Evaluation of fecal shedding and antibody response in dairy cattle infected with paratuberculosis using national surveillance data in Japan

•Almost 55% of JD infected dairy cattle has early shedding period.•Early shedding starts 12 months after infection and last for 4 months.•Persistent shedding occurs in infected cattle, 7–84 months after infection.•Humoral antibody is expressed 7 months after the start of persistent shedding. Paratub...

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