author(s)
Arun Mourya, PC Shukla, DK Gupta, RK Sharma, Anju Nayak, Amita Tiwari, Brejesh Singh, AP Singh, Apra Sahi and Anand Jain

abstract
Ultrasonography is one of the modern, accurate, relatively quick, noninvasive techniques for the diagnostic method for the udder illness. The study was plane to find the alteration in subclinical mastitis in cow by ultrasonography. Udders and teats of 55 lactating cattle of livestock farm, adhartal were screened using USG, MCMT, pH and SCC. All cows were screened by contact gel and water bath technique, in which 23 cows were positive for SCM. Normal udder parenchyma revealed homogenous hypoechogenic parenchyma with interspersed anechoic blood vessel. Teat wall of cow appeared in USG screening as three fold layer structure .The gland cisterns appeared as a large homogenous anechoic area with few hypoechoic dots corresponding to the milk. The rosette of furstenberg normally appears as short hyperechoic line extending from the teat cistern into the papillary duct. Udder parenchyma of cows found positive for subclinical mastitis by MCMT and somatic cell count appeared homogenous hypoechoic with lack of clarity of visualization of milk alveoli and lactiferous duct, irregular outline of the teat canal and cistern, homogenous hypoechogenic contents and loss of three layered appearance of the affected teat wall.