Folia Parasitologica: Folia Parasitologica - Latest articles1983/01/04 · of the serovars used at...
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Folia Parasitologica: Folia Parasitologica - Latest articles1983/01/04 · of the serovars used at the titre of 100 or higher. Positive reactions were seen in 8 (1.8 0/0) of 434 birds