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it is a mathematical formula based on the halfe life of maternally derived antibodies. it is used to estimate the optimal age of infectious bursal disease, an avian viral pathology, which leads to immunodepressoin in chickens.
The Deventer formula is as follows:
Vaccination age = { (log2 titre bird% - log2 breakthrough) x t1/2 } + age at sampling + correction 0-4
In which
Bird% = ELISA titre of the bird representing a certain percentage of the flock
breakthrough = breakthrough (ELISA) titre of the vaccine to be used
t1/2 = half-life time (ELISA) of the antibodies in the type of chickens being sampled
Age at sampling = age of the birds at sampling
Correction 0-4 = extra days when the sampling was done at 0 to 4 days of age.
What else can I help you with?
What has the author Leonard Pearson written?
Leonard Pearson has written: 'The effect of tuberculosis vaccination upon cattle infected with tuberculosis' -- subject(s): Tuberculosis in cattle 'Diseases and enemies of poultry' -- subject(s): Poultry, Diseases, Birds, Poultry Diseases, Mammals
Why 18 days old eggs are used in inovo vaccination in poultry?
Because it is the date of transfering the hatching eggs fro the incubators to the hatchers which and optimal for the embryo.
What is the vaccination schedule for broilers layers and cattles?
A detailed vaccination schedule for broilers and layers can be seen at a website called Poultry Industry. Go to Google and search for "engormix". Upon entering the website, click on "Technical Articles" and then "Health". Choose "Poultry Vaccines" and browse the page for the article entitled, "Vaccination in Poultry". For cattles, go to the website MSD Animal Health. Hover over the "News" tab and the choose "Cattle Vaccine, Dipping and Dosing Guides".
How can you use the cost per serving formula when buying poultry?
by seeing if they are over charging you for what you are buyinq !
What are the introduction of poultry diseases?
Poultry disease can be introduced several ways. Animal to animal vectors, airborne, Human to animal transfer, and introduced via feed and water. Most large Poultry operations enforce Bio security measures to reduce this problem.
What is choice cut in poultry What are definition in poultry?
Poultry is chicken or pork
What is a sentence with poultry in it?
Poultry farms have chickens in them
Is poultry is service or goods?
Poultry are goods.
What is poultry in French?
Poultry in French is Volaille.
What is the German word for poultry?
poultry = Geflügel
What is poultry feed?
Poultry food is chicken
Does all usda meat and poultry contain vaccines?
Not all USDA meat and poultry contain vaccines. Vaccination is primarily used in livestock to prevent diseases before they are processed, but the vaccines do not remain in the meat itself. The USDA regulates the use of vaccines in animals, ensuring that any residues are within safe limits and that the meat is safe for consumption. Always check with specific producers or labels for detailed information.
