Ten of those 9-month-old calves had received only the first dose of a blackleg vaccine at 4 months of age, but no booster. The last two affected calves belonged to a herd that had never been vaccinated. Four out of five calves treated with penicillin for 6-7 days recovered from the ...
This disease can be easily prevented with vaccination, however. Many cattle died of blackleg before the advent of vaccination; this was one of the first cattle vaccines developed. Today the only blackleg vaccine available is a combination that includes protection against some of the other clostridi...