TLR4 and echinococcosis: The assessment of TLR4 Asp299Gly and Thr399Ile polymorphisms in patients with recurrent hydatidosis (RH), acute hydatidosis (AH) and healthy groups indicated that the A/G genotype and mutant allele G of TLR4 Asp299Gly have a tendency to be associated with the occurrence of RH and conferred a 3-fold risk for CE susceptibility, whereas the TLR4 Thr399Ile haplotype has been observed only in a patient with pulmonary hydatidosis [29].