| a survey of salmonella enteritidis in spent hens and its relation to farming style in hokkaido, japan. | in order to estimate the distribution of salmonella including salmonella enteritidis (se) and se-antibodies in commercial layer hen flocks in hokkaido, the northern prefecture of japan, a survey of spent layer hens was performed, from august 1996 to january 1997. from the three spent hen processing plants, samples of intestines and sera were collected from 740 birds presented for slaughter from 37 flocks of 22 layer hen farms. intestines from each birds were cultured for salmonella including sal ... | 1997 | 9506274 |