effect of organic acids and formaldehyde on morphology of broiler intestine and salmonella reduction in feed

control of poultry feed microbial contamination could reduce carcass contamination at processing plants and resultin improvement of public health. in this study the effects of commercial blend of organic acids (salkil® and formycine®), formalin 37% and formaldehyde gas on morphology of intestinal mucosa and gut microflora in broilers were investigated. three hundreds 1-d-old chicks (ross 308) were randomly assigned to 5 groups with 4 replications of 15 birds. the first group was control and fed basal diet without supplemental of additives. the groups 2 to 5 fed diets treated by: 0. 2% salkil, 0. 2% formalin, 0. 1% formycine and formaldehyde gas throughout the experiment(d42). among the experimental groups, formaldehyde destroyed salmonella enteritidis of feed in short time. number of tongue and leaf shape villi (p