"The Perfect Food and the Filth Disease: Milk-borne Typhoid and Epidemiological Practice in Late Victorian Britain" J. S. Williams. Journal of the History of Medicine and Allied Sciences Vol. 65, No. 4 (OCTOBER 2010), pp. 514-545. If anyone's interested but cannot access the article, PM me and I will send you a copy (made by print-screening the pages from 'net and assembling the images into a .doc file).

A verbose, but on the whole interesting read on an uphill battle fought in 1860-s - 1890-s to have adulterated milk recognized as public health risk. Includes a "subplot" which would make a wonderful period-drama detective story (the typhoid outbreak in London, 1873).