Spontaneous poisoning by Cestrum intermedium in dairy cattle

The pathology of Cestrum laevigatum (Schlechtd.) poisoning in cattle.

The clinical features and pathological findings of 6 steers drenched with dried plant material of Cestrum laevigatum are described. Doses ranging from 0.5 to 10 g/kg/day were given intraruminally for 1 to 38 days. Animals that received 5 to 10 g/kg/day showed nervous signs including ataxia, muscle tremors, hypersensitivity and intermittent chewing. Clinical signs in the steers which received 0,...

Experimentally-induced Cestrum laevigatum (Schlechtd.) poisoning in sheep.

Dried, milled Cestrum laevigatum plant material was drenched to 6 ewes at doses ranging from 2,5 to 10 g/kg/day for 1 to 47 days. The most noticeable clinical signs were depression, anorexia and ruminal stasis. These signs were accompanied by clinical pathological changes indicative of liver involvement such as increases in the serum activities of aspartate transaminase, lactate dehydrogenase a...

Acorn poisoning in cattle.

Ten cows in a suckler herd totalling 60 sickened after grazing parkland which was heavily covered with acorns. Two died. The main clinical signs were dullness, anorexia and constipation. The main pathological findings were severe nephrosis and some intestinal ulceration. After removal to an acorn-free pasture, the remaining eight animals made a full recovery.

Neosporosis in dairy cattle.

Inbreeding in Dairy Cattle

Inbreeding is defined as half of the genetic relationship between an animal’s parents. For example, the offspring from a mating of animals A and B, which have the same father, will have 12.5 percent inbreeding, because the genetic relationship between A and B is 25 percent. Statistical methods to select the best sires of each generation have been developed, making it feasible to achieve any pos...