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Summary
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.
References
- The Dissemination of Human Pathogenic Streptococci through the Cow's Udder.Jour. Bact. 1935; 29: 42-43
- 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
- Bovine Mastitis. II. The Production of Mastitis by the Suction of Streptococci into the Duct of the Teat.Cornell Vet. 1937; 27: 309-316
Article info
Publication history
Received:
October 6,
1941
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Copyright
© 1942 American Dairy Science Association. Published by Elsevier Inc.
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