Blackleg seldom affects cattle older than 2 years of age, most likely due to immunity induced by vaccines or natural exposure. However, sporadic cases do occur in cattle older than 2 years and are often associated with the reuse of needles for multiple injections.lackleg seldom affects cattle older than 2 years of age, most likely due to immunity induced by vaccines or natural exposure. However, sporadic cases do occur in cattle older than 2 years and are often associated with the reuse of needles for multiple injections.
Afton: a river in Scotland, for my nature theme. Afton: a Swedish word that means afternoon or evening, for Bjorkâs Scandinavian feel. Afton: a name ending with an ân,â for my weird enjoyment of names ending with ânâ. And âSweet Aftonâ, one of our favorite songs.
Sponsored Topics. Afton is a city in Union County, Iowa, United States. The population was 917 at the 2000 census. Afton is located at 41Â°1â²41â³N 94Â°11â²49â³W / 41.02806Â°N 94.19694Â°W / 41.02806; -94.19694 (41.027926, -94.197071). According to the United States Census Bureau, the city has a total area of 1.0 square miles (2.5 kmÂ²), all of it land.