J. Nguhiu-Mwangi; P.M.F. Mbithi; J.K. Wabacha; and P.G. Mbuthia. Sole haemorrhage is the most diagnostic sign of subclinical and chronic laminitis in cattle.Bull. Anim. Hlth. Prod. Afr. 2006 special

Citation:
Nguhiu-Mwangi J, Mbithi PMF, Wabacha JK, Mbuthia PG. J. Nguhiu-Mwangi; P.M.F. Mbithi; J.K. Wabacha; and P.G. Mbuthia. Sole haemorrhage is the most diagnostic sign of subclinical and chronic laminitis in cattle.Bull. Anim. Hlth. Prod. Afr. 2006 special.; 2006.

Abstract:

The insidious nature of laminitis makes it difficult to diagnose early enough. In most cases diagnosis is made after the condition has devastated the claw irreversibly with inevitable consequences of culling the animal. A study to determine prevalence and risk factors of laminitis was conducted on 300 dairy cows in 29 zero-grazed and 3 pasture-grazed farms within Nairobi and the peri-urban districts between December 2005 and May 2006. Locomotion score was made by walking the cows on unyielding surface to evaluate gait and straightness of the back. After washing the hind claws of each cow, they were grossly examined for any sign of claw lesions. A 1-2mm layer of horn was trimmed-off from the soles of these claws and the soles scrutinized for underlying signs of laminitis. Each weight-bearing surface of the claw was divided into 6 universally recognized zones. The prevalence of subclinical and chronic laminitis was 49.3% and 21% respectively. Claw deformities were observed in 47% of the cows but may all not have been associated with laminitis. Signs and lesions on the claws suggesting presence of laminitis but could also occur independent of laminitis were: horizontal ridges of the claw wall, sole and heel erosions, double soles and white line separation. It was observed that 82% of the cows with subclinical and chronic laminitis had sole horn haemorrhages. However, all the cows with sole haemorrhages had either subclinical or chronic laminitis. But all the cows with subclinical laminitis had haemorrhages. This implies that sole haemorrhage is mainly a good sign of subclinical laminitis. The number of zones involved determined severity of the haemorrhages. There was significant association at 95% CI between sole haemorrhage-score and number of haemorrhagic zones in which subclinical laminitis was associated with slight to moderate haemorrhages (score 1 and 2

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