Selenium Deficiency in Chicks Induced by Feeding Yeast Grown on Methanol as a Sole Dietary Protein Source

The Use of Methanol-Grown Yeast LI-70 in Feeds for Broilers

“…As those chicks were necropsied, we observed fragility of the capillaries with extensive hemorrhaging and edemas consisting of a greenish gelatinous fluid, especially in the thorax and groin, characteristic of the exudative diathesis appearing in chickens lacking selenium. Similar mortality rates and anatomico-pathological findings were reported for this kind of trial by Ikumo et al (1978).…”

“…Nesheim and Scott (1958) observed exudative diathesis in chickens fed diets containing Torula yeast as the protein source and also deficient in selenium and vitamin E. Thompson and Scott (1969) observed pancreatic dysfunctions in chickens fed diets lacking selenium. Ikumo et al, (1978) noted similar symptoms in chickens fed diets containing a methanol-grown yeast as the sole protein source. They showed that the addition of .5 ppm selenium to such diets completely eliminated the exudative diathesis and pancreatic dysfunctions.…”

Evaluation of methanol‐grown bacteria and hydrocarbon‐grown yeast as sources of protein for poultry: Studies with young chicks

“…The selenium content of yeast is very low, and several authors have obtained favourable responses from the addition of this trace mineral to yeast-containing diets (Gropp et al, 1975b;Van Weerden <t f a/,, 1976;Ikumo et al, 1978;Hewitt and Labib, 1978). Selenium has been included in our trace mineral mixes since 1976 or 1977, but we do not know which mix was used in each of the trials presented here.…”