Abstract: Deep-litter-system is a environmental protection and energy conservational technology. whether it has undesirable impact on epidemic disease control or not is another aspect need to pay close attention.Collecting samples from one area with bred by ifferent ways and detecting by Dot blotting and immune body technique. The results indicate that there are no dissimilarity in MDV and REV detection, the difference is obvious in CAV (positive ratio is 28% in deep-litter-system while traditional plastic net breed is 86%) and NDV HI vaccination (P<0.01). Deep-litter-system can effectively control loimic infection.

Key words: deep-litter-system; meat-type chickens; virus infection