 He was able to recommend control measures but stressed that early diagnosis by the clinician, confirmed by laboratory analysis, was important if hygiene and isolation measures were to be successful.Further investigations carried out by Josland lead to the isolation, in New Zealand, of the Salmonella organism from all species of farm animals, from watering holes, and from pastures contaminated by infected faeces of such animals, and he showed, in a series of comprehensive field studies, that the organism when deposited in dung, water or pasture, could remain viable for periods ranging up to twenty-eight weeks.Josland also found that the survival of Salmonella was less on pasture exposed to sun compared to shaded pasture.