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High poultry mortality in Kenya is usually not caused by a single issue—it’s a combination of diseases, management problems, nutrition, and environmental factors. Here’s a clear breakdown based on research and field observations.
1. Infectious diseases (the biggest cause)
These are the leading drivers of death in poultry flocks in Kenya.
Viral diseases
- Newcastle disease (NCD) – often the most devastating; can kill nearly all birds in a flock
- Gumboro (Infectious Bursal Disease) – weakens immunity and causes high chick mortality
- Marek’s disease – causes paralysis and tumors, especially in young birds
- Infectious bronchitis – respiratory disease affecting growth and egg production
Bacterial diseases
- Salmonella and E. coli infections – cause diarrhea, septicemia, and death
- Fowl cholera – can kill birds suddenly during outbreaks
- Bacterial septicaemia – a major recorded cause of death in Kenyan flocks
Parasitic diseases
- Coccidiosis – damages the gut, leading to diarrhea and death
👉 Studies in Nairobi found key causes of death include Gumboro, coccidiosis, bacterial infections, and omphalitis (navel infection in chicks).
2. Poor biosecurity and farm management
Many losses happen because of how farms are managed:
- Mixing birds of different ages (spreads disease easily)
- Poor hygiene and dirty housing
- Visitors or equipment bringing infections
- Overcrowding (increases transmission)
Weak biosecurity is a major reason disease outbreaks escalate quickly.
3. Inadequate vaccination
Failure to follow proper vaccination schedules leads to outbreaks of preventable diseases like:
- Newcastle disease
- Gumboro
- Marek’s
Vaccination is essential but often skipped or poorly timed.
4. Poor nutrition and feeding practices
Feed-related problems can directly or indirectly kill birds:
- Nutrient deficiencies (vitamins, protein, minerals)
- Contaminated or moldy feed (aflatoxins)
- Excess salt or poor-quality rations
These weaken immunity and make birds more susceptible to disease.
5. Environmental stress
Conditions inside the poultry house matter a lot:
- Poor ventilation → ammonia buildup → respiratory disease
- Extreme heat or cold → stress and death
- High humidity → promotes infections
Respiratory problems worsen quickly in poorly ventilated housing.
6. Chick management problems
Young chicks (0–2 weeks) have the highest mortality rates in Kenya:
- Poor brooding (temperature too high/low)
- Lack of clean water and starter feed
- Infections like omphalitis (navel infection)
Early-stage management is critical.
7. Toxins and poisoning
- Mycotoxins (from moldy feed)
- Botulism (from rotten organic matter)
- Chemicals or contaminated water
These can cause sudden deaths with few visible symptoms.
Bottom line
High poultry mortality in Kenya usually comes down to:
- Disease outbreaks (especially viral)
- Poor farm hygiene and biosecurity
- Lack of vaccination
- Feeding and environmental problems
These factors often interact—for example, poor nutrition + overcrowding = faster disease spread and higher deaths.
