Porcine respiratory syndrome consists of a variety of causes, including viruses (blue ear, circovirus, pseudorabies, flu), bacteria (porcine plague, swine streptococcus, pig paratyphoid, Haemophilus parasuis), mycoplasma, environment It is caused by interactions such as feeding management, and is mostly caused by a mixed infection of two or more pathogens. In addition to causing direct death, the disease is more serious because of the obvious slow weight gain, increased consumption of materials, and long-term carrying of multiple pathogens, resulting in economic losses, becoming a prominent and very difficult disease prevention system in the pig industry. The problem. Stress is a major factor in the outbreak of erythroblastic disease. The sudden change in weather since the fall has caused great stress on the herd. This article analyzes a case of erythropoiesis caused by porcine respiratory syndrome for clinical pig production.
First, the appearance of the pigs sent to the test and the typical lesions of the necropsy

Figure 1 Sick pig skin bleeding point

Figure 2 sick pig mandibular bleeding point

Figure 3 sick pig eye lesions

Figure 4: jaundice around the cartilage

Figure 5: Abdominal cartilage around the jaundice, bleeding point

Figure 6 skin mucosal bleeding point

Figure 7 suffering from lung disease in pigs

Figure 8 shows the appearance of the pig stomach

Figure 9 suffering from internal lesions in the stomach of pigs

Figure 10 suffering from intestinal wall disease

Figure 11 suffering from porcine nephropathy

[NextPage]

Second, the cause analysis :

By observing the lesions, the following conclusions can be drawn: respiratory syndrome - secondary infection. The pig farm care pig health has not been put in place, leading to the occurrence of porcine respiratory syndrome, and stress stimulates pig erythropoiesis. Thereby causing oozing of the pores of the skin and poor blood coagulation.

Third, blood smear microscopy:

During the necropsy, take a drop of blood, dilute it with physiological saline 10 times, mix it, and add a cover microscope to observe 400-600 times. It can be seen on the surface of red blood cells and all kinds of worms swimming in the plasma, attached to the surface of red blood cells. Most of the worms are surrounded by a circle and arranged in a chain. Red blood cells are star-shaped or irregular polygons.

Figure 12 blood microscopy results

Figure 13 blood microscopy results

Fourth, the emergency treatment of pig farms:

Sick pigs are injected with long-acting oxytetracycline to control secondary infection of Eperythrozoon. Jiuding "Dingtai" 1kg + doxycycline 1200g + Vitocon 10g + glucose sugar 500g per ton of feed. Three days later, blood was supplemented with iron dextran once. For patients with eyelid edema, pigs are injected with furosemide. After two weeks of returning visits, I learned that the condition of the farm was basically stable and the trust and praise of the farmers were obtained.

V. Prevention and control measures:

Because respiratory syndrome is a multi-factorial disease, which causes the complexity of the disease, a single prevention and treatment measure can not achieve the desired results, and comprehensive prevention and control measures such as vaccines, drugs, and feeding management must be taken.

1. Immunization prevention: In order to obtain a reliable immune effect, we recommend “vaccination of viral diseases and health care of bacterial diseases”. For several serious viral diseases: blue ear, swine fever, pseudorabies, foot and mouth disease, etc., vaccine immunization must be done, and immune effects should be assessed by laboratory antibody monitoring. In order to avoid immunosuppression to cause immunosuppression in pigs, it is recommended that bacterial diseases be prevented and controlled with strict drug health measures.

2, drug prevention: the disease is important in prevention. Piglets use “Jiuding 20% ​​tilmicosin premix” 8mg/kg, which can effectively prevent respiratory syndrome and improve feed intake and weight gain. Large pigs add 400 mg/kg to control respiratory syndrome associated with blue ear disease. In addition, when the piglets are weaned, transferred to the group, have sudden changes in climate or have other stress factors, it is easy to cause the disease. Pay attention to adding “Vidokang”.

3. Feeding management and environmental control

Adhere to self-support and self-support, all in and out. According to different feeding stages of pigs, Jiuding feed with comprehensive nutrition is used to ensure the development and function of the immune system, and at the same time enhance immune function and disease resistance. Do a good job of disinfection, cold protection, warm ventilation, and create a comfortable, dry, quiet and clean living environment for the pigs.