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:

YearNumber of HatcheriesCapacityAvg Capacity per HatcheryPullorum Clean (% of Capacity)
1936101738,066,24537,430---
19412465117,915,75447,8367.7
19463952259,452,94365,65110.3
19514482383,642,94385,59634.6
19563157369,239,267116,95981.7
19612098364,752,001173,85795.1
19661311328,034,316250,21799.7
19701073323,632,591301,615100.0

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References

  1. 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.
  2. 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.

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