< > Physical Factors / Environmental Components:
Climate, Atmosphere, Radiation & Electricity

Individual Physical Factors directly causing disease

• Daylength - incorrect / abnormal
• Electricity
• Hail storms
• High winds
• Humidity - incorrect incubation humidity
• Lightning
• Radiation - High energy (X-ray,  etc.)
• Radiation - Sunlight (UV Radiation)
• Temperature - extreme direct cold
• Temperature - extreme direct heat
• Temperature - high ambient
• Temperature - low ambient
• Temperature - incorrect incubation temperature
• Visibility reduced
• Ventilation - inadequate