Symptoms and Control Methods of Corydellosis of Swine
Release time:
Aug 15,2018
Corynebacterium causes inflammation of the pig's urinary system. The symptoms are purulent secretions from the sow's vulva and hematuria from time to time. according to the study80%The above boar foreskin with porcine Corynebacterium and sow vagina is rare. However, coryneosis occurs only in sows and is often found after breeding or after parturition.1To3Weeks of symptoms, so it is likely to be caused by infection of the urethral orifice during mating. Breeding boars, especially strong foreign breeds of boars, are cleaned regularly before mating or before prepuce and prepuce diverticulum to prevent transmission of germs to sows. Boar infected sows should arouse the attention of farmers.
1. pathogen characteristics
The causative agents of coryneobacteriosis are Corynebacterium renicum and Corynebacterium suis in the genus Corynebacterium. Corynebacterium kidney is also known as kidney bacillus, bovine pyelonephritis bacillus. Corynebacterium is a short, thick rod, with one end often thicker than the other. Corynebacterium nephritis mainly causes pyelonephritis in cattle and pigs, and is also pathogenic to horses, sheep and goats. Corynebacterium porcine usually has a variety of morphology, short approximate spherical and long one or both ends of the swollen rod-like, often in a single or clustered arrangement. Corynebacterium has no flagella, no movement, and no spores, which can cause pyelonephritis, cystitis and urethritis in pigs.
2. Epidemiology
Corynebacterium porcine generally exists in the foreskin of the boar, approximately80%The virus is rarely seen in the vagina of sows, but the disease mainly occurs in sows and symptoms usually appear a few days after mating. Therefore, it is generally believed that sows are infected by urethral abrasions during mating. Only pigs are susceptible to this bacterium in all livestock.
3. clinical symptoms
Mild sick pigs only have purulent secretions from the vulva and discharge hematuria from time to time, but no other symptoms. Serious sick pigs frequently discharge urine containing pus and blood, and the vulva and tail are often stained with dirty dirt. Sick pigs lose appetite, feel thirsty, drink a lot of water and gradually lose weight.
4. pathological changes
The lesions are mainly seen in the urethra and bladder of pigs, and in some cases can also involve the ureter, renal pelvis and kidney. Intravesical urine appears red with blood clots, cellulose, pus, and mucous necrotic debris. Bladder mucosal disease has only small, diffuse flushing areas at the beginning, and most or all hemorrhagic changes and fibrinous purulent inflammation occur at the later stage. Ureteral wave in time to appear swelling, thickening, hardening, thickening of the wall of the phenomenon, the same inflammatory changes with the bladder mucosa. When the renal parenchyma is invaded, there are changes such as degeneration and necrosis, and there are yellow bands, yellow nodules or diffuse yellow lesions on the surface of the kidney.
5. prevention and treatment
In order to prevent the spread of pathogens to the sick sows to be isolated treatment, decisive elimination of suspected source of infection of the boar, the use of artificial insemination can reduce or eliminate the occurrence of the disease. Clinical use of penicillin and broad-spectrum antibiotics can achieve good therapeutic effect, the use of intramuscular injection or mixing feeding can be.The specific treatment method is to inject penicillin and hemostatic sensitivity to the sick pigs,2times/day3days; intervals2Days later, double dose of enrofloxacin injection for intramuscular injection3Day. After the above treatment of general disease pig3The symptoms of hematuria disappeared and the frequency of urination decreased.5Days can return to normal.
Sows infected with the disease will inevitably affect the next estrus and mating, the farm will reduce the economic benefits, so farmers can use artificial insemination to prevent or reduce the occurrence of this disease.
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