Regression of Bovine Ocular Carcinoma by Treatment With a Mycobacterial Vaccine 2

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Abstract
Hereford cows with naturally occurring ocular squamous cell carcinoma were treated by injection of BCG cell-wall vaccine into the tumor. Regression or arrest of disease was observed in 71% of treated animals. The disease progressed in all untreated animals and animals treated with improperly compounded vaccine. At autopsy, most animals with progressive disease had lymph node metastases.