI titre determined when infected by swIAV for the first time. The animals were examined 2–4 weeks after infection, depending on the periodicity of sampling.

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Veterinary Research

ISSN: 1297-9716