How To Prevent Vaccine Failure
Vaccines failure is said to occur when all the diseases (Gomboro, Coccidiosis, and NCD) we are trying to prevent still occur.
These diseases are best prevented that cured. Vaccine failure occurs due to the following:
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A. Use of chemical water to administer vaccine — never use chlorine treated water. Use just ordinary natural plain and clean water from well, rainfall or stream.
B. Ignorance — Some farmers never see the need to carry out any vaccination. Some substitute vaccination with drugs. Drugs can never substitute vaccine.
Some even think, new birds in a new farm need not be vaccinated.
Some farmers thought that vaccines and its administration are so expensive. Not so, in fact, vaccine is cheaper than drugs.
1000 doses of vaccine is about N500.00 (Five Hundred Naira). Now imagine how foolish it would be to lose your investment because of peanut.
C. Poor handling — right from the point of production, vaccines are expected to be kept cold. Many handlers break this cold chain. This is one of the reasons why we encourage repetition of vaccine.
Buy your vaccine from centres where they use generator to support the sales. Go with portable cooler; put it with some ice block.
At home, if not administered same day, store in freezer.
D. Dead vaccine — When next you go and buy your vaccine, look at the tablet in the bottle. If it has turned powdery, don’t buy it. Or if it half broken, or if has become yellowish in color, don’t buy it.
The vaccine is dead. It will not work. If you use it, you are bound to have vaccine failure.
It is better to go a long distance to a trusted centre to buy it with your portable cooler.
E. Use local vaccine as much as possible. Use vaccine produced in Nigeria by VOM if you are in Nigeria. Local vaccines are developed to meet local strain. Where it is not available, you can go for foreign. But first ask for local ones.
F. Using wrong quantity of water can result to vaccine failure. Some farmers are only guided that 1000 doses must go for 10 litres of watering 500 doses for 5 litres of water and so on.
You must consider the required water intake of your bird at their age.
Now if you use 10 litres for 1000 doses for your 1000 birds at 4 weeks old, How can you be sure that all of them will access the water? Use water as required by your birds during vaccination.
SPECIAL CASES — What if you are in a a situation where you have 500 birds and the only vaccine available is 200 doses?
Buy three of such doses i.e 200 x 3 = 600 doses. Now determine the required water per dosage. Maybe you desire to use 3 litres per 100 doses (as required by your birds) 3Litres x 3 = 9Litres.
It then means you have used:
3 litres to 200 doses = 200 birds
3 litres for another 200 doses = 200 birds
Now you cant use the next 3 Litres, because your birds are not up to 600. Therefore, you share the water into 2 = 1 1/2 Litres (or 1.5 Litres).
All the water used will now be equal to 7.5 Litres.
The other 1.5 Litres will be discarded. Let this be your guide.
* Number of drinkers must be adequate and evenly distributed.
* Once vaccine is constituted, it must be used immediately.
* Some farmers constitute vaccines and each farmer comes for his/her share. That is wrong.
* Left over vaccine must be properly buried.
Culled from FARMING ADVICE DIGEST
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