The incidence of abomasum displacement in dairy cows increased with the expansion of an intensive feeding scale. The raising and high yield of dairy cows have been paid more and more attention. To improve the yield of dairy cattle, the input of concentrate on dairy cow feeding is increasing gradually. The relative imbalance of concentrate and crude ratio leads to a series of diseases of the forestomach and rump of dairy cows. Abdominal displacement occurs to varying degrees in cattle raised by large-scale cattle farms and individual farmers. Next, let's take a detailed look at the clinical symptoms of cow abomasum displacement. Comprehensive treatment of cow abomasum displacement.
1. Clinical symptom
Abdominal dislocation usually occurs after postpartum and may occur at the end of pregnancy in some cases. The left side of the abomasum is dislocated, and the symptoms of flaccidity of the anterior stomach often occur in the early stage of diseased cattle. The main symptoms are good or bad appetite, occasional rumination, normal rumination, and sometimes reduced rumination or stopped completely. In some cases of vomit and diarrhea, some cases of constipation symptoms and fecal output decrease significantly with the aggravation of symptoms. The left abdominal circumference will be significantly increased.
The sound of a steel pipe can be heard in combination with percussion and auscultation. Vibration sound can also be heard in the impact palpation. The puncture fluid at this place is taken to detect the pH value. If it is 1-4, the diagnosis can be confirmed. When the symptoms are obvious, even the abdominal circumference of the corresponding left ventral wall penultimate 1-4 ribs protrudes outwards, and the gown fossa collapses. The right side of the abomasum can be divided into two types: clockwise and counterclockwise torsion. Clockwise torsion is often acute, and the duration of the disease is short. The diseased cattle show abdominal pain symptoms of varying degrees in the initial stage.
The amount of defecation is reduced. With the aggravation of the symptoms, defecation will gradually stop, and the body will rapidly develop seriously. In dehydration, the right ventral circumference is increased, especially between the penultimate 1-4 intercostals. Combined with percussion and auscultation, steel pipe sounds can be heard. Vibrating water sounds can be heard by impact palpation. The pH value of the puncture fluid is 1-4. If there is a large amount of fluid accumulated in the rumen, the clinical symptoms of counterclockwise torsion are similar. On the left side of the abomasum, the difference is that the steel pipe sound is produced on the right abdominal wall, and the position is relatively forward, generally in the reciprocal 3-4 intercostal space.
2. Prevention and control measures
Drug reduction.
The diseased cattle first regulate the rumen pH value, then inhibit rumen fermentation; then lightly diarrhea and strengthen the stomach, accelerate rumen gas discharge; then close the abdominal cavity, alleviate intestinal spasm, promote rumen floating; finally, cattle breeders inject the appropriate amount of smooth muscle stimulant to restore the abomasum to its original position. The diseased cattle can be fed 100 g baking soda and 1000 g water first, 20 g active yeast, 300 g magnesium sulfate, 2000 mL water, intraperitoneal injection of 2000 ml saline, 100 mL procaine, and then intramuscular injection of 20 mL rack.
Rolling reduction method.
The diseased cattle should be fed with the appropriate amount of medicine before rolling. The diseased cattle can be given an intramuscular injection of 1-2 mL Jingsongling for general anesthesia and an intramuscular injection of 20 mL atropine for inhibiting salivary secretion. Then the diseased cattle were poured into the sand by double cramps. The hooves of the limbs were fixed on a 2-meter-long rafter. Then the assistant lifted the rafter to make its abdomen upward and swayed from side to side continuously.
At this time, the operator used a 20-cm-wide wooden board at the rump to push and squeeze it. After 15 minutes of shaking, the rafter made the animal sway. Its abdominal upward posture was still for 10 minutes, which prompted the abomasum gas to be discharged through the intestinal canal. The diseased cattle are usually rolled down four times and then intraperitoneally injected with 2000 mL0.25% procaine saline and 20 mL recline. It should be noted that when the diseased cattle are treated by the rolling method, they should fast for several days and control drinking water.
This is because the smaller the rumen volume, the better the therapeutic effect. Sick cattle swaying left and right in lying position can make rumen contents sink to the back continuously, and the abomasum accumulated a large amount of gas can rise to the ventral floor space during the swaying, and continue to move to the right side to reset.
Surgical treatment.
The main process is Baoding, cutting off the coat of the surgical department and sterilizing, then opening the surgical pathway, that is, cutting the skin, muscle, and peritoneum in turn, and taking appropriate treatment according to the actual situation. After the reduction and fixation of the abomasum, the surgical pathway is closed layer by layer, and then strengthening the post-operative nursing.
Clinically, there are three different surgical pathways. The first is the left surgical approach, which is the most commonly used method. Opening the incision under the left costal arch can ease the pressure of the abomasum and pull it back to the right abdominal cavity. It is also easier to deal with other situations besides the displacement of the abomasum. But it is difficult to fix the abomasum, especially when the body is large.
The second is the right surgical approach, that is, to make an incision at the slightly lower and anterior position of the right gown. This disease is easy to fix the abomasum, but it can not reduce the pressure of the abomasum, and it is difficult to pull it back to the right abdominal cavity, especially when adhesion occurs, it can not pull it back completely.
The third method is a bilateral approach, that is, to make an incision in the anterior and inferior part of the right gown and the middle part of the left gown. This method can make up for the shortcomings of unilateral operation, but to make two incisions will have a greater impact on the body, especially the weakened cows can not bear it at all, so it is not used in the clinic.
Five methods can be used for abomasum fixation, namely, left abdominal abomasum fixation, right peritoneum fixation, right median abdominal abomasum fixation, lasso needle abomasum fixation, and blind needle abomasum fixation. Paramedian abdominal incision through subcutaneous fixation of the abomasum is the latest method, which does not require abdominal wall muscle incision. It only takes 15 to 20 minutes for the operation, and the cost of treatment is low. That is, the diseased cattle were fixed in the dorsal lying posture. The position of the rump was determined by auscultation and percussion.
Then, the nonabsorbable needle with nylon material was inserted subcutaneously into the rump with a length of 12-14 cm and a curvature of 3/8 to make it fixed in the normal position. When adopting this method, it is necessary to ensure that the rump has been restored to the correct position when the cow is lying on the back. This method is simple but easy to cause peritonitis. The treatment and nursing of diseased cattle should be strengthened after the operation, and the proper amount of penicillin and streptomycin can be injected intramuscularly every day within 7 days after operation; if dehydration occurs, the intravenous fluid infusion can be adopted, and acid-base imbalance can be adjusted.
Oral rehydration salts are generally chosen and used daily. Also, a small amount of stomach-strengthening drugs, sodium bicarbonate and paraffin oil can be taken orally to promote the excretion of corrupt contents accumulated in the gastrointestinal tract, stimulate gastrointestinal peristalsis and improve digestive function system.