arg2:GFP expression was reminiscent of our previous observations using the pro-inflammatory TgBAC(il-1β:GFP)sh445 transgenic line, in which neutrophil il1b was found at 1 hpw in the tailfin and 1 dpi in Mm infections, the same timepoints at which arg2:GFP expression was observed (Ogryzko et al., 2019). The gene discussed is IL1B; the disease is infection.