Sometime later, Smear 62 pretty well replaced Peerless. This we'd daub or paint on the wound. It was important that we catch and examine the treated animal again in a week or so to be sure the infestation was controlled. If not, we'd treat the wound again. We'd keep checking infested animals until the wounds were healed.
Screw worms are the larvae of a particular blowfly.
The blue-green screw worm fly is similar in appearance to common blowflies. A key difference, the larvae of the common blowfly feed on dead animal tissue, while the larvae of the screw worm blowfly feed on live animal tissue. Under the U.S. Department of Agriculture's program, large numbers of screw worm larvae were raised on artificial media in closed buildings. Two days before fly emergence, the pupae were exposed to a level of gamma-irradiation that caused sterility. These sterile flies were released in very large numbers by air on a weekly basis.