. Pure milk and the public health; a manual of milk and dairy inspection. Milk; Milk. CHAPTER I. THE CONTAMINATION OF MILK. Udder. Milk comes in contact with bacteria in the lactif- erous ducts of the udder at the moment of secretion. The normal healthy udder of the cow harbors bacteria throughout its whole extent. Fig. 1 shows the extent of the lactiferous ducts of the udder and the direct com- munication with the ori- fice of the teat. There was current at one time a belief that the interior of the udder is sterile, except, perhaps, the teats, and that failure to obtain sterile samples of mi
. Pure milk and the public health; a manual of milk and dairy inspection. Milk; Milk. CHAPTER I. THE CONTAMINATION OF MILK. Udder. Milk comes in contact with bacteria in the lactif- erous ducts of the udder at the moment of secretion. The normal healthy udder of the cow harbors bacteria throughout its whole extent. Fig. 1 shows the extent of the lactiferous ducts of the udder and the direct com- munication with the ori- fice of the teat. There was current at one time a belief that the interior of the udder is sterile, except, perhaps, the teats, and that failure to obtain sterile samples of milk was due to con- tamination from bacteria in the teats, or from ex- ternal sources. Moore (41) suggested the method of attacking the problem by the bacterio- logical examination of the normal udders of re- cently slaughtered cows. The results obtained by this method of investi- gation (42, 44, 66, 67) diametrically opposed current belief and have led numerous workers to repeat the experiment. Fi^. 1. Section of one quarier of the udder of a coi-i< at a plane intersecting the teat and milk cistern. Photograph bv the author, from a museum specimen prepared by Dr. G. S. Hopkins. Digitized by Microsoft®. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, Archibald Robinson, 1875-; Jaffa, Myer Edward, 1857-1931. Ithaca, N. Y. , Taylor & Carpenter
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Keywords: ., bo, bookcentury1900, bookdecade1900, booksubjectmilk, bookyear1909
