كتاب 22 injuriesdiseasecalving93

22 injuriesdiseasecalving93 من كتب طب بيطرى Animal Care and Health Maintenance 1993 1 INJURIES AND DISEASES OF BEEF CA TTLE ASSO- CIA TED WITH CAL VING S. P. Cuneo, 1 DVM; C. S. Card, 2, 3 DVM, PhD; E. J. Bicknell, 2, 3 DVM PhD The pay-off for cow-calf producers is being able to sell a weaned calf. To get this calf to market you must first get your cow pregnant and have her deliver a live calf. There are several common prob- lems that affect cows from late preg- nancy through calving.Many of these problems that occur during calving have a rapid onset and require a rapid re- sponse, the good news is that if they are attended to early they often have no permanent effect on subsequent breed- ing. This publication will present common reproductive problems affecting beef cattle, a short description, underlying causes and possible prevention and common treatment. These problems are presented generally in chronological order, from those conditions seen before calving starts, through the immediate post-calving interval. 1. PROBLEMS PRE-CALVING: vaginal/rectal prolapse ketosi s 2. PROBLEMS AT CALVING: dystocia bruises, laceration, rupture uterine prolapse milk fever obturator paralysis/downer cow retained placenta grass tetany 1. PRE-CALVING: Vaginal/Rectal Prolapse Vaginal/Rectal Prolapse Vaginal/Rectal Prolapse Causes The tissue around the birth canal becomes relaxed as the cow starts the last third of gestation, increased pressure in the abdominal cavity will push the vagina or the rectum out. If the tissue is trapped outside the birth canal it will swell and may become in- fected. In some cases the bladder is also trapped and the animal is unable to urinate. This condition is more common in older cows but may occur in first calf heifers. There may be a genetic link. Overly fat cattle and cattle on pasture with a high legume concentration are at higher risk. Treatment Epidural anesthetic is usually necessary. Replace the tissue and suture in place. Vaginal sutures must be removed before calving. Prevention Remove animals from the herd that develop this condition, don’t keep animals that have pre-calving prolapses. Don’t allow cows to gain too much weight during the last trimester of pregnancy. Animal Care and Health Maintenance 1993 1 INJURIES AND DISEASES OF BEEF CA TTLE ASSO- CIA TED WITH CAL VING
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