Unregulated expression of retnlb, however, can also lead to mucosal inflammation during infection of mice with T. muris[35] as well as the expression of ptgs2 and c3ar1[36] that are induced by asthma/allergy associated inflammation and were differentially expressed in pigs with high T. suis worm burden with increased mucosal pathology. Here, C3AR1 is linked to allergic disease.