A 24-yr-old man developed sensitization to Quillaja bark (soapbark) dust at his work place. Within 3 mo of being employed in a factory processing Quallaja bark to produce saponin, he experienced asthma symptoms while handling the bark but only nasal symptoms on being exposed to the purified saponin.
Eighteen Barbarine lambs were assigned during 77 days to three dietary treatments (n=6): control, oat hay ad libitum and 400 g of concentrate; QS60 and the QS90 control diet supplemented with 60 mg and 90 mg Quillaja saponaria (QS) bark extract/kg dry matter, respectively. The analysis of pre-frozen
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