The Brazilian Ministry of Agriculture has suspended protein shipments to China due to a potential case of 'mad cow' disease, leaving the decision for reinstatement to Beijing. This suspension comes as a setback to major beef exporters such as JBS SA, Marfrig Global Foods, and Minerva SA, which rely heavily on the Chinese market, accounting for approximately 60% of Brazil's beef exports. Meanwhile, Uruguayan and Argentinian companies like Minerva and Marfrig are set to fill the demand from China, potentially increasing their market share amidst the suspension.