National Poultry Improvement Plan
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The National Poultry Improvement Plan was established in the U.S. in 1935. It is a uniform plan that helped control Pullorum disease and later other diseases (S. pullorum, S. gallinarium, S. typhimurium, and M. galliseptum.)[1]
The following table[2] shows how the hatcheries participated in the National Poultry Improvement Plan eliminated Pullorum disease (and also grew in size) during the mid-20th century:
| Year | Number of Hatcheries | Capacity | Avg Capacity per Hatchery | Pullorum Clean (% of Capacity) |
| 1936 | 1017 | 38,066,245 | 37,430 | --- |
| 1941 | 2465 | 117,915,754 | 47,836 | 7.7 |
| 1946 | 3952 | 259,452,943 | 65,651 | 10.3 |
| 1951 | 4482 | 383,642,943 | 85,596 | 34.6 |
| 1956 | 3157 | 369,239,267 | 116,959 | 81.7 |
| 1961 | 2098 | 364,752,001 | 173,857 | 95.1 |
| 1966 | 1311 | 328,034,316 | 250,217 | 99.7 |
| 1970 | 1073 | 323,632,591 | 301,615 | 100.0 |
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References
- ↑ Funk, E. M. (1974). Hatcheries: Commercial Hatcheries Provide Ready-made Farmer Egg Machines. In John L. Skinner, O. A. Hanke, & J. H. Florea (Eds.), American Poultry History 1823-1973 (pp. 162–183). Madison, WI: American Printing and Publishing, Inc., p. 172.
- ↑ Funk, E. M. (1974). Hatcheries: Commercial Hatcheries Provide Ready-made Farmer Egg Machines. In John L. Skinner, O. A. Hanke, & J. H. Florea (Eds.), American Poultry History 1823-1973 (pp. 162–183). Madison, WI: American Printing and Publishing, Inc., p. 183.
