Aspectos histopatológicos da ossificação endocondral nas osteodistrofias de bubalinos.

Abstract

The costochondral junction of the 11º rib and left metacarpus of 71 growing buffalos from Marajó Island were surveyed in order to determine the pathological processes of epiphyseal growth plate — EGP. Two groups of buffaloes were defined based on clinical and anatomical pathological analyses: animals with no clinical evidence of osteodistrophy (1) and animals with evidence of osteodistrophy (2). Histological analyses showed that 1,56% of the cases recorded were of endochondral inactivity. EGP proliferations and projections in the metaphyses occurred in 40.85% of cases, with 14.29% in animals with no clinical evidence of osteodistrophy and 26.56% in animals with clinical evidence. The EGP vascular invasion with broad vascular spaces and spicules of thin and irregular cartilaginous matrix occurred in 14.29% and 43.75% of the animals without and with evidence of osteodistrophy, respectively. The pathological profile of EGP proliferation and projection in the metaphyses was compatible with nutritional rickets described in bovines. Abnormal invasion of vessels demonstrated that osteogenesis had occurred.