Yolk Sac Infection (Omphalitis) in Broiler Chicks: Management and Prevention in Zimbabwe’s Poultry Industry

Introduction

 Yolk Sac Infection, also known as Omphalitis or Mushy Chick Disease, is a multifactorial condition affecting newly hatched chicks, characterized by delayed yolk sac absorption and bacterial contamination of the residual yolk. It is one of the leading causes of early chick mortality in the poultry industry. The disease affects chicks during the first week of life and is characterized by infection of the yolk sac and unhealed navel, resulting in poor growth, increased mortality, and economic losses for poultry farmers. The condition is frequently associated with poor hatchery hygiene, suboptimal incubation conditions, inadequate navel closure, and poor brooding management.

Causes of Yolk Sac Infection

The disease is mainly caused by bacterial contamination of the yolk sac before the chick’s navel completely closes. Common bacteria involved include:

• Escherichia coli (E. coli)
• Staphylococcus
• Streptococcus
• Pseudomonas
• Proteus

 Risk factors include:

• Dirty hatching eggs
• Poor hatchery sanitation
• Incorrect incubator temperature and humidity
• Delayed chick placement
• Poor brooding management
• Wet and contaminated litter

Clinical Signs

Affected chicks may show:

• Swollen or unhealed navel
• Enlarged abdomen
• Depression and weakness
• Poor feed intake
• Huddling under heat sources
• Stunted growth
• Increased mortality within the first 7–14 days of life

Recommended Management Program

1.  Antibiotic Therapy – Ashienro 10% Oral Solution

Ashienro 10% Oral Solution (Enrofloxacin 10%) is recommended for controlling bacterial infections associated with yolk sac infection.

Benefits:

• Broad-spectrum antibacterial activity
• Effective against coli, Salmonella, Staphylococcus and other susceptible bacteria
• Rapid absorption and distribution throughout the body
• Helps reduce mortality and secondary bacterial complications

Recommended Administration:

Administer 1 ml of Ashienro 10% Oral Solution per 2 litres of drinking water for 3–5 days drinking water continuously.

2.  Stress Management – Stresswin

Yolk sac infection places chicks under severe physiological stress, reducing immunity and recovery.

Benefits of Stresswin:

• Reduces stress caused by infection and handling
• Improves feed and water intake
• Supports immune function
• Enhances chick vitality during recovery

Recommended Use:

Administer in drinking water alongside treatment according to label recommendations.

3.  Nutritional Support – Ashiboost

Recovery from infection requires enhanced nutritional support.

Benefits of Ashiboost:

• Supplies essential vitamins, amino acids and metabolic cofactors required for tissue repair, immune competence and growth recovery.
• Promotes appetite and growth
• Enhances immune response
• Accelerates recovery and flock uniformity

Recommended Use:

Administer it in drinking water during and after antibiotic treatment as directed on the product label.

Treatment Protocol 

Day	Product	Purpose
Day 1–5	Ashienro 10% Oral Solution	Control bacterial infection
Day 1–5	Stresswin	Reduce stress and improve recovery
Day 1–7	Ashiboost	Nutritional and immune support
Continuous	Clean water and proper brooding	Support treatment effectiveness

 

Preventive Measures for Zimbabwean Poultry Farmers

Prevention remains the most effective strategy because treatment success can be limited once severe infection develops.

Hatchery Management

• Use only clean, quality hatching
• Avoid setting heavily soiled
• Disinfect incubators and hatchers
• Maintain correct incubation temperature and
• Remove cracked eggs

Brooding Management

• Prepare brooding houses before chick
• Maintain adequate brooding
• Provide clean, dry
• Avoid
• Ensure continuous access to clean drinking

Biosecurity

• Restrict unnecessary
• Disinfect equipment and
• Control rodents and wild
• Clean and disinfect poultry houses between

Nutrition

• Use high-quality starter
• Provide vitamin supplementation during stressful
• Ensure proper feeder and drinker

Economic Importance

Yolk sac infection can result in:

• Increased chick mortality
• Poor flock uniformity
• Reduced weight gain
• Higher medication costs
• Lower overall profitability

Early intervention with Ashienro 10% Oral Solution, supported by Stresswin and Ashiboost, can significantly improve chick survival and performance while reducing economic losses.

Conclusion

Yolk Sac Infection remains a major challenge in Zimbabwe’s poultry industry, particularly during the brooding period. Successful management requires early diagnosis, prompt antibacterial treatment using Ashienro 10% Oral Solution, stress reduction with Stresswin, nutritional support from Ashiboost and strict adherence to biosecurity and hygiene standards. By combining effective treatment with sound preventive practices, poultry farmers can achieve healthier flocks, improved performance and better profitability.