STM Article Repository

The aim of this study was to investigate the effect of three different levels of Syrian natural zeolite on the bacterial load concentrations in the air of broilers farms for five weeks. This study was conducted in private commercial broiler farm in the Lattakia Governorate, Syria. During the period of 2021 in spring (from March to April), and in autumn (from October to November) seasons. In the experiment, commercial broiler hybrid (Roos 308), with a total number of three thousand one day old were randomly assigned to four groups. Each group (750 birds) has three replicates with 250 birds in each replicates (in addition to the control section), this experiment was designed using complete randomized. The results showed that the average concentrations value for Staphylococcus spp. during spring, at the fifth week of the fattening period, in the treatment Tz3 (75%) was recorded 4.1×105 CFU/m3, while in autumn; the value was 4.3×105 CFU/m3. And for Escherichia coli in spring, was 3.8×103 CFU/m3 and in the autumn 7.5×103 CFU/m3. The results concluded that the addition of Syrian natural zeolite to the broiler litter resulted in significantly (p<0.05) decrease of airborne bacteria at the end of experiment with superior effect to Tz3 treatment in the internal air, and the the lowest concentration was noted in spring compared to autumn. This result provides a guide to the optimal use of the different ratios of the Syrian natural zeolite, and development of new way to reduce the airborne microorganism in the broiler farms.