{"id":9027,"date":"2024-08-08T09:10:16","date_gmt":"2024-08-08T02:10:16","guid":{"rendered":"https:\/\/vinavetco.com\/thong-tin\/streptococcal-infection"},"modified":"2024-08-08T09:10:16","modified_gmt":"2024-08-08T02:10:16","slug":"streptococcal-infection","status":"publish","type":"thong-tin","link":"https:\/\/vinavetco.com\/en\/technical\/streptococcal-infection","title":{"rendered":"STREPTOCOCCAL INFECTION"},"content":{"rendered":"

Disease Agent<\/strong><\/span>
\nStreptococcal disease in pigs, also known as Streptococcus infection, is caused by Streptococcus suis, a bacterium commonly found in pigs worldwide. This bacterium resides in the tonsils and does not typically cause illness under normal conditions.<\/em><\/span><\/p>\n

However, under adverse conditions such as stress, the bacterium can cause various diseases in the host, including meningitis, pneumonia, “thin pig syndrome,” arthritis, endocarditis, myocarditis, pericarditis, polyserositis, and abortion. Streptococcal infection is a secondary disease that prevails in cases of Porcine Reproductive and Respiratory Syndrome (PRRS), leading to significant losses in the livestock industry.<\/span><\/p>\n

In addition to causing pig deaths, the disease can lead to meningitis, deafness, and multi-organ failure, which can be fatal to humans (through consumption of undercooked pork, such as blood pudding or rare pork dishes).<\/span><\/p>\n

A dangerous source of the pathogen is the pig’s drinking water, including water from wells drilled 30-40 meters deep.<\/span><\/p>\n

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Humans contract Streptococcus from pigs<\/em><\/span><\/p>\n

Symptoms<\/strong><\/span><\/p>\n

Pigs of all ages can be infected with Streptococcus bacteria, but newborn piglets and weaned pigs are most commonly affected. The incubation period ranges from 1 to 2 days, and can sometimes be as long as 7 days.<\/span><\/p>\n

In acute cases, pigs can die very quickly. Infected pigs may exhibit very high fever, loss of appetite, lethargy, disorientation, and weakness. Some may show neurological symptoms such as loss of balance, sitting posture similar to a “sitting dog,” unsteady walking, arching of the back, trembling, and convulsions. Others may become blind, deaf, walk with a limp, or become crippled. Arthritis can occur in chronic cases.<\/span><\/p>\n

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Lesions:<\/strong><\/span><\/p>\n

In pigs that die from acute or subacute forms of the disease, post-mortem examination reveals significant hemorrhage in serosal and mucosal surfaces. In cases of meningitis, there is swelling, blood accumulation in the brain and meninges, and an increase in opaque cerebrospinal fluid. In cases of septicemia, the carcass appears red, with swollen organs and lymph nodes. There may be fibrinous pericarditis and proliferative inflammation of the left ventricular valve. In cases of polyarthritis, pus may be present. The carcass may exhibit bleeding from the mouth, nose, and a tendency for blood to clot poorly.<\/span><\/p>\n

Blood accumulates in the thoracic and abdominal cavities, with fibrinous exudates covering the pleura, pericardium, omentum, and liver surface. The apical and cardiac lobes of the lungs may become consolidated, sometimes with hemorrhagic areas and caseous inflammation. The spleen is swollen and dark red, with a tense capsule and rounded edges. Under the splenic capsule, there may be pinpoint or patchy hemorrhages. The spleen appears firm and rubbery to the touch.<\/span><\/p>\n

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Streptococcal Disease in Pigs<\/em><\/span><\/p>\n

Diagnosis:<\/strong><\/span><\/p>\n

Diagnosis is based on clinical symptoms, epidemiological investigation results, and examination of tissue samples, blood, inflammatory exudates, or joint fluids.<\/span><\/p>\n

Differential Diagnosis:<\/strong><\/span><\/p>\n

It is important to differentiate from other diseases such as:<\/span><\/p>\n