Congenital myopathy in Braunvieh × Brown Swiss calves

Congenital Myopathy in Japanese Black Calves

“…The histological features of the present myopathy and age of onset are similar to the congenital myopathy of Braunvieh x Brown Swiss calves [7]. However, in congenital myopathy of Braunvieh × Brown Swiss calves, extensive replacement of muscle with fat is not seen and internally placed nuclei are not arranged in rows [7], unlike the present myopathy.…”

“…Congenital myopathy in cattle was reported in the Braunvieh x Brown Swiss calves [7]. It was reported that myopathy had shown rapidly progressive muscular weakness, becoming recumbent within two weeks of birth [7]. The histological features of the present myopathy and age of onset are similar to the congenital myopathy of Braunvieh x Brown Swiss calves [7].…”

“…In cattle, a comparative study of these myopathies has been reported in Braunvieh x Brown Swiss calves, Jersey calves, MeuseRhine-Yssel cattle and Holstein-Friesian cattle [7]. A suspected hereditary myopathy was reported in Jersey calves that had developed kyphosis [10].…”

“…A congenital dystrophy-like myopathy has been reported in a single Friesian calf, which showed progressive weakness from birth [8]. Primary skeletal muscle disorders affecting Braunvieh x Brown Swiss calves have been reported as a congenital myopathy without any central nervous system (CNS) disorders [7].…”

“…The present cases seem to be classified as congenital myopathy based on pathological alterations and age of onset. Congenital myopathy in cattle was reported in the Braunvieh x Brown Swiss calves [7]. It was reported that myopathy had shown rapidly progressive muscular weakness, becoming recumbent within two weeks of birth [7].…”