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Figure 4 | Veterinary Research

Figure 4

From: Intranasal inoculation of sows with highly pathogenic porcine reproductive and respiratory syndrome virus at mid-gestation causes transplacental infection of fetuses

Figure 4

Immunohistochemical detection of HP-PRRSV in the fetal spleen at 7 dpi. (A, C) Negative control splenic tissue, in which mouse IgG was substituted for the primary antibody; (B) spleenic tissue from the day 60 infected group; (D) spleenic tissue from the day 90 infected group. All images are shown at ×40 magnification.

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