IL4R and Nematoda infectious disease: The competitive advantage during nematode infection was confirmed with H. polygyrus, in which the proportion of RELMα positive peritoneal macrophages in LysMCre IL-4Rαflox/− mice increased from 4% in naive mice to 25% at day 14 and 70% by day 28, by which point >50% of the macrophages expressed the IL-4Rα 19.