Gapeworms are common in young, domesticated chickens and turkeys. When the female gapeworm lays her eggs in the trachea of an infected bird, the eggs are coughed up, swallowed, then defecated.hen birds consume the eggs found in the feces of an intermediate host such as earthworms, snails (Planorbarius corneus, Bithynia tentaculata and others), or slugs, they become infected with the parasite. The drug Ivermectin is often used to control gapeworm infection in birds.
Maguire and colleagues reported that Avastin delivered monthly cost an average of $595 and Lucentis cost $23,400. If the drugs were taken only as needed, rather than on a monthly basis, the cost dropped for both drugs, but Avastin was still the bargain choice: $385 for the year of treatment compared with $13,800.f the drugs were taken only as needed, rather than on a monthly basis, the cost dropped for both drugs, but Avastin was still the bargain choice: $385 for the year of treatment compared with $13,800.
Everyone would have switched to Lucentis except for one thing: cost. Genentech makes both Avastin and Lucentis. For cancer treatment, huge doses of Avastin are needed. The tiny dose needed for AMD costs only $50. A single dose of Lucentis costs $2,000.Medicare had little choice but to pay for Lucentis, as it was the only proven drug for AMD.pril 29, 2011 -- Fifty-dollars worth of Avastin prevents blindness from age-related macular degeneration (AMD), and does it just as well as $2,000 worth of Lucentis, a federally funded clinical trial finds.