Rollins-Smith L A, Cohen N
Dev Comp Immunol. 1982 Spring;6(2):303-9. doi: 10.1016/s0145-305x(82)80013-x.
Two to 3-month old tadpoles (Rana pipiens), thymectomized 2-3 weeks postfertilization, exhibited: sharply reduced numbers of splenic and blood lymphocytes; no in vitro lymphocyte responsiveness to PHA; and normal in vitro lymphocyte reactivity to LPS. These results reveal lymphocyte heterogeneity in this anuran species.