PPDS And Mastitis In Sows: Prevention And Treatment

Postpartum dysgalactia syndrome (PPDS) and mastitis represent critical challenges in swine production, affecting sow health and piglet viability shortly after farrowing. These conditions lead to reduced milk production, inflammation, and increased mortality, resulting in substantial economic losses estimated at €300–€470 per case due to treatment costs and reduced litter performance.

Understanding the Core Conditions

PPDS encompasses a range of disorders including agalactia, mastitis, metritis, and fever, typically emerging within 24-48 hours post-farrowing. Mastitis, a key component, involves udder inflammation often caused by bacterial invasion, leading to painful swelling and diminished milk yield. Affected sows exhibit systemic signs like anorexia and lethargy, while piglets suffer from starvation and higher pre-weaning mortality.

Research highlights behavioral shifts in sows: pre-farrowing activity, including nesting, decreases postpartum, with PPDS-positive sows showing even less nest-building (p=0.04 during farrowing, p=0.0004 after), complicating early diagnosis as passivity mimics normal behavior.

Key Clinical Signs and Diagnosis

Early identification is vital. Look for:

• Apathy and inappetence in sows.
• Coprostasis (constipation) and vaginal discharge.
• Udder changes: reddening, edema, or agalactia.
• Piglet indicators: weak suckling, hypothermia, or high mortality.
• Fever, though not always reliable as it can be physiological postpartum.

Diagnosis relies on a holistic assessment rather than single symptoms. Piglet evaluation and temperature checks aid confirmation, avoiding antibiotic overuse. Studies confirm intramammary infections from low doses of bacteria like Escherichia coli (<100 CFU) trigger mastitis via endogenous or ascending routes.

Risk Factors Driving PPDS Occurrence

Farms with subclinical PPDS see elevated piglet losses, underscoring multifactorial origins involving nutrition, housing, and hygiene.

Effective Treatment Protocols

Treatment targets inflammation, infection, and milk restoration. Non-steroidal anti-inflammatory drugs (NSAIDs) like ketoprofen (3 mg/kg IM) or flunixin (2.2 mg/kg) provide analgesia, reduce endotoxemia, and lower weaning mortality in both healthy and affected litters. They comprise one-third of costs, with antibiotics dominating the rest.

Antimicrobials (e.g., benzyl procaine penicillin 10,000 IU/kg or trimethoprim-sulfadiazine 16 mg/kg) are reserved for systemic signs like fever and prostration, selected based on likely pathogens. Oxytocin (5-10 IU IV, repeated 2-3 hourly up to 4-5 times) stimulates letdown, with 5 IU minimizing side effects; allow 30-minute intervals.

Prostaglandins post-farrowing (24 hours) aid uterine involution, boost prolactin, and prevent endometritis. Meloxicam (0.4 mg/kg) combined with antibiotics has been used effectively in field studies.

Prevention Through Farm Management

Long-term control emphasizes environment and nutrition over reactive treatments. Key strategies include:

• Hygiene Protocols: Wash sows pre-farrowing entry; maintain high standards during parturition.
• Feeding Adjustments: Prepartal transition feeds high in fiber reduce PPDS; provide roughage for constipation prevention and nesting.
• Housing Optimizations: Allow space for movement and nesting materials like straw to shorten farrowing, cut stillbirths, and lower stress.
• Risk Sow Monitoring: Primiparous sows and those with long labors need extra care; assist dystocia hygienically.
• NSAID Prophylaxis: Early postpartum ketoprofen reduces subclinical PPDS mortality.

Studies affirm transition feeds and fiber sources significantly curb prevalence.

Economic and Productivity Impacts

PPDS inflates fixed sow costs by €279 and totals €300–€470 per incident, driven by antibiotics, NSAIDs, and litter losses. Modeling highlights PPDS and locomotory issues as top cost drivers in sows. Piglets bear the brunt, with starvation amplifying pre-weaning deaths. Effective management boosts herd efficiency.

Research Insights on Immunology and Behavior

Recent work evaluates immune cells and analytes in PPDS sows, linking inflammation to dysgalactia. Behavioral analyses show PPDS sows exhibit less activity postpartum, with nesting dropping sharply—potentially diagnostic but overlapping with healthy sow passivity. Semi-natural studies peg peak nesting 3-7 hours pre-farrowing, declining thereafter.

Circulating markers and mammary colonization underscore endogenous infection routes, informing targeted interventions.

Practical Implementation on Farms

Integrate diagnostics focusing on apathy, udder status, and piglet health. Standardize NSAID/oxytocin use for cases. Shift to preventive feeds and hygiene for sustained gains. Danish practices like daily straw and ramped post-farrowing feeding exemplify success. Monitor high-risk sows closely.

Frequently Asked Questions (FAQs)

What is the first sign of PPDS in sows?

Apathy, reduced appetite, and lack of milk ejection are initial indicators, often within 24 hours post-farrowing.

Can PPDS be prevented entirely?

Not entirely, but prevalence drops with fiber-rich prepartal feeds, hygiene, and nesting materials—up to significant reductions reported.

Is fever a reliable PPDS diagnostic?

No; it may be normal postpartum. Use comprehensive signs like coprostasis and piglet status instead.

How does mastitis affect piglets?

Reduced milk leads to starvation, hypothermia, and increased mortality, even if sows show mild signs.

What NSAIDs are best for treatment?

Ketoprofen (3 mg/kg) or flunixin (2.2 mg/kg) effectively reduce inflammation and improve outcomes.

Monitoring and Long-Term Herd Health

Regular audits of farrowing hygiene, feed transitions, and behavioral observations enhance resilience. Collaborate with veterinarians for tailored antibiotic stewardship. These steps not only mitigate PPDS/mastitis but elevate overall reproductive performance.