Wide mediastinum is caused by aortic rupture or mediastinal hematoma, but poor radiographic technique can lead to a mistaken diagnosis. The plain chest film and the aortogram are essential for the proper diagnosis of widened mediastinum in trauma.
1 Temperature: Chicken eggs should be incubated at a temperature between 99 and 102 degrees Fahrenheit (99.5 is often considered to be ideal). 2  Avoid temperatures outside the 97â103 Â°F (36â39 Â°C). 3  range. 4  If the temperature remains beyond either extreme for several days, hatchability may be severely reduced.
The comfortable temperature for optimum laying ranges from 18.3 to 21.5Â°C (65Â°-70Â°F). Both higher and lower temperature affect the egg production and quality of eggs adversely. Egg production starts declining when temperature rises more than 27Â°C while egg size starts reducing from temperature of 24.5Â°C onwards only.The higher temperature in general is more harmful to birds than lower temperature.bout 12 to 15 cm linear feeder space and 2.5 cm water space per bird is adequate during laying. On deep-litter system one laying nest for every 4 to 5 hens with perch at entrance is provided for comfortable laying and clean egg production.