◎ Symptoms: High fever, cyanosis (purple skin patches), internal bleeding, sudden death.
◎ Control: Strict biosecurity measures, culling of infected herds.
◎ Symptoms: High fever, diarrhea, neurological signs, skin hemorrhages, high mortality.
◎ Control: Vaccination (e.g., lapinized live vaccine).
◎ Symptoms: Abortion in sows, stillbirths, respiratory distress in piglets, cyanotic ears.
◎ Control: Vaccination + biosecurity.
◎ Pathogen: Erysipelothrix rhusiopathiae.
◎ Symptoms: Acute septicemia (diamond-shaped skin lesions), arthritis, endocarditis.
◎ Control: Penicillin treatment, vaccination.
◎ Pathogen: Streptococcus suis (e.g., serotype 2).
◎ Symptoms: Meningitis (circling, convulsions), arthritis, septicemia.
◎ Control: Antibiotics (e.g., cephalosporins) + vaccination.
◎ Symptoms: Fibrinous pleuritis, pericarditis (labored breathing, wasting).
◎ Control: Early treatment with florfenicol or enrofloxacin.
◎ Symptoms: Wasting in piglets, coughing (larval migration), intestinal blockage.
◎ Control: Ivermectin deworming.
◎ Symptoms: Intense itching, crusting, thickened skin (common on ears and back).
◎ Control: Topical acaricides (e.g., amitraz) + environmental disinfection.
◎ Pathogen: Toxoplasma gondii (zoonotic).
◎ Symptoms: High fever, labored breathing, abortion.
◎ Control: Sulfonamide treatment.
◎ Symptoms: Severe watery diarrhea, vomiting, high mortality in piglets.
◎ Control: Vaccination + feedback (high-risk, use with caution).
E.g., iron-deficiency anemia (pale piglets), vitamin E/selenium deficiency (white muscle disease).
◎ E.g., transport stress (PSE meat), malignant hyperthermia (certain breeds).
◎ Symptoms: Blisters and ulcers in the mouth and hooves, lameness, sudden death in piglets due to myocarditis.
◎ Control: Vaccination (serotype-specific).
◎ Control: Vaccination with gene-deleted vaccines.
◎ Control: Vaccination + stress reduction.
◎ Symptoms: Chronic dry cough, stunted growth, "pinkish" lung lesions.
◎ Control: Vaccination + tiamulin/other antibiotics.
◎ Symptoms: Yellow diarrhea (1-3 days old), white scours (10-30 days old), watery diarrhea.
◎ Control: Sow vaccination + oral antibiotics (e.g., enrofloxacin).