Several small scale of BVD field test wereconductelinTapu. Beforet, the infection of BVD in Tapu by antibody survey method was chat]. Fifty-nine samples ofhnpcrteicattleinTapu were all BVD-antibody pocsitive with tier of over 1.73 (Lsg 10). The first generation of Tapu cattle was all antibody poGitive with tier of 0.58-2.45. The second generation of 49 cattle samples showerl 91% of BVD-pothtive with antibcdytitrof2.21 or over.
In the province, the invesngation on BVD antibody of cattle was made. The result were as follows: The highest incidence of county was Hsin Chu (86%) and Maoli (85%) with tier around 1,75 or over. Then Kaohsiung (35%) with tier bolow 1.05. QiangHua(32.6%)andTaiChuag (43%) werenextk Kaohsiuagwithtiterof 1.75 Or over. The other counties had under 30% incidence. Jn Penghu, 105 yellow cattle were surveyerlandonly3ones itive(2.8%)with tier of l.75.Fromtheabovedata, BVD infection of cattle in Taiwan was quitu sure. The routu of infection might ke caused by iraportel cattle.