Radiographic features oflaminitic claws of dairy cows around Nairobi

Citation:
J. Nguhiu-Mwangi, P M F. Mbithi' WMJKPG. "Radiographic features oflaminitic claws of dairy cows around Nairobi." A Journal of the Kenya Veterinary Association. 2007.

Abstract:

The objective of the study was to determine the common radiographic features in laminitic claws
from dairy cows using abattoir samples. A total of 192 claws were collected from Wangige slaughter
slab and 126 claws from Kiserian abattoir. The claws were examined for gross lesions. Dorso-palmar/
dorso-plantar and lateral radiographic exposures of each clawwere taken and evaluated for radiographic
changes. Subclinical and chronic laminitis was respectively present in 35% and 21% of the claws
examined and 44% of the claws showed extreme deformities. Concurrent appearance oflesions was in
2~Al ofthe claws.Radiographic changes were observed in the pedal bones but not in the adjacent joints.
Dilated vascular channels (61%) and prominently visible non-dilated vascular channels (24%) in the
pedal bones were observed in subclinical and chronic laminitis. The most frequently observed radiographic
changes in pedal bones were: irregular (serrated) margins (14%), exostoses (8%), and narrowing (6%),
complete absence (3%) or partial absence (1%) of its apex.Other changes on the pedal bones were: rotation
(4%), "dropping (sinking)" (3%), fissure fractures (2%), periostitis (1%) and osteolysis (1%). Most of
these radiographic changes were seen in claws that had chronic laminitis with extreme deformities. It
is concluded that radiographic changes in laminitis occur during the chronic phase and are most severe
when concurrent extreme deformities of the claws are present.

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