By Anthony Boadle and Lisandra Paraguassu BRASILIA (Reuters) – An illegal gold mining boom on Brazil’s largest indigenous reservation has brought disease, violence and grave human rights violations on the Yanomami people, according to research and allegations included in a new report on Monday, blaming high gold prices and tacit government support. The report by the Hutukara Yanomami Association found a 46% rise in wildcat mining last year on rivers in the reservation where some 29,000 Yanomami live in northern Brazil, threatening isolated communities with little or no other outside contact. U…