Mapping geographical areas at risk for tick-borne encephalitis (TBE) by analysing bulk tank milk from Swedish dairy cattle herds for the presence of TBE virus–specific antibodies

Table 3 TBEV modified indirect ELISA (mE) S/P % value of paired bulk tank milk samples collected in May and November

S/P % values	Number of bulk tank milk samples/herds
S/P % values	May	November
< 12	514	484
12–19	23	43
≥ 20	17	27
Total number of herds	554	554

Samples were analysed in modified indirect ELISA (mE)
S/P % values of < 12 were considered negative, S/P % values of 12–19 doubtful, and ≥ 20 positive, for the presence of antibodies

ISSN: 1751-0147