(1)The presence of vitamin B
12-producing microorganism belonging to
Actinomycetes was positively confirmed in poultry droppings.
(2) However, in any part of alimentary canals of poultry, no
Actinomycetes was ever detectable.
(3) Hence, vitamin B
12 in poultry droppings seem to be as an extrinsic factor, and so the relation between the vitamin B
12 nutrient in poultry droppings and
Actinomycetes may be considered as in the following shema:
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