div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Folia Parasitologica: Folia Parasitologica - Latest articles19830104 · of the serovars used at the titre of 100 or higher Positive reactions were seen in 8 18 00 of 434 birds src=https:reader035fdocumentsinreader035viewer20220626116134bee6dfd10f4dd73bed73html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Folia Parasitologica: Folia Parasitologica - Latest articles19830104 · of the serovars used at the titre of 100 or higher Positive reactions were seen in 8 18 00 of 434 birds src=https:reader035fdocumentsinreader035viewer20220626116134bee6dfd10f4dd73bed73html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb alt=Page 3: Folia Parasitologica: Folia Parasitologica - Latest articles19830104 · of the serovars used at the titre of 100 or higher Positive reactions were seen in 8 18 00 of 434 birds src=https:reader035fdocumentsinreader035viewer20220626116134bee6dfd10f4dd73bed73html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdiv