Assessment Efficiency of Some Chemical Disinfectants Commonly Used Against Coccidia in poultry Farms

Efficiency of four commercial disinfectants including ammonium hydroxide, phenol, Eco.Bio (combination of QACs and gluteraldehyde) and Zixvirox (combination of peracetic acid and hydrogen peroxide) was evaluated against unsporulated E. tenella oocysts which were obtained from naturally infected birds with ceccal coccidiosis then propagated in broiler chicks reared on wire cage and fed anticoccidial free starter ration from day one of rearing till the end of experiment. The oocysts were exposed to the disinfectants at different concentrations and different contact times. In addition, the effect of some environmental factors including temperature, pH and presence of organic matter on the efficiency of these disinfectants were also studied. Based on obtained results of the current study, it was observed that the most effective disinfectants against unsporulated E. tenella oocysts were ammonium hydroxide 5% and 10% and Phenol 10%. While Eco. Bio and Zixvirox, were less effective. Also, the results proved that the inhibitory activity of the tested disinfectants was greatly increased by increasing their concentrations or the contact time. Moreover, rising temperature increased the efficacy of all tested disinfectants except Zixvirox. Addition of organic matter in the form of (10% chicken faeces) reduced the efficacy of both Zixvirox and Eco.Bio disinfectants by 52.9% and 47%, respectively. While Ammonium hydroxide and Phenol disinfectants were not affected by addition of organic matter. Finally, the highest efficacies of both Ammonium hydroxide and Eco.Bio disinfectants were attained at alkaline pH, while for Phenol and Zixvirox were active at acidic pH.