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. 2007 Jan 12;49(1):3. doi: 10.1186/1751-0147-49-3

Table 1.

Mean, standard deviation (SD), range and number of positive results of number of serum samples tested for antibodies against BHV-1 in 1965–1989

Period No of samples examined annually
Mean SD Range Nr positives
1965 – 1973 68 54 4 – 159 101
1974 – 1985 661 158 335 – 890 0
1986 – 1989 2126 1126 523 – 2947 0

1: AI bulls at a station in 1970–1971