Thesis (Ph.D.) - Cairo University - Faculty of Veterinary Medicine - Department of Veterinary Hygiene and Management

This study was carried out to help improving two of the most important pillars of any biosecurity programs, Disinfection and Footbath. The aim of this study was to evaluate the viricidal ability of fourteen commonly used and commercially available disinfectants on poultry farms against velogenic Newcastle disease virus (NDV), Low Pathogenic Avian Influenza Virus (LPAI) H9N2 that were isolated locally in Egypt. To simulate the Egyptian field conditions, we used two different surfaces (cement and rubber) contaminated experimentally with the previously mentioned viruses, we also added two interfering materials together, organic matter and hard water. Against NDV our results revealed that three disinfectants out of fourteen were able to pass the test criteria (achieving at least 2.8 log reductions, and no recoverable viruses were isolated after the treatment) these disinfectants were calcium hypochlorite, Halamid® and ZixVirox® while Virkon S®, PIQuat 20®, Aquazix E52®, Fumagri Effisafe® GroundZero ®, Synergize®, Formic, and Citric acid, all failed to pass the test criteria (either not achieving the required log reduction or stopping the viral propagation)

Issued also as CD