https://ag-881inhibitor.com/zi....nc-shields-towards-m
Both global PCV2 genotype shifts were seen. PCV2a occurred with a low prevalence during the very first research many years only in examples from non-vaccinated swine herds and had been slowly replaced by PCV2b until 2011. PCV2b ended up being the absolute most prevalent genotype throughout the entire study period and had been detected in samples from vaccinated and non-vaccinated herds. Over the last two study years, the prevalence of PCV2d enhanced, although at this point practical
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