Pathological Characteristics of Domestic Pigs Orally Infected with the Virus Strain Causing the First Reported African Swine Fever Outbreaks in Vietnam

Figure 1. Mean of daily rectal temperatures (°C) of the ASFV- infected and un-infected pig groups. * p < 0.05.

Figure 2. The survival rate of ASFV-infected (blue) and un-infected (green) pigs.

Figure 3. Mean clinical scores of ASFV-infected (red line) and un-infected (blue line) pig groups. The scores were calculated as previously described by I. Galindo-Cardiel and H. S. Lee [24,28]. (* p < 0.05).

Figure 4. Some of the clinical signs of pigs infected with ASFV. (A) Fever; (B) diarrhea; (C) petechial hemorrhages on the skin; (D) erythema and skin hemorrhages.

Figure 5. The mean viral load (Ct value) of the ASFV in oral fluids collected from the ASFV-infected pig group.

Figure 6. Gross pathological lesions were observed in pigs infected with ASFV. (A) Congested and enlarged spleen (red arrow); hemorrhagic mesenteric lymph nodes (red circle); enlarged liver with hemorrhages (blue arrow); (B) hemorrhagic meninges; (C) congested and interstitial pneumonia; (D) hydropericardium (black arrow); (E) enlarged and hemorrhagic inguinal lymph nodes; (F) petechial hemorrhage in kidneys; (G1) hemorrhagic tonsils; (G2) enlarged and hemorrhagic mandibular lymph nodes; (G3) mediastinal lymph nodes; and (G4) inguinal lymph nodes; (H) gastric mucosa with superficial lesions and hemorrhage; (I) petechiae gallbladder wall (black arrow).