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Plasma Phosphatase Activities of Normal and Lymphomatous Chickens

( U.S. Department of Agriculture, Agricultural Research Service, Regional Poultry Research Laboratory, East Lansing, Mich.)

A study was made of the activity of acid phosphatase, alkaline phosphatase, and adenosine triphosphatase in the plasma of normal and lymphomatous chickens.

The acid phosphatase activity of plasma of all normal and lymphomatous chickens tested was very low, with no significant differences between the two types.

A study was also made of the alkaline phosphatase of normal chicken plasma for the period from hatching to 500 days of age. It was found that alkaline phosphatase activity increased rapidly in the chick plasma immediately following hatching, reaching a peak between the 5th and 16th day, then gradually decreasing by 100 days to a low level which was maintained to 500 days of age. Alkaline phosphatase activity of plasma from lymphomatous chickens was found to be considerably lower than that of the nonlymphomatous chickens.

High levels of adenosine triphosphatase activity were found in plasma of 40 of the 42 lymphomatous birds tested, while none of 297 normal birds had a reaction in 20 minutes; however, after an incubation period of 2 hours, all plasma gave a positive reaction.

^* Present address: Argonne National Laboratory, Lemont, Ill.

Received 4/25/55.