Symptoms of swine streptococcosis can be divided into four types

Swine streptococcosis is a zoonotic infectious disease caused by Streptococcus. Pigs can be infected at every growth stage, with piglets and finishing pigs being more commonly affected. The disease is more likely to become epidemic in warm, humid seasons, and is often transmitted through wounds, the respiratory tract or the digestive tract. Once it occurs, it can bring significant losses to a farm.

The acute septicemic type is the most common type. Affected pigs show a marked rise in body temperature, listlessness, and reduced or completely lost appetite, with reddened conjunctiva often accompanied by discharge. Some affected pigs show nasal discharge, coughing and difficulty breathing, and purplish-red patches may be visible on the skin. If not treated promptly, they often die within a short time.

The meningitis type is mostly seen in piglets. Affected pigs often show obvious neurological symptoms, such as circling, teeth grinding, frothing at the mouth, paddling movements of the limbs, unsteady walking and even falling down with convulsions. These pigs mostly show fever and refusal to eat in the early stage of the disease, after which the neurological abnormalities rapidly worsen, making this one of the more distinctive types of symptoms of the disease.

The arthritis type mainly manifests as swelling and pain in one or more joints. Affected pigs are lame and have difficulty walking, and in severe cases lie down and cannot get up, with a sensation of heat when the affected area is touched. There is also the lymph node abscess type, in which the lymph nodes under the jaw, in the pharyngeal region and elsewhere gradually swell and suppurate, with a longer course of disease and relatively mild systemic symptoms.

When suspected sick pigs are found during breeding, they should be isolated promptly to avoid contact with healthy pigs, and the pens and equipment should be thoroughly disinfected. Daily wound care, environmental cleanliness and feeding management can effectively reduce the risk of disease, and specific medication should be carried out under the guidance of a veterinarian.