Vaccines

Chlorine interference in poultry drinking-water

Water-based vaccination is a widely used method in commercial poultry production, enabling efficient administration of live attenuated vaccines across large flocks with minimal handling stress. The effectiveness of this method is highly dependent on water quality, particularly when drinking water is sourced from municipal systems that contain residual chlorine.

Chlorine is essential for maintaining microbiological safety in public water supply; however, it presents a well-recognized challenge for water administered poultry vaccination programs. Having strong oxidizing properties, it can inactivate live vaccine organisms before they are consumed by birds.

Chlorine as a limiting factor in vaccine viability

Chlorine use in municipal water systems is important because it effectively destroys bacteria, viruses, and other pathogens. However, the same disinfectant action can adversely affect live poultry vaccines, including Newcastle disease virus (NDV) vaccines, Infectious bronchitis virus (IBV) vaccines and Infectious laryngotracheitis (ILT) vaccines. These vaccines rely on live attenuated organisms to induce immunity. Presence of chlorine can inactivate the vaccine and reduce vaccine efficacy, resulting in incomplete or uneven flock immunity (Gentry, M.O. Braune, 1972).  

Evidence of chlorine related vaccine inactivation

Controlled studies have demonstrated that even low residual chlorine levels can rapidly reduce the viability of live vaccine viruses in water (Gentry, M.O. Braune, 1972). The rate of inactivation is influenced by chlorine concentration, temperature, contact time before ingestion and water system dynamics (mixing, flow, storage delays). These factors collectively determine how much active vaccine remains by the time birds drink the solution.

Field observations in poultry production

In commercial settings, inadequate chlorine neutralization has been associated with variable antibody responses within the same flock, reduced seroconversion following NDV and IBV vaccination and uneven immunity distribution across housing sections

Such variability is often traced back to untreated or partially treated water systems.

Arteguard and its functional role in vaccine delivery systems

Arteguard™ is an effervescent chlorine-neutralizing powder designed to improve the reliability of live vaccine delivery through drinking water. Its usefulness extends beyond simple chlorine neutralization by addressing several practical challenges associated with vaccination in modern poultry systems, particularly those using treated public water supplies.

Presented as a novel effervescent powder, ensures rapid and uniform dispersion in the water, quickly binding and neutralising chlorine so the vaccine remains viable from preparation through to consumption.

Chlorine neutralisation by Arteguard™ (over 15 minutes).

Arteguard™ contains a blue dye marker that allows rapid assessment of vaccine uptake. By tinting the drinking water and temporarily marking beaks or tongues, it provides a simple visual confirmation that birds have consumed the vaccine. Early detection enables immediate corrective action, improving overall vaccine coverage.

Impact on biosecurity and flock health management

Reliable vaccine delivery reduces the risk of partial immunization, which can leave immune gaps within flocks, increase susceptibility to disease outbreaks and compromise production performance in high-density systems.

Arteguard™ provides an integrated solution that enhances vaccine stability, improves operational consistency, and enables verification of vaccine uptake. By addressing both chemical and practical challenges in water-based vaccine delivery, it supports more reliable immunization outcomes and strengthens overall flock health management.

Contact the CCD Animal Health for more information on Arteguard™.