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How many hours before administering a vaccine should the chlorinator be turned off and water filters cleaned?

  1. 48

  2. 72

  3. 24

  4. 12

The correct answer is: 72

Turning off the chlorinator and cleaning water filters before administering a vaccine is crucial for ensuring the vaccine's effectiveness and preventing any adverse reactions in the birds. The correct practice is to turn off the chlorinator and clean the water filters 72 hours prior to vaccination. This time frame allows any residual chlorine in the water to dissipate adequately, ensuring that the vaccine is not compromised by the presence of chlorine or chlorinated compounds. Chlorine can inactivate some of the live vaccines and affect their ability to elicit an immune response, making it vital to eliminate it from the system well in advance. In addition, cleaning the water filters ensures that any contaminants or residual chlorine from the water supply are removed, providing a clean environment for the administration of the vaccine. By adhering to this 72-hour window, producers can maximize the efficacy of the vaccination process, promoting better health and growth in the broiler population.