Abstract
Cats were sensitized by repeated injections of dogs serum or sheep serum. Intraarterial injections of the antigen by way of the A. occipitalis into the ganglion cervicale craniale caused an increased response of the nictitating membrane to the preganglionic submaximal stimulation. This effect of the antigen serum was observed in sensitized cats by so small doses as to remain ineffective in normal cats. These effects were transient and limited for the length of intraarterial injection. Their interpretation as histamine- or serotonine-action is discussed. There is no evidence of the ganglion itself reacting as an organ in a truly anaphylactic sense.
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