Minerva Foods was the biggest exporter of beef in South America. It will take control of a San Luis unit in an operation worth US$ 1.5 billion for it and 16 other Marfrig Global Foods plants in Mercosur. Minerva Foods controls Swift in Rosario. Swift Argentina In Mercosur, the Brazilian company Minerva Foods, the biggest exporter of beef in South America, now controls 16 refrigeration plants owned by its rival, Brazilian Marfrig. Argentina, where they bought an establishment, will consolidate their number one…