Ulcerative mamary dermatitis at dairy cows – etiology, prevalence, gross pathology and staging
2024
Toholj, Bojan | Spasojević, Jovan | Kureljušić, Branislav | Galić, Ivan | Zahirović, Nedim
Ulcerative mammary dermatitis (UMD) also known as udder cleft dermatis first has been observed in England. Clinically it can be describet as a mammary skin disease which causes moist udder sores with foul smelling, very smilar to digital dermatitis (DD) lesins. Typical localization of UMD is a skin between the forequarter and abdominal wall, but it can also be found at the lower part of forequarter skin between papilas. Samples were collected from s Holstein Friesian dairy herd with recurrent cases of DD. The animals were kept in loose house systems with slatted and element floor. The clinical examination was performed during milking parlour using a lighted mirror device for easy acces and view. Tissue samples was taken from different stages of UMD, and fixed in formalin, and stained HE and WS. We also employed a PCR analysis to determine a Treponema presence in tissue samples. The prevalence of UMD was 4,3%, and always at milking cows, and no case at dry cows. We found all stages of this disease. Patohistological analyisis reveal epidermal thickening, paraceratosis, neutrophil infilitration, WS staining reveals a presence of spiral microorganisms in deep skin layers at lesion. In conclusion UMD can be determined as multifactorial disesase but with important role of Treponemas. Patohistology is characteristic and WS staining can reveal presence of spiral bacteria (Treponemas) in deep layers. Milking cows are more proun to develop this disease than dry cows.
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Información bibliográfica
Editorial Poljoprivredni fakultet, Novi Sad, Departman za veterinarsku medicinu
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