Abstract
Summary The long or short electrophoretic migration patterns of group A human rotaviruses are linked to their subgroup antigenic specificities. Long pattern isolates usually belong to subgroup 2 (SG2) and short pattern to subgroup 1 (SG1). To date detection of only 4 isolates which do not follow this linkage, have been reported. In the present communication we report the detection of unusually large number (39 isolates) of long pattern human isolates with SG1 specificities.