LTA4H and tuberculosis: In addition, there are data from TB patients in Vietnam showing an association between individuals with a T597C allele in the TLR2 gene and susceptibility to infection by the Lineage 2/Beijing genotype (117); and an association of individuals with an SNP in the leukotriene A4 hydrolase (LTA4H) promoter with an excess of inflammation and TB severity (156).