The Effectiveness of Anti-R. equi Hyperimmune Plasma against R. equi Challenge in Thoroughbred Arabian Foals of Mares Vaccinated with R. equi Vaccine

Table 1

Macroscopic lesions scores in lungs and organs after necropsy.

Postmortem Lesion Scores
Organs	No lesion (0)	Mild (1)	Moderate (2)	Severe (3)	Very severe (4)
Lung	Without lesions	With 2 to 3 small pyogranulomas or large abscess formation limited to only one lobe of the lung and focal consolidation	With four to five pyogranulomas limited to two lobes of the lung multifocal consolidation and large abscess formation	With a large number of differently sized pyogranulomas limited to three lobes or between the right and left lobes of the lung	With military or differently sized pyogranulomas spread over all lobes of the lung
Lymph; node	Without lesions	With slight growth	With mild growth	Overgrown and with limited pus foci of the cross-sectional surface	Overgrown and purulent
Heart	Without lesions	With slight paleness	With a wide area of paleness in the epicardium and endocardium or pyogranuloma	With a wide area of paleness in the cross-sectional area or a few pyogranulomas	With a wide area of paleness in the cross-sectional area or several pyogranulomas
Liver	Without lesions	Slightly enlarged and congested	Enlarged and mottled appearance or with pyogranuloma	With numerous pyogranulomas in the cross-sectional area and under the capsule	With pyogranulomas spread over the entire surface and the cross-sectional area
Kidney	Without lesions	Slightly enlarged	Enlarged kidneys and mottled appearance	Enlarged kidneys and with pyogranuloma in the cross-sectional area and infarction area	Enlarged kidneys and with numerous pyogranulomas in the cross-sectional area and infarction area
Spleen	Without lesions	Slightly enlarged	Overgrown and with pyogranuloma in the cross-sectional area	Overgrown and with a few pyogranulomas in the cross-sectional area	Overgrown and with numerous pyogranulomas in the cross-sectional area