Research-Article| Volume 25, ISSUE 2, P155-160, February 1942

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The Anatomy and Physiology of the Teat Sphincter*

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      No evidence was obtained to indicate that a negative pressure develops at the external orifice of the teat when the pressure of milking is released.
      With machine milked cows there is a greater danger of injury to the teat sphincter than with hand milked cows. A teat whose sphincter becomes eroded at the external orifice seems to offer a greater opportunity for infection of that quarter than one which shows no erosion.


        • Davis D.J.
        The Dissemination of Human Pathogenic Streptococci through the Cow's Udder.
        Jour. Bact. 1935; 29: 42-43
        • Johnston Thomas
        Anatomical and Experimental Study of the Teat of the Cow with Particular Reference to Streptococcal Mastitis.
        Jour. Compar. Path, and Ther. 1938; 51: 69-77
        • Little R.B.
        Bovine Mastitis. II. The Production of Mastitis by the Suction of Streptococci into the Duct of the Teat.
        Cornell Vet. 1937; 27: 309-316