Ultrasonographic assessment of the teat cistern volume following ovalbumin infusion.

<p><b>(</b>A) Graph representing the evolution of the teat cistern volume (mean values from 10 responders and 4 low responders, ± standard deviations) relative to T0 (before ovalbumin infusion) showing a significant reduction of the teat cistern volume 14 hours after ovallbumin infusion into teat cisterns of high-responder cows (*p<0.05); (B) Ultrasounds photographs representing an ovalbumin-infused teat before infusion; (1): the cistern is filled with liquid (milk) therefore weakly echogenic; (2) 14 hpi, there was a thickening and permeabilization of the wall of the teat (inflammation) reducing the cistern volume. The white dashed line represents the initial position of the cistern wall; (3) 96 hpi, the teat has regained its original appearance. The bar represents 1 cm.