Similarly, the expression of genes related to lactation and other mammary traits (SLC38A2, SLC35B1), fertility (SLC38A2, MT1E), susceptibility to paratuberculosis, mastitis and trypanosomiasis (IL6), and feed intake/efficiency (MT1E, SLC38A2) was upregulated in Mirandesa cattle45,53–55. This evidence concerns the gene SLC38A2 and mastitis.