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PPR was first reported in Ivory Coast in 1942 and has since spread globally.

EU regulations state that the entire flock must be culled once a PPR case is confirmed, with the affected farm then disinfected.

At the weekend, ministry officials also held urgent meetings with local authorities in the regions where the new PPR cases had been detected.

Plants have at least a dozen and, in some cases, as many as several thousand of these special PPR proteins, each one of which corrects highly specific defects.

Rather than being made in the organelles in which they are used, however, the PPR proteins are manufactured outside of the organelles, within the cytosol.