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Figure 3 | BMC Veterinary Research

Figure 3

From: Anti-idiotypic antibodies reduce efficacy of the attenuated vaccine against highly pathogenic PRRSV challenge

Figure 3

Pathological examinations of the thymus and lung on 28 DPC. Thymus of a piglet from Group 1 (A), Group 2 (B), and Group 5 (E) showed blurred boundaries between the thymus cortex and medulla. Thymus of a piglet from Group 3 (C), Group 4 (D) and Group 6 (F) showed no microscopic lesions (magnification × 50). Lungs of a piglet from Group 1 (G), Group 2 (H) and Group 5 (K) showed interstitial pneumonia lesions, lungs of a piglet from Group 3 (I) and Group 4 (J) showed mild interstitial pneumonia, and a Group 6 piglet (L) was normal (magnification × 200).

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