Journal of the Department of Agriculture, Western Australia, Series 3

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"Swelled Head" in rams


Western Australia, Rams, Swelled head, Big head, Merinos, Dorset Horns, Clostridium oedematiens, Black disease vaccine

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During the summer and autumn months a disease of rams, popularly known as "swelled head" or "big-head" is encountered from time to time in Western Australian flocks. The condition is almost entirely confined to rams of the horned breeds and outbreaks which have come under notice in this State have occurred only among Merinos and Dorset Horns. Young rams and weaners are most frequently affected and the disease results from the infection of wounds about the forehead sustained by the animals when fighting.