Figure 2

Macroscopic lesions in pigs infected with Salmonella Choleraesuis at 21 days post-infection. A Lung of an animal from the positive control group presenting an increased size and moderate interstitial pneumonia in the right cranial and middle lobes (white asterisk). B Thoracic and abdominal cavities of an animal from the immunized group presenting organs without lesions. C Spleen and intestine of an animal from the positive control group showing adherence of connective tissue (black asterisks); moreover, the spleen presents multiple abscesses of purulent material (inset).