Larval survival after DNA immunization with tropomyosin, LEC-5, and the Na+-K+ATPase. Results depicted are the combination of two experiments. Data shown are the means (horizontal bars) of the groups, with 12 (Na+-K+ATPase), 5 (tropomyosin), 5 (LEC-5), 7 (All plasmids), and 11 (control) mice per group. The asterisk denotes statistical significance (P = 0.05) from the control.