Vetch toxicosis in cattle grazing Vicia villosa ssp dasycarpa and V benghalensis

Abstract

The epidemiological, clinical and pathological features of a disease syndrome in adult cattle grazing woolly-pod vetch (Vicia villosa ssp dasycarpa) or popany vetch (V benghalensis) are reported. Outbreaks of toxicosis occurred between midwinter and midsummer in 3 dairy and 6 beef herds on the north coast of New South Wales, between 1982 and 1992. Friesian, Angus, Murray Grey, Guernsey and Hereford breeds were affected. Mean morbidity and case fatality rates in affected herds were 7% (65 of 889) and 69%, respectively. Signs of pruritic dermatitis, illthrift and death were associated with an eosinophilic granulomatous inflammation of many organs, particularly involving the renal cortex, dermis, myocardium, adrenal glands, lymph nodes and hepatic portal triads.

An Outbreak of Systemic Granulomatous Disease in Cows with High Milk Yields

“…Granulomatous inflammation with multinucleated giant cells was severe in the spleen and kidneys, and was mild to moderate in the liver, heart, lymph nodes and skin. These tissue lesions and their distributions were most similar to those seen in cases of suspected citrus pulp toxicosis [11] and hairy vetch toxicosis [2,4,5,7,9,10]. In DUIB toxicosis [6], the liver, heart, kidneys, and salivary glands have similar lesions to those seen here, but the spleen had only atrophic white pulp or mild hyperplasia of the epithelioid cells.…”

“…However, the clinical course of the disease was similar to that of hairy vetch toxicosis and to that of the suspected citrus pulp toxicosis reported earlier, as in all instances the outbreak of disease was observed in lactating cows over 3 years old, and the disease had a low morbidity rate (8%) and a high mortality rate (43%), as well as the pathological similarities mentioned above [4,6,10,11].…”

Doença granulomatosa sistêmica em bovinos no estado de Santa Catarina associada ao pastoreio de ervilhaca peluda (Vicia villosa)

“…As lesões de pele associadas à forma granulomatosa da intoxicação por ervilhaca variam com o estágio da doença e incluem dermatite papular, ulcerativa ou exsudativa (Odrizola et al, 1991;Harper et al, 1993), espessamento cutâneo e, por fim, alopecia (Odrizola et al, 1991;Fighera et al, 2005).…”

“…As lesões de pele associadas à forma granulomatosa da intoxicação por ervilhaca variam com o estágio da doença e incluem dermatite papular, ulcerativa ou exsudativa (Odrizola et al, 1991;Harper et al, 1993), espessamento cutâneo e, por fim, alopecia (Odrizola et al, 1991;Fighera et al, 2005).O objetivo deste trabalho foi descrever dois casos de intoxicação espontânea por ingestão de pastagem contaminada por ervilhaca peluda (Vicia villosa) no planalto norte de Santa Catarina, em vacas da raça Holandesa e cruzadas Holandês e Jersey.Recebido em 18 de março de 2011 Aceito em 12 de julho de 2011 E-mail: z62memer@uco.es Os dados epidemiológicos e clínicos foram obtidos durante visita às propriedades. Foi realizada a necropsia nos três animais afetados.…”

“…A forma mais comum de apresentação desta intoxicação é uma dermatite acompanhada de doença granulomatosa sistêmica, com morbidade entre 1 e 68% e mortalidade entre 50 e 100% (Panciera et al, 1992;Fighera e Barros, 2004). As lesões de pele associadas à forma granulomatosa da intoxicação por ervilhaca variam com o estágio da doença e incluem dermatite papular, ulcerativa ou exsudativa (Odrizola et al, 1991;Harper et al, 1993), espessamento cutâneo e, por fim, alopecia (Odrizola et al, 1991;Fighera et al, 2005).…”