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Establishment of a PPR Global Research and Expertise Network (PPR-GREN)

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Paul Rossiter <[log in to unmask]>
Mon, 3 Feb 2014 11:21:28 +0000
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Colleagues, 
 
Concerning key positive and negative factors influencing PPR control. 

From my point of view, which depends on field investigations and observations, studying the risk factors that contribute to PPR occurrence and spread should be prior to setting of control policy and should determine the suitable time and season for implementing the proposed policy. In my country, Sudan, sheep and goats husbandry system can be divided into 3 catogeries: 1- Sedentary with open grazing system, 2- Transhumance pastoralist, and 3- intensive production which is the smaller group in the three while systems 1 and 2 represent the majority of small ruminants populations. We observe that there are shared pastures and water points for different herds from different states and even different countries, and that they gather more during rainy seasons and after it. In my study (unpublished yet) I have found  a significant association between the high rainfall and PPR sero-positivity in unvaccinated sheep and goats. Therefore, I have conclude that
 the vaccination programme should be implemented as follows:
1): before the rainy season in all of Sudan's states with prioritization of the states which contribute potentially to small ruminant exports or through which herds for export are transported. 
2): Vaccination should be planned according to the number of sheep and goats population in the state taking into account the transhumance movements routes, and should reach a minimum 80% percent coverage.
3): There should be a thorough monitoring of herds crossing country and state borders as much as possible.
4): The efficacy of vaccination should be evaluated.

These points could be valuable for other diseases beside PPR.


Huyam Salih, Khartoum- Sudan, PhD research on "Developing risk assessment and management for PPR disease in Sudan", 2011-2014.


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