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Veterinary Archives, Vol. 89 No. 3, 2019.

Original scientific paper

https://doi.org/10.24099/vet.arhiv.0245

Ultrasonographic visualization of machine milking induced teat tissue changes in Holstein Friesian × Sahiwal crossbred dairy cows

Raj S. Singh orcid id orcid.org/0000-0002-9651-7316 ; Department of Teaching Veterinary Clinical Complex, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Punjab, India
Baljinder K. Bansal ; Department of Veterinary Medicine, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Punjab, India
Dhiraj K. Gupta ; Department of Veterinary Medicine, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Punjab, India

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Abstract

The study was conducted to observe the internal post-milking teat tissue changes and to evaluate recovery to pre-milking conditions, using ultrasonography. Left-sided teats of Holstein Friesian × Sahiwal crossbred dairy cows (n = 20) were scanned six times: before milking, immediately after milking, and at 1, 2, 3, and 4 hours after milking. Absolute and relative changes of teat canal length (TCL), teat diameter (TD), teat wall thickness (TWT) and teat cistern diameter (TCD) were measured. Machine milking significantly (P<0.001) affected all the measured teat parameters. There was a lengthening of the teat canal (19 - 25%), widening of the TD (19 - 20%), thickening of the teat wall (26 - 36%) and narrowing of TCD (51 - 52%). The time taken for the teats to return to their pre-milking state was significantly affected by teat position. The TWT, TCL and TD were recovered at 3 to 4 hours in the left front teats. In left hind teats, only TWT was recovered at 4 hours of milking. The deviations were highest immediately after milking for TD and TCD, and at 1 h after milking for TCL and TWT. We concluded that the time period of 4 hours is not sufficient for the complete recovery of the teats to the pre-milking state in Holstein Friesian × Sahiwal crossbred dairy cows.

Keywords

Sahiwal cow; teat tissue; teat recovery; ultrasonography; machine milking

Hrčak ID:

222686

URI

https://hrcak.srce.hr/222686

Publication date:

12.7.2019.

Article data in other languages: croatian

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