SCIENTIFIC FIELD REPORT | SAIGON VET

FROGS SUFFERING FROM CLOUDY EYES AND BLOATING AFTER RAIN

A practical, field-tested approach to minimize losses and facilitate stock recovery within the first 24–48 hours.

In high-density farming environments—following heavy rain, water exchanges, or when water sources between ponds become interconnected—decisions made within the first six hours are often critical to controlling losses and ensuring end-of-season profitability.

CURRENT CHALLENGES FACING VIETNAMESE FROG FARMERS

In many concentrated farming regions, the "blindness and bloating" syndrome frequently occurs after rainfall, spreading rapidly and causing significant impact.

• Environmental fluctuations following rainfall

• Increased pressure from opportunistic bacteria

• High stocking density and interconnected water sources

• Risk of continuous reinfection from the environment

• Loss of appetite, weak swimming, and rapidly rising mortality rates

Therefore, treatment requires a multi-factorial approach rather than focusing on a single pathogen.

PRACTICAL OBJECTIVES

Early detection

Rapid reduction in mortality rate

Maintenance of feed intake

Restoration of weight gain and herd size

1. IDENTIFICATION

• Rate of feed refusal

• Degree of abdominal distension

• Rate of mortality increase following rainfall

• Swimming and feeding reflexes

• Cloudy or swollen eyes

• Reddened anus, inflamed intestine

2. EARLY-STAGE TREATMENT

Sulfonamide-trimethoprim combination

• Commonly used to reduce opportunistic bacterial loads

• Effective against various Gram-negative enteric strains

• Suitable for the early outbreak stage following environmental stress

• Requires feed adjustment to ensure the stock continues to consume the medication

• Combine with measures to stabilize the water environment after rainfall

3. SEVERE SIGNS

Active ingredient often considered: fosfomycin

• Soft abdomen, presence of fluid

• Prolonged intestinal inflammation

• Pale liver, rapidly increasing mortality

• Efficacy depends on the extent of damage and pond conditions

ACCURATE SEVERITY ASSESSMENT

• Distinguishing between early, moderate, and severe stages helps guide appropriate management.

• Prioritize a holistic assessment of the stock rather than focusing on a single isolated symptom.

• Simultaneously monitor the level of feed refusal, swimming reflexes, and the rate of mortality.

• Early intervention is often the deciding factor in saving the stock during the first 24–48 hours.

WHEN SEVERE SIGNS APPEAR

• When the abdomen is soft and fluid-filled, intestinal inflammation is prolonged, or the liver appears pale, the condition may have deeply affected the digestive system and internal organs.

• In practice, fosfomycin is often considered due to its tissue penetration capabilities and activity against Gram-negative enteric bacteria.

• The choice of treatment should be based on feed/medication intake, the severity of the damage, and actual environmental conditions.

THE RECOVERY PHASE – A KEY FACTOR FOR PROFITABILITY

• Once the acute phase is brought under control, the next objective is to restore appetite and growth.

• In practice, this often involves a combination of vitamins, anti-stress agents, liver support, and measures to improve digestion and nutrient absorption.

• Effective recovery helps minimize recurrence, maintain flock/herd uniformity, and shorten the production cycle.

SUGGESTED SOLUTION APPROACH

• Farmers often combine products for gut bacteria control, digestive and liver support, and post-stress recovery.

• Specific choices should be based on the stock's condition, stocking density, feed intake, and pond environmental conditions.

• Field assessments are necessary to tailor the solution appropriately, rather than applying a fixed formula to every situation.

AO
10.000
CON

Reducing early-stage losses by an additional 8–10% = retaining hundreds to thousands of market-ready animals = generating a significant profit difference.