Serum IgA and bactericidal immunity against Streptococcus suis serotype 2 is increasing between 2 and 6 weeks of age in a farm with autogenous bacterin vaccination pre-farrowing, while specific maternal IgG is decreasing.

Porcine Health Manag · 2026 · PMC12896002 · PMID 41535925

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highly significantno p-value reported

In contrast to IgG, we observed a prominent and highly significant increase in serum IgA binding to S. suis cps 2 between the 2nd and 6th week of life and between the 6th and 10th week of life (Fig. 5 B).

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