Brucella abortus in fresh cream and cream products.

Case 203.-Born in 1911. Started work as a carrier in 1924 for a firm loading lime, cement, tea, and sugar. In 1926 moved to work as storeman to a builder's merchant. Again exposed to lime and cement dust. From 1936 to 1964 worked principally as a plasterer. The histology of this tumour is not known. He never took snuff. Case 204.-Born in 1898. After working as a packman's boy (1910-12) and an apprentice slaughterer (1912-14), and serving in the Army (1914-17), he worked as a labourer for grain merchants (1917-36) and was exposed to the dust of cereals and beans. From 1946 to 1961, when an anaplastic carcinoma was diagnosed, he worked in the quarry of a cement works but was not much exposed to dust. He never took snuff. Case 205.-Born in 1896. Started work as a baker's assistant in 1908 and was exposed to flour dust until he left to work at an Army depot in 1914. After service in Army worked at a power station unloading coal trucks (1919-25) and later as boilerman, stoker, and storeman (1925-60), when he was exposed to coal dust and ash. A transitional cell tumour was diagnosed in 1960. He never took snuff.