[A few characteristics of mouse having high sensibility to anaphylatic shock separated from El mouse (author's...

During an experiment of shaking in El mice, a strain which was less susceptible to convulsion was found out. In this strain (ASK), the mortality to anaphylactic shock and susceptibility to audiogenic seizure were compared with five other strains of mice. Six strains of mice (ASK, EL, IDT, JCC-ICR, dd, C57BL/6J) were sensitized by two subcutaneous injections with 2 mg/head of crystalline egg albumin at five and six weeks of age, and then challenged by the intravenous injection of 0.125, 1, 8, 64, 512 and 4096 mug/head at seven weeks of age. In both sexes of ASK strain, the mortality was the maximum (75--95%) after the challenge of 8--4096 mug egg albumin. The mortality of the female El and IDT and the both sexes of JCL-ICR strains was middle (55--70%) after the challenge with 64 mug egg albumin, while that of other strains (dd and C57BL/6J) was very low (0--20%). The susceptibility of 3-weeks-old mice of ASK, El, IDT, JCL-ICR and dd strains was low (1.9--19.0%), whereas mice of DBA/2 strain showed a very high susceptibility (80%) to 110 phons.