Immunoreactivity and grading of inflammatory markers in association to human cytomegalovirus (HCMV) antigens burden. (A-C) Immunoreactivity and grading of 5-lipoxygenase (5-LO) (A), CD3 (B) and CD68 (C) in plaques. (D) Summary of grading results for HCMV immediate early (IE), late antigen (LA), 5-LO, CD3 and CD68 in plaques. (E-G) Association of HCMV IE antigens with 5-LO (E), CD3 (F) and CD68 (G). Positivity was revealed by diaminobenzidine (DAB), brown products.