| egg drop syndrome, 1976 (eds'76). | a description is given of the new clinical condition in fowl now known as eds 76. this is characterised by the production of thin shelled, soft shelled and shell less eggs by apparently healthy birds. the effects on egg production are seen around 30 weeks of age and are seen either as an apparent fall in production or as a failure to obtain predicted production targets. haemagglutinating viruses have been isolated from these flocks and evidence from experimental and field investigations suggest ... | 1979 | 227136 |