The cause is due to the processing of fine roughage and the production and processing of various cakes, mash, slag and slag. The various metal parts of the masher are in the process of processing, and the metal parts of the sifter, the hammer and the like are in contact with the feed. Metal materials or residues are accidentally dropped into the feed when the metal material is dropped or repaired, and the cows eat quickly, do not chew, wrap the food into saliva, swallow, and have a habit of eating, often Metal foreign matter mixed in the feed swallows and falls into the stomach of the net, causing the disease to occur. Therefore, in the case of improper feeding and management, the feed processing is too extensive, and the condition of the disease is inadvertent, the incidence of the disease will be high.
High-yielding dairy cows have a strong appetite and fast feeding. It is easy to swallow metal foreign objects, enter the rumen with the feed, and enter the net stomach along with the contents. In this case, if the intra-abdominal pressure is sharply increased, it will cause the metal foreign body to puncture the net stomach. Therefore, the intra-abdominal pressure is usually increased during the rumen accumulation or swelling, pregnancy, childbirth, slipping, surgical fixation, and the like. This leads to the occurrence and development of this disease. Among them, needles, nails, broken wires and other sharp foreign bodies are the most harmful, which not only causes serious damage to the net stomach, but also damages adjacent tissues and organs, causing acute pathology. process.
Symptoms The diseased cows eat metal foreign bodies swallowed with the feed, without any clinical symptoms before they penetrate the stomach wall. Foreign bodies that usually remain in the stomach of the net, suddenly appear clinical symptoms when the labor pain, rumen food and other factors that cause increased intra-abdominal pressure.
At the beginning of the disease, the stomach is usually flaccid, the appetite is diminished, and sometimes there is a eclipse, the rumen contractility is weakened, and it is relaxed due to inhibition, and it is constantly suffocating, often showing intermittent rumen bloating. Intestinal peristalsis is weakened, sometimes intractable constipation, late squatting, fecal stench, and reduced milk production. Due to the pain in the stomach of the net, the sick cow sometimes suddenly becomes uneasy. The condition gradually increased and the metal stomach and the peritoneum or pleura were damaged by metal foreign bodies, showing various abnormal clinical symptoms.
Poor posture
When standing, often take the position of high front and low back, the head and neck are stretched, the eyes are half closed, the elbow joint is outward, arched, and unwilling to move.
2. Abnormal movement
When walking a sick cow, he is afraid of going up and down, and stops when walking on masonry or cement road.
3. Lying abnormal
When lying down, standing up, because of the pain, very cautious, elbow muscles are turned, even licking and grinding.
4. Percussion abnormalities
The stomach area of ​​the percussion network, that is, the left posterior abdominal wall of the sword-shaped cartilage, the sick cow feels pain, showing uneasiness, paralysis, avoidance or concession.
5. Antispasmodic swallowing abnormalities
In some cases, the rumbling is slow, and it is difficult to vomit the food group in the stomach to the mouth, and the swallowing action often has special performances. The face is sad, and it is unnatural to shrink the neck and stop when swallowing.
6. Whole body function status
Body temperature, respiration, and pulse did not change significantly in the general case, but after the perforation of the net stomach, the body temperature may rise to above 40 °C in the first few days, and then to normal temperature, to a chronic process, no god, weakness, indigestion, condition Sometimes it gets better, sometimes worsens, and gradually loses weight.
Diagnosis Because the clinical features of this disease are not prominent, the general cases have refractory digestive dysfunction and are easily confused with other diseases of the gastrointestinal tract. Only repeated clinical examination, combined with medical history for analysis and analysis, comprehensive judgment, in order to confirm the diagnosis.
The diagnosis of this disease should be based on the situation of feed management and the development of the disease. Abnormal posture and movement, intractable anterior stomach flaccid, gradually losing weight, painful palpation in the stomach area, and long-term treatment, but also the basic symptoms of this disease.
In the treatment of traumatic reticular stomach peritonitis, if there is no complication in the early stage, surgical treatment is performed, rumen incision is performed, metal foreign bodies are removed from the stomach wall of the net, and nursing measures are strengthened.
Conservative therapy will set the diseased cow on a slope or on a sloping platform, keeping the position of the high-back hindquarters low, reducing the pressure on the stomach of the abdominal organs and causing the foreign body to withdraw from the stomach wall. 4 million units of penicillin and 3 million units of streptomycin, respectively, intramuscular injection, continuous medication for 3 days, can also be put into the net stomach by special magnets, sucking metal foreign bodies in the stomach, while intramuscular injection of streptomycin, the effect is better.
Strengthen feeding and nursing, make the sick cow quiet, first hunger for 1-2 days, then give digestible feed, of course, supplement 5% sugar saline, hypertonic glucose or calcium gluconate solution during the period, intravenous injection, can improve the therapeutic effect .
Prevention is first of all to strengthen the daily feeding management work, pay attention to feed selection and conditioning, and prevent mixed metal foreign matter in the feed. Secondly, when repairing the barn and related tools, it is necessary to promptly pick up metal nails such as nails and broken wires on the ground. From the beginning, strengthen the management of feeding; third, when processing feed, it is better to add an electromagnetic device to remove metal foreign matter, to remove foreign matter in feed and forage to prevent the occurrence of this disease; Fourth, the acquisition of wild hay must be strictly controlled. For some wild hay, there are more impurities, such as small bamboo pieces, iron wire, metal foreign objects, etc., and now cows in the pasture eat more wild hay, so this aspect should pay more attention; fifth, regular inspection, timely treatment.
If there is iron in the stomach of the cow, it can be taken out by placing the iron in the stomach of the cow. If the iron can not be taken out by the iron remover, a magnetic tube can be placed in the stomach of the cow to absorb the residual iron in the stomach of the cow. For cows with traumatic network gastritis, it is necessary to timely take iron, and the cows that cause traumatic pericarditis should be eliminated in time to avoid further losses.
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