Poultry housing systems

The release of the dust is caused by the activity of animals or man or the function of technical equipments in the animal house. Feeding, particularly dry feeding (25), as well as bedding and cleaning activities, the use of different systems of feed distribution, manure removal and ventilation (26) can increase the dust level in the air of animal houses considerably (27). Figure 1 gives an example of the relation between the amount of dust in the air and different activities based on values as reported by CERMAK and ROSS (27) for poultry houses. 

Coccidia are intracellular protazoal parasites that are frequently found in the intestinal epithelial cells of animals they are also found in other tissues (liver), and are usually transmitted by faecal infection. The potential for infection is at its highest when young animals are brought together in intensive housing systems (e.g. poultry-broiler production). As a result coccidiosis is a major issue for the poultry industry throughout the world. 

Bubier N.E. and Bradshaw R.H. (1998). Movement of flocks of laying hens in and out of the hen house in four free-range systems , British Poultry Science, 39, 5-18. 

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