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.
This is an English surname of confused origins. Recorded as Garstan, Gerston, Jerson, Youson, Yorston, Yorkston and others, it is locational and a dialectal development of the ancient Lancashire town name Garstang. The origin is pre 8th century Norse-Viking word geirr meaning spear or spear head, and ston, - a pole.