Studies on Hereditary Nervous Disorder in the Gifu Native Fowl

Hereditary hypothyroidism in the domestic fowl.

OPULATIONS of fully pedigreed chickens often contain individuals which ’deviate considerably in one or more respects from the average for the flock. When pedigrees reveal close genetic relationship among those similarly affected, further studies are warranted. Such was the case for the trait now recognized as hypothyroidism. Affected 5 %-month old White Leghorn pullets, which were somewhat smal...

An Hereditary Complex in the Domestic Fowl.

Brachydactyly, syndactyly, and leg-feathering or ptilopody‘ are among the many characteristics of the domestic fowl that have been studied from the standpoint of genetics. The last in particular, owing to its widespread occurrence, has aroused especial interest. Its heredity has been investigated by HURST (1905), DAVENPORT (1909), and more recently by PUNNETT and BAILEY ( 1918). The genetic beh...

Studies on Fowl Leukosis

Following the observations on high-speed centrifugation of the avian sarcoma agent by various investigators,1' 8,10,11,12 similar studies of the agent of fowl leukosis have been undertaken. Since the neoplastic nature of this disease is now rather generally recognized, observations on the filterable agent of chicken leukosis have assumed new significance for the study of the etiology of fowl ne...

"Ataxia," a Hereditary Nervous Disorder of the Rabbit.

Preliminary Studies on Fowl Cholera in Layers

Pasteurella multocida the etiological agent of fowl cholera was isolated from 16 layer flocks in and around Faisalabad. The flocks ranged in age from 18-24 weeks. Increased mortality and considerable drop in egg production were the main clinical signs in all affected flocks. Bacterial isolation and identification was conducted on the basis of cultural, morphological and biochemical characterist...