Respiratory diseases in chickens
AuthorL. A. Page
Author AffiliationsL. A. Page is Lecturer in Veterinary Medicine, University of California, Davis.
Hilgardia 15(6):8-8. DOI:10.3733/ca.v015n06p8. June 1961.
Infectious coryza, a respiratory disease of chickens, is caused by the bacterium Haemophilus gallinarum. The disease has continuously plagued sections of the poultry industry in California for a number of years. Since prevention and control measures have met with relatively little success, new approaches have been made to the study of the disease. Haemophilus organisms associated with recent field cases of coryza and airsac disease have been isolated and characterized for their cultural aspects, biochemical activities, specific antibodies formed against them, and their virulence in causing disease in chickens, chicken embryos, and mice. Similar studies have been made on other microorganisms found associated with H. gallinarum in diseased tissues, especially members of the genus Pasteu-rella. Whether the severe disease observed in field cases was caused by H. gallinarum alone or by a combination of agents is under investigation.
Also in this issue:Measurement of forage and sheep production on native range and pastures fertilized with nitrogen and phosphorus
Eradication of noninfectious bud-failure in almonds objective of breeding program
New variety Blanco Mariout barley may replace other varieties in some growing areas
Relationships between sprouting in chamise and the physiological condition of the plant
New strawberry varieties Fresno, Torrey, Wiltguard for California growing areas
Investigations of lygus bug damage to table beet seed plants
Response of Bartlett pear to nitrogen in California
Growth factor for influenza bacteria
Effect of aphid wing movement on virus transmission
Hard seed in range legumes
Phosphorus nutrition in annual legumes
Composition and Quality of Musts and Wines of California Grapes