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FAO/12653
RIDAFCONFÉRENCES ÉLECTRONIQUES

The Scope and Effect of Family Poultry Research and Development

The use of thermostable Newcastle disease vaccines in Mozambique

R. G. Alders and R. Fringe

As has been recognized by others, the control of Newcastle Disease (ND) is the starting point for improving village chicken production and hence improving household food security. With this in mind, the National Veterinary Research Institute and the Australian Centre for International Agricultural Research (ACIAR) designed a project looking at the control of ND in village chickens in Mozambique. From the outset it was recognized that the confirmation of the efficacy of live, thermostable vaccines against ND was only part of the picture. The aim was also to have efficient communication systems in place that gave farmers the best chance of success when using the ND vaccine and to ensure that sustainable cost-recovery mechanisms were developed.

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In order to control ND in village chickens in Mozambique, two field trials with live, thermostable vaccines were carried out.

Field trial 1
The field trial using the NDV4-HR live, thermostable vaccine was conducted over 12 months. Four different groups were monitored: eyedrop (single administration); drinking water (single administration); oral drench (single administration); and control (mock vaccination). Groups were allocated by a lottery conducted at a community meeting. The vaccine was diluted using clean, local water to eliminate the costs associated with the use of commercial diluent. For the drinking water group, farmers were asked to bring a clean glass or plastic container to a central location to collect the pre-prepared vaccine. It was recommended that the vaccine be placed in a non-metallic recipient in the shade. The administration of the eyedrop and oral drench was done by local extension workers or farmers. The trial commenced with the vaccination of a total of 2,057 birds and re-vaccination was done at 4-monthly intervals.

Field trial 2
The NDV4-HR vaccine is a commercial vaccine only available for purchase from Malaysia or Australia. Foreign exchange is in short supply in Mozambique and so it was thought wise to trial the local production of the I2 ND vaccine that has been made available to developing countries free of charge by ACIAR. The field trial with the I2 ND vaccine commenced with 670 birds and lasted for 5 months. The four groups were: eyedrop (given twice, three weeks apart); eyedrop (single administration); drinking water (given twice, three weeks apart); a control (mock vaccination).

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Field trial 1
Changes observed in chicken population after vaccination are shown in Table 1.

Table 1: Change in chicken population 12 months after administering the NDV4-HR live, thermostable vaccine

The farmers preferred the eyedrop route even though it meant catching their birds (around 50% of which roost in trees). They said with eyedrop administration, they knew that the birds were vaccinated and also appreciated the greatly reduced mortality.

Field trial 2
The Table 2 gives overall changes in chicken population after vaccination.

Table 2: Overall change in chicken population 5 months after administering the I2 ND vaccine

Once again, the preference of farmers was for single eyedrop administration. The fact that the vaccine could be given less frequently via eyedrop was a strong point in its favour. The best participation on vaccination days was always achieved during school holidays when children were available to chase and carry chickens.

Components of a successful field ND vaccination campaign (Field trial 1 & Field trial 2)
1. An appropriate vaccine - the NDV4-HR and I2 ND vaccines would appear to be the best options currently available. They are thermostable, easy to administer, cheap and safe to both chicken and handler.

2. An appropriate support structure which includes appropriate communication systems - the vaccines must be easily available to farmers and adequate training must be given to ensure that the farmers have a good chance of success.

3. A robust cost-recovery system - everyone handling the vaccine must feel that they are getting value for money. When the supporting project structure goes, the distribution of the vaccine will only continue if it is paying its way.

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Many of village poultry farmers do not own ruminants and, consequently, will have had little or no contact with veterinary services. In addition, village poultry are frequently cared for by women, many of whom are illiterate. Special attention is required in the preparation of extension material for this target group. In Mozambique at least, many farmers are not aware that a vaccine against ND exists and can be skeptical: "how can there be a vaccine for chickens when my children don•t even get vaccinated?" In response, we have enjoyed working with farmers and artists to prepare the following extension material:

1. Radio programs - a radio drama; a question and answer program; in Portuguese and four local languages;

2. A ND vaccination song - prepared by the Mozambican Musicians Association with versions in Portuguese and three local languages after visiting one of the vaccine field trial sites;

3. A pamphlet and poster in Portuguese;

4. A drama piece - written by a local theatre group with experience in community development after visiting one of the vaccine field trial sites;

5. A ND field manual - written in Portuguese; and

6. A flip chart for use by front line staff - it uses clear, largely self-explanatory line drawings with an accompanying narrative in Portuguese. Local frontline staff translate the Portuguese into the appropriate local language.

It has taken us three years to get this far but in this field we believe that "slow and steady wins the race". I would like to hear what other people•s experiences have been in the area of extension material for village poultry farmers.

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Alders, R.G., Fringe, R., Harun, M., Manganhela, A., Mata, B., Spradbrow, P.B. and Anjos, F. (1998): A Doenäa de Newcastle nas Galinhas do Sector Familiar: Manual de Campo. Mozambican National Veterinary Research Institute and the Australian Centre for International Agricultural Research, Maputo. [In Portuguese]

Alders, R.G. and Spradbrow, P.B. (1998): Newcastle Disease in Village Chickens: A Field Manual. Newcastle Disease Vaccine Component of the National Livestock Services Project, Ministry of Food and Agriculture, Ghana.

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Table of Contents

Lead Papers

Additional Papers

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