| Summary |
The distribution of neutralization antibodies against Pseu-dorabies was studied by using random sampling from slaughter pigs in Taiwan. Out of 2193 Samples, 46 revealed the SN titer of 1: 4 or higher with an incidence of 2.1%. T he variations of the incidence of positive SN titer among different areas were shown as follows : Tauyuan prefecture (P) 8.3% (5/60) , Yilan P, 7 .5% (3/40) , Taichung city (C) 5.0% (1/20) , Changhwa P. 0.5% (l/002) , Nantou P. 5.5% (3/55) , Yunlin P. 1.0% (2/200) , Chiayi P. 10.0% (10/100) , Tainan P. 0.3% (l/300) , Kaohsing P. 1.3% (4/300) , Pintung P. 4. 7% (14/300) and Penghu P. 10.0% (2/20) .
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