As shown in Table 3, collapse
and cyanosis were observed in almost all 31 of the dogs,
with 27 (87.1%) demonstrating collapse, 24 (77.4%) demonstrating
cyanosis, and 22 (71.0%) showing both signs. A
single death (Chihuahua, intact female, 2 months, 0.9 kg),occurring 38 h after vaccination, was reported in our questionnaire.