Finally found one of the posts I was trying to find, about cockroaches:
Poultry Eye Worms
This worm is very harmful to poultry in the Southern States of the USA .Hawaii , Philippines and other subtropical areas. It is a small white worm that lodges in the corner of a chicken's eye. The eye becomes swollen, inflamed, and watery. Impairing the chickens vision. The eyelids may stick together and the eye may turn cloudy and eventually be destroyed. The chicken may try to scratch the eye to get rid of the irritation.
Eye worms have a indirect cycle. When the worm deposits the eggs in the eye, they pass into the tear duct, they are then swallowed by the chicken and expelled in droppings, and are eaten by the Surinam cockroaches. When the chicken eats the infective cockroach, worm larvae migrates up the esophagi to the mouth thru the tear duct, and into the eye. Wild birds are also infected, and they help spread the Eye Worm to chicken flocks. To control eye worm you must control the cockroaches around the chicken houses.
NOTE THESE BIRDS IF INFECTED AND HANDLED BY YOU CAN LEAVE THE INFECTION ON YOUR CLOTHING OR SHOES AND YOU WILL CARRY IT HOME, OR YOU WILL BRING IT HOME WITH INFECTED BIRDS.
Be sure and never wear the same shoes or clothing to the bird barn that you wear visiting a bird owners barns.
The eggs of the disease are in the fluid of the eye of the infected bird. The bird carries a high fever and the fancier needs to doctor it immediately. Use a medicine called VETRX and put it directly into the eye, around the eye, down the throat, and in the water. Do this three times the first week and twice the second week and should clear it up. Continue to put the VetRx on the eye for 4 weeks.
