Microstructure of Holstein and Gir breed adult bovine hooves: histomorphometry, three-dimensional microtomography and microhardness test evaluation
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Data
2015
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Resumo
This study aimed to characterize and compare the aspects involved in the microstructural formation of the
Holstein and Gir breed hoof wall by histomorphometry, three-dimensional microtomography and
microhardness test techniques. Seventy-two (18H/18G thoracic and 18H/18G pelvic) Holstein (H) and
Gir (G) breed hooves were collected in slaughterhouses. The hooves were divided into six groups
according to breed and age group: 24 to 36 months (C1H/C1G), 36 to 60 months (C2H/C2G) and over 60
months (C3H/C3G). The normality and homogeneity analysis of morphometric variables by the
Kolmogrov-Sminov and Bartlett tests was conducted as a statistical model. Once the assumptions were
met, the Sigmastat 3.5 software was used and the means were compared by T test. The 5% probability
level is considered. When the assumptions were not met, the means were compared by the Mann-Whitney
nonparametric test, considering the 5% probability level. When comparing the Holstein and Gir breeds,
no differences were noticed between them as to the length of the dermal papillae; young animals showed
thicker papillae than adult animals; the Holstein breed hooves showed higher amount of 7pores on the
wall and on the sole compared to the Gir breed; Holstein cattle hooves showed greater microhardness
than Gir cattle; there was no microhardness difference between pigmented and non-pigmented hooves of
Holstein and Gir cattle.
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Diseases of cattle, Digits, Three-dimensional microtomography, Dermal papillae, Podiatry, doenças de bovinos, Dígitos, Microtomografia tridimensional, Papilas dérmicas, Podologia
Citação
RABELO, R. E.; VULCANI, V. A. S.; SANT'ANA, F. J. F.; SILVA, L. A. F.; ASSIS, B. M.; ARAÚJO, G. H. M. Microstructure of Holstein and Gir breed adult bovine hooves: histomorphometry, three-dimensional microtomography and microhardness test evaluation. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 67, n. 6, p. 1492-1500, 2015.