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Figure 1 | Veterinary Research

Figure 1

From: Cross protective immune responses in nursing piglets infected with a US spike-insertion deletion porcine epidemic diarrhea virus strain and challenged with an original US PEDV strain

Figure 1

Schematic diagram of the experimental design and serum PEDV specific antibody responses of piglets. A Age of piglets (days), virus inoculation and challenge with original US PEDV strain were shown. Piglets were inoculated with the respective virus inoculum at 3–4 days of age and the remaining piglets were challenged with US PEDV strain PC21A at 20–29 days post-inoculation (dpi). B Piglet serum virus neutralization antibody titers were quantified by plaque reduction virus neutralization assay. C Piglet serum virus-specific-IgA antibody responses were measured by ELISA. Different alphabetical letters indicate significant differences (p < 0.05) at the same time point among groups, whereas the same letters indicate no significant difference. Dpi: day post-inoculation, dpc: day post-challenge.

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