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. 2004 Sep 17;102(4):389–397. doi: 10.1016/j.vetimm.2004.08.001

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Copyright © 2004 Elsevier B.V. All rights reserved.

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Fig. 1 — Differential course of rectal body temperature in eight piglets after intranasal infection with virulent PRV strain NIA-3. (A) The course of the temperature of two animals which developed fever (>40 °C) until day 6 post infection. (B) The course of rectal temperature of two animals from which one (No. 29) showed a moderate rise in body temperature. (C) The mean temperature course is summarized for four animals which showed rather a drop in body temperature than a rise after intranasal infection. After intramuscular (i.m.) injection of the same dose of PRV in non-febrile animals (B and C) at day 6 after intranasal application (arrows) all six piglets developed fever within 6 days.