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Teat Canal Diameter and Other Cow Factors with Possible Influence on Somatic Cell Counts in Cow Milk

Spenekanaldiameter og andre kufaktorer med mulig innvirkning på det somaliske celletallet i kumelk


A case-control study on matched pairs of cows in 2 counties of Norway indicated a strong positive association between teat canal diameter (TCD) and somatic cell count (SCC) in milk. The study indicated further a highly significant association between leakage of milk and high SCC and a significant association between teat injury and high SCC. Finally, an association between the shape of the teat end and SCC that was nearly significant (p =.067) when considered in isolation, was shown to exist through it's dependency on TCD. A flat or inverted teat end is associated with a large TCD while a pointed or round teat end tends to have a smaller TCD.


Data til en ”case-control” studie ble samlet høsten 1982 og våren 1983 i to fylker i Norge for å undersøke sammenhengen mellom nærmere definerte kufaktorer og det somatiske celletallet i melk.

1 tillegg ble det samlet data for 34 ”cases” og 48 kontrollkyr i California våren 1984.

Det norske forsøket viste en sterk positiv sammenheng mellom spenekanaldiameter og celletallet i melk. Videre var det en positiv sammenheng mellom lekkasje og høyt celletall, og mellom speneskader og høyt celletall i melka.

Forsøket i California viste samme sterke sammenheng mellom vide spenekanaler og høyt celletall i melka som ved det norske. I tillegg viste dette forsøket at resultatet ble det samme hvis en benyttet bakteriologiske undersøkelser av enkeltspeneprøver som avhengig variable i stedet for det somatiske celletallet.


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Mr. Rolf Bjerke-Larssen of the National Veterinary Institute is cordially thanked for his kind assistance in planning this study.

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Jrstad, A., Farver, T.B. & Riemann, H. Teat Canal Diameter and Other Cow Factors with Possible Influence on Somatic Cell Counts in Cow Milk. Acta Vet Scand 30, 239–245 (1989).

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  • case-control study
  • matched pairs
  • mastitis
  • teat injury