Eosinophil infiltration in the synovium of rats developing antigen-induced arthritis. Representative sections of arthritic knee (mBSA-injected) 7 hours after arthritis induction are shown. (a) Hematoxylin/eosin/safran staining (magnification 100×). (b) May-Grünwald Giemsa (magnification 63×). Eosinophils are indicated by arrows. mBSA, methylated bovine serum albumin.
Paquet et al. Arthritis Research & Therapy 2012 14:R60 doi:10.1186/ar3774