Abstract
Context Drinking water vaccination of young meat chickens with Infectious Laryngotracheitis (ILT) vaccine is problematic. Vaccine failure and adverse vaccine reactions are frequently reported. Variations in the technique of applying ILT vaccines by this mass vaccination method need to be understood to contribute to improving the success of vaccination. Aims This study aimed to examine variations in the techniques of application of Infectious Laryngotracheitis vaccines via drinking water for young meat chickens. Methods Drinking water vaccination techniques were observed and recorded across 52 broiler flocks during ILT outbreaks in three geographic areas of Australia. Descriptive statistics for all variables were computed and variations between integrator company procedures were statistically compared. Key results Despite rigorous standard operating procedures, wide variations were observed in time of water deprivation prior to vaccination (3–15 min), time drinking water was stabilised prior to addition of vaccine and the type of stabiliser product used, time to activate the flock following filling of the water lines with vaccine (10–127 min), time for the vaccine to be consumed (36–226 min) and the volume of drinking water per bird used to provide the vaccine (11–48 mL/bird). Conclusions Variation in vaccination technique can affect the success of drinking water vaccination against ILT in young meat chickens. Implications Understanding the importance of the variable factors in vaccine application method can improve the success of water vaccination against ILT.
Subject
Animal Science and Zoology,Food Science
Reference28 articles.
1. Spread of the newly emerging infectious laryngotracheitis viruses in Australia.;Infection, Genetics and Evolution,2016
2. A practical method for assessing infectious laryngotracheitis vaccine take in broilers following mass administration in water: spatial and temporal variation in viral genome content of poultry dust after vaccination.;Veterinary Microbiology,2020
3. Animal Science Products Inc. (undated) Vac-Pac-Plus®. Available at [Accessed 16 July 2021]
4. APVMA (undated) Australian Pesticides and Veterinary Medicines Authority. Available at [Accessed 12 September 2022]
5. Arzey GG, Arzey KE (2009) ILT-protection against Class 8 NSW ILTV – challenge trial 2008. In ‘Proceedings scientific meeting of Australasian Veterinary Poultry Association.’ 11–12 February. (AVPA: Sydney, Australia)