I have over 10 years of experience in Home Health as an RN, and I can tell you maggots ARE used in wound care, but they are grown in the lab so don't carry disease. One of the most common bacteria I have seen carried by maggots is.....oh, poopie, I forgot the name, brain fart! Anyway, do a search for saline, rinse the wound several times a day with it, and use tweezers to remove any maggots you find. They do only eat the dead tissue, but since they are probably carrying all kinds of nasty bacteria they will continue to spread infection and thus cause tissue death. Maybe sprinkle a little DE on the wound.....Iodine, betadine, peroxide all cause damage to healthy tissue.
An infected wound is usually much larger than the area you have first observed, as underlying tissue is almost always affected as well.
Keeping the wound moist is essential for healing. Saline is the most common rinse/cleanse agent as it is the same % of salt/water as blood.