| infectious agents in respiratory disease of housed, fattening lambs in northern ireland. | a two-year longitudinal, microbiological and pathological survey of respiratory disease in lambs housed for fattening at three-and-a-half to four months of age was undertaken. in the first year samples of nasal mucus and blood were taken from lambs each week for the first nine weeks after entry to a fattening unit and each week one lamb was examined post mortem. in the second year two additional fattening units were included in the survey, when samples of blood and nasal mucus were taken from la ... | 1988 | 3381463 |