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Fig. 4 | BMC Veterinary Research

Fig. 4

From: Attenuated Actinobacillus pleuropneumoniae double-deletion mutant S-8∆clpP/apxIIC confers protection against homologous or heterologous strain challenge

Fig. 4

Levels of IgG antibody (a), IgG1 (b), and IgG2 (c) in the sera of piglets. Blood samples were collected prior to and following immunization on days 0, 21, and 35 from the S-8△clp△apxIIC immunized groups and PBS control groups, and the antibody responses were determined by indirect ELISA. The results are expressed as the means ± SD

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