Fig. 5: Histological examination of the teat cistern and mammary gland following re-exposure.
From: Dairy cows develop protective immunity against reinfection with bovine H5N1 influenza virus
Cow #4 and #11 were euthanized at 10 days post secondary inoculation (Day 41 post primary inoculation). Representative H&E staining of the teat cistern is shown for the hindquarters of both cows. Representative H&E images of the mammary alveoli from the hindquarters are pictured, showing multifocal lymphoplasmacytic to histiocytic inflammation in the stroma (black arrows). Cow #11 teat cistern shows squamous metaplasia of the epithelium (black star). Images were captured at ×200 magnification, insets are digital magnifications of the boxed area.
