Recently, Xiaobian experienced a case of parasites in newborn 1-3 months old nursing calves, which is called calf new ascariasis (also called cattle toxicosis), which is mainly parasitic in the small intestines of newborn calves, and is also a common parasitic parasite commonly parasitic in newborn calves.
<h1>pathogen</h1>
When cattle swallow forage contaminated with infected eggs or drink water, the larvae escape from the small intestine, pass through the intestinal wall and migrate to organ tissues such as liver, lungs, kidneys, etc., and undergo a second metamorphosis into tertiary larvae, where they remain in these tissues. When the cow is about 8.5 months pregnant, the larva moves to the uterus into the placental amniotic fluid, undergoes a third molt, and becomes a fourth stage larvae, which is swallowed by the calf and developed in the intestine. Calves grow up after the fourth molt after birth, and after 25-31 days become adults, adults can live in the small intestine for 2-5 months and then gradually excrete. Infected eggs can also infect calves with milk, mainly in calves under 5 months of age, with adult worms in the intestines of calves aged 2 weeks to 4 months. In adult cattle , only migratory larvae are found in the internal organ tissues , and adult parasites have not yet been seen.
<h1>symptoms</h1>
Toxocaria is divided into two cases: fetal belt infection and in vitro infection.
When the fetal belt is infected, the affected cattle are coarsely hairy, the body temperature is normal, the conjunctiva of the eyes is pale; the appetite is weak, the abdomen is swollen, the gray and white feces are discharged, sometimes mixed with blood, and there is a special smelly odor; the sick cattle are emaciated, the hip muscles are relaxed, the hind limbs are weak, and the standing is unstable. If the insect body is too much, it forms intestinal obstruction, and there is hernia pain.
Calves infected with roundworm toxoplasma gondii in vitro cause coughing as the larva migrates to the lungs and bronchi. If the larvae grow in the lungs, they also have difficulty breathing due to pneumonia, and the mouth has a special odor. In general, it is difficult to see eggs in calf manure at 16-30 days old and above, and eggs are detected in calves aged 1-5 months.
Calves within 6 months of age are prone to the disease, and the main symptoms of sick cattle are gray and white thin feces, sometimes mixed with blood, a special smelly odor, weakness of the hind limbs, coarse hair, and pale conjunctiva of the eyes. If there are many insects, there is abdominal pain in the formation of obstruction, and the body temperature is not high. If it is a calf infected after birth, there are also symptoms of coughing. Eggs are detected in 1-5 months of age calves.
<h1>treat</h1>
❶Propylthiobendazole 10 mg/kg or levamisole 7 mg/kg, taken once. Levamisole injection of 5 mg/kg can also be used intramuscularly.
❷ Symptomatic therapy: Conditioning gastrointestinal function to enhance the body's resistance, can be intramuscular injection of 2.5% vitamin Bl10 ml, 10% vitamin C 20 ml and flumetsone (5 mg / stick) 6 ml, etc. Bacteriostatic and anti-inflammatory drugs can be used with sulfonamides, chloramphenicol, penicillin, streptomycin and other bactericidal and anti-inflammatory drugs. Supplemental body fluids to relieve acidosis can be intravenously injected with compound sodium chloride injection 1000 ml, 10% glucose 100 ml, 5% sodium bicarbonate injection 500 ml. Cardiac diuretic treatment can be intravenous or intramuscular with 10% anacinol coffee injection 10 ml. Calves with significant abdominal pain symptoms can be injected intramuscularly with 30% metamine 10 ml or aminopyrine injection 20 ml.
(1) According to clinical practice, the combination of avermectin and albendazole tablets has a good effect on the deworming effect of calf neocariasis
(2) After deworming, laxatives can be taken, which is conducive to excreting insects and removing spoilage from the gastrointestinal tract. Severe patients should be detoxified and treated symptomatically to obtain better results.
(3) This disease can not be treated as acute gastroenteritis, but it is necessary to consider the damage to the intestinal mucosa due to too many insects in the treatment, so it is necessary to give intestinal antibacterial and anti-inflammatory drugs.
(4) Because the function of the calf digestive system is not perfect, it is necessary to avoid a large number of proprietary Chinese medicines, and can choose proprietary Chinese medicine tablets.
(5) When calf roundworm larvae are transferred to the lungs, they will destroy the lung tissue and cause pneumonia, so there are clinical symptoms of cough and asthma. Ascending adult worms can lead to obstruction of the bile ducts, causing disorders of bile metabolism, making treatment very difficult. The activity of the insect body produces a large number of toxic substances, which can cause poisoning in the body, trigger neurological symptoms, and aggravate the disease. Therefore, early detection, accurate diagnosis, and timely treatment are essential.
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