A STUDY OF THE RESPIRATORY SIGNS OF CHOREA MINOR

St. Vitus' dance, Sydenham's chorea, chorea minor, is a distinct clinical entity and while the specific organism or toxic agent has not been definitely isolated, the work in this direction and the natural history of the disease has been and is such as to warrant the deduction now generally admitted, that it is a disease of bacterial or toxic origin. Clinically, chorea minor may be readily differentiated from other conditions resembling it but the differentiation is not always made and hence other conditions are often erroneously diagnosed chorea. This is notably true of the tic conditions. Again the usually observed motor manifestations of chorea may be and frequently are so slight that the true nature of the trouble remains unrecognized. The reason for such errors in diagnosis and for the non-recognition of the disease in its milder forms is to be found in the habit of basing the diagnosis on