Ivermectin treats it.
As addressed earlier, NWS was eradicated as far south as Panama by 2000 when a biological barrier was established using the Sterile Insect Technique (SIT). SIT is the release of mass-produced sterile male flies in strategic areas. The male flies mate with the wild females to produce unfertilized eggs. Since the female NWS flies only mate once, the wild population shrinks until the pest is eradicated. The only fly production facility in the world is in Panama.
While SIT is the only tool we have to eradicate NWS, there are options for treatment once NWS is detected. First, screwworm infestations must be reported to state and federal authorities. Treatment for NWS involves killing and removing the larvae from the infested wound. Nitenpyram is highly effective for killing and expelling NWS larvae quickly.Ivermectin has been successful in treating and even preventing NWS infestations. Screwworms can also be killed by dressing an infested wound with an anti-parasitic such as lindane or ronnel.All wounds must be dressed to promote healing and avoid reinfestation.
NWS is extremely difficult to eliminate and there have been some isolated incidents of re-emergence in the U.S. For example, NWS re-emerged in the Florida Keys in 2016. Officials reacted quickly by releasing sterile flies and by 2017 the pest was eradicated again. This is evidence of just how difficult NWS is to control.