Table 6.

Natural killer cell and antigen-presenting cell populations of dogs supplemented with a yeast fermentation product

	Saccharomyces cerevisiae fermentation product, mg/d					P-value
Item	0	125	250	500	SEM	Linear	Quadratic	0 vs. yeast
Natural killer cell, % of lymphocyte	14.34	10.52	10.27	12.55	3.07	0.39	0.12	0.11
Antigen-presenting cells
B cell, % of lymphocyte	8.08	7.35	9.37	7.96	2.51	0.44	0.86	0.85
B cell, MHC II+, % of B cell1	96.26	97.20	97.44	97.25	1.56	0.12	0.29	0.05
Monocyte, % of white blood cell	4.16	4.29	4.77	3.99	2.37	0.81	0.95	0.73
Monocyte, MHC II+, % of monocyte1	55.90	51.18	59.04	61.33	7.63	0.86	0.68	0.05

¹B cells or monocytes that present major histocompatibility complex class II (MHC II).