Digital dermatitis of the accessory digits of dairy cows

作者：Rodrigues Celso A^*; Luvizotto Maria C R; Alves Ana Liz G; Teodoro Piero H M; Gregorio Elisa A

来源：Pesquisa Veterinaria Brasileira, 2010, 30(3): 246-248.

DOI：10.1590/S0100-736X2010000300010

• Dairy cattle
• accessory digit
• dewclaws
• digital dermatitis
• papillomatosis
• spirochetes

Rodrigues C.A., Luvizoto M.C.R., Alves A.L.G., Teodoro P.H.M. & Gregorio E.A.2010. Digital dermatitis of the accessory digits of dairy cows. Pesquisa Veterinaria Brasileira 30(3):246-248. Departamento de Clinica, Cirurgia e Reproducao Animal, Curso de Medicina Veterinaria, Universidade Estadual Paulista, Campus de Aracatuba, Rua Clovis Pestana 793, Aracatuba, SP 16050-680, Brazil. E-mail: [e-mail]
This report characterizes the digital dermatitis (DD) lesions in the accessory digits of dairy cows and presents data on the applied therapy. Fifteen Holstein cattle with DD affecting the accessory digits of the hindlimbs from four dairy farms with previous history of DD were evaluated. Lesions were excised, the wounds were sutured, and a topical application of oxytetracycline powder covered by bandaging was associated with a single parenteral administration of long acting oxytetracycline IM (20mg/kg). Tissue samples were obtained for histopathology and transmission electronic microscopy (TEM). Lesions from all the animals were recuperated 15 days after surgical procedure. Overal, most DD lesions were papillomatous epidermal projections or wartlike verrucous lesions. Histopathologically, samples revealed hyperplasia of epidermis with hyperkeratosis, several mitoses in the stratum basale and elongated rete ridges in the superficial and middle dermis. TEM revealed long, thin spirochete-like bacteria. Morphologic features of lesions and its response to therapy were comparable to those described for DD.

• 出版日期2010-3