| is a diagnostic system based exclusively on agar gel immunodiffusion adequate for controlling the spread of equine infectious anaemia? | to improve the efficiency of the national equine infectious anaemia (eia) surveillance program in italy, a three-tiered diagnostic system has been adopted. this procedure involves initial screening by elisa (tier 1) with test-positive samples confirmed by the agar gel immunodiffusion test (agidt) (tier 2) and, in the case of elisa positive/agidt negative results, final determination by immunoblot (ib) (tier 3). during this evaluation, 74,880 samples, principally collected from two regions of cen ... | 2013 | 23618837 |