In pig farming, diseases such as swine paratyphoid are always a major concern for farmers because of their rapid spread and high mortality rate. When pigs show symptoms, timely identification and response are crucial. Let Vemedim help you learn in detail about the warning signs, how to handle the disease, and effective preventive measures so your herd stays healthy right away.
Causes of swine paratyphoid
Paratyphoid is caused by two strains of bacteria, Salmonella choleraesuis and Salmonella typhimurium. These are gram-negative bacteria that spread easily through the digestive tract, especially when pigs consume feed, drinking water, or come into contact with waste containing pathogens.
The disease can occur at any age; however, piglets from weaning to around 4 months old are the most susceptible group because their immune systems are not yet fully developed. The bacteria invade through the intestinal mucosa, then spread into the bloodstream and other organs such as the liver, spleen, and kidneys, causing septicemia and systemic damage.
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Symptoms of swine paratyphoid
After infection for 2-7 days, pigs begin to show clear clinical signs. The disease usually progresses in two main forms: acute and chronic, with different symptoms as follows:
Acute form
Usually occurring in piglets or newly weaned pigs, the disease starts and progresses rapidly and can cause death within 2-4 days after onset, with a mortality rate of nearly 100% if untreated. Affected pigs will show symptoms such as:
- High fever of 41.5-43°C.
- Pigs are lethargic, lose appetite, and lie in one place.
- Digestive symptoms appear: constipation in the early stage, then progressing to severe diarrhea with yellow, blood-tinged, foul-smelling stools.
- Sick pigs squeal due to abdominal pain, may vomit, have difficulty breathing, nasal discharge, and drooling.
- Toward the end of the stage, hemorrhagic spots or bluish-purple patches appear on the ears, abdomen, and inner thighs due to bacterial destruction of blood vessels.
Chronic form
Occurs in adult pigs or fattening pigs, with the disease lasting 2-4 weeks. The symptoms are milder but prolonged. They include:
- Pigs still have a fever of 39-40°C.
- Pigs eat poorly, grow slowly, have rough coats, are thin and weak, and sometimes have mild respiratory disorders such as rapid breathing and a slight cough.
- Prolonged diarrhea, with yellow or black stools and a strong foul odor.
- The chronic form often causes stunted growth and reduced weight gain, resulting in significant economic losses even though the death rate is not high.
How to prevent swine paratyphoid
Because the disease spreads through the digestive tract and can persist in the environment for a long time, prevention is always more effective than treatment. Measures should be implemented consistently and regularly, including:
- Strict biosecurity: The pig house must be dry, clean, and stocked at a moderate density. Do not allow pigs to eat spoiled feed, drink dirty water, or come into contact with untreated feces or waste.
- Periodic disinfection: Use disinfectant solutions containing iodine, chlorine, or ammonium compounds such as Vemedim Altacid to spray 1-2 times per week in the livestock area.
- Vaccination with Amolax: Vaccinate on schedule, especially for weaned piglets, to create active immunity.
- Supplement digestive enzymes, vitamins, and minerals with Vemedim AD3E, Vemedim Anagin C, Vemedim Aminovit: Helps boost resistance, stabilize the gut microbiota, and reduce bacterial infection.
- Use preventive antibiotics appropriately: When the risk is high, a low dose of broad-spectrum antibiotics may be mixed into feed for 5-7 days, but veterinary instructions must be followed to avoid antibiotic resistance.
Most effective treatment regimen for swine paratyphoid
When signs of disease are detected in the herd, the sick pigs must be isolated immediately and the entire barn disinfected daily. Below are treatment regimens corresponding to each case:
Regimen 1: For piglets or acute cases
- Antibiotics: Inject fluoroquinolone active ingredients (enrofloxacin or norfloxacin) at a dose of 5-10 mg/kg body weight, and may be repeated after 72 hours if the disease is severe.
- Digestive support: Mix digestive enzymes or toxin-adsorbing products into feed, use continuously for 3-5 days to stabilize the intestines.
- Boost resistance: Inject glucose - vitamin C - multivitamins - B-complex vitamins for 3-5 days to help rapid recovery.
Regimen 2: For fattening pigs or chronic cases
- Antibiotics: Use amoxicillin or trimethoprim - sulfamethoxazole, injected or mixed into feed for 5 consecutive days.
- Supportive care: Provide clean water, easily digestible feed, maintain stable barn temperature, and avoid stress.
- Nutritional supplementation: Use live probiotics, vitamin C, and electrolytes Vemedim Electrosol continuously to restore liver and intestinal function.
Regimen 3: For herds at risk of widespread transmission
- Combined broad-spectrum antibiotics: Tetracycline or newer-generation chloramphenicol may be combined (according to veterinary guidance).
- Supportive treatment: Use oral rehydration and electrolyte solutions (ORS), combined with antipyretic and anti-inflammatory medication Vemedim Analgindex.
- Prevent recurrence: After treatment, continue supplementing lactic enzymes and vitamins in the diet for at least 7-10 days to prevent reinfection.
Swine paratyphoid is one of the causes of serious economic losses in livestock production. Because the disease spreads quickly and has a high mortality rate, farmers need to focus on preventive measures, early diagnosis, timely isolation, and proper treatment when sick pigs are detected to protect the herd. Vemedim is always ready to accompany you in protecting and caring for your herd; please contact us if you need support.
