The sensitivity of the hemolysis-in-gel (HIG) test with rubella antigen is not improved by chemical linkage of the virus to the erythrocytes, and after such modification, IgM specific antibodies are not detectable. In the influenza HIG test with tetraazotized o-dianisidine (TOD), chromic chloride
Concurrent viral infection and myocarditis presumably indicate viral myocarditis. The electrocardiographic and pathologic changes developing during acute infection may, however, result from changes not produced by the infection itself, eg, fever, tachycardia, ischemia, potassium depletion, vitamin