Brucella abortus Strain RB51 Vaccine: Immune Response after Calfhood Vaccination and Field Investigation in Italian Cattle Population

Table 1

Number of sera from the National Serum Bank (NSB, collected during the 2001–2003 period) and tested with RB51-CFT, on regional basis.

Region of origin	No. of sera tested	No. of herds tested
Abruzzo	2,123	177
Apulia	1,836	207
Basilicata	1,957	222
Calabria	1,064	111
Campania	1,062	117
Liguria	2,552	193
Marche	2,825	238
Molise	2,584	217
Piedmont	2,489	139
Sardinia	1,282	110
Sicily	1,446	114
Umbria	1,196	103
Total	22,416	1,948