A total of 96 pigs (initially 19 lb and 17 d of age) was used in a 28 d growth trial to
determine the effects of Quillaja saponaria
(QS) extract on weanling pig growth performance and immune function in response to enteric disease challenge with Salmonella
typhimurium (ST). Experimental treatments
were arranged in a 2 × 4 factorial with main
effects of disease challenge (control vs. ST
challenge) and dietary addition of QS (0, 4,
8, or 16 oz/ton). The results suggest little
beneficial effect of QS on growth performance
or immune response in the presence or absence of ST challenge.
