[Contamination of the air with microorganisms at various distances from the poultry house].

Experiments were carried out to establish the microbial contamination of air (including moulds) at various distances from the buildings for raising birds. Results showed that the presence of organisms in the outer air is directly dependent on the microbial contamination of the air in the poultry houses. It was found that the distances between the buildings are too short and the air driven into the premises is of a high bacterial count. Comparative investigations have revealed that the contamination of the air out of the buildings is likewise dependent on the technologic design of the ventilation system. It is concluded that the low contamination of outdoor air is substantiated by an effective system of forced ventilation on the premises coupled with measures lowering the microbial count indoors.