Urolithiasis and kidney disease as causes of significant mortality in fowls were investigated in two flocks of commercial laying birds on farms where outbreaks had occurred previously. The investigation, covering the first 10-11 months of egg production, included macroscopic and histological examination of individual cases of the disease, biochemical studies on blood samples collected at regular intervals from marked birds and the analysis of feed samples taken at the same time. The aetiology and pathogenesis of the condition was not established and the various investigations carried out did not reveal any consistent features. The possibility of an association between infectious bronchitis virus and the pathological entity described in the paper is discussed.
The effect of voluntary wing movements was studied in 61 broiler breeder hens, 6 adult light weight layer fowls and 5 young turkeys. It was shown that two relatively brief episodes of voluntary wing beats caused severe acute necrosis of the supracoracoid muscles in all 5 turkeys, in 73% of caged and 40% of penned broilers; the light breed of fowls was not susceptible. These findings are discussed in relation to the pathogenesis of the spontaneously occurring deep pectoral myopathy of turkeys and broilers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.