In vitro stimulation of blood lymphocytes by phytohaemagglutinin during the development of Marek's disease.
The in vitro responsiveness to phytohaemagglutinin of peripheral blood lymphocytes taken from chickens during the development of Marek's disease was studied. There was a transient depression of stimulation in the early stages of the disease, particularly at 1 week after infection, but depression of responsiveness was not observed later. The discrepancies between these results and other published results are discussed.
Powell
P C
PC
Houghton Poultry Research Station, Houghton Huntingdon, Cambs., PE 2DA, United Kingdom.