One of the foremen at a pig farm notices purple sores on one of his workers.The worker has not been feeling well for the past two weeks,so the foreman sends him to the doctor.The doctor takes scrapings from the sores and sends them to the laboratory for a culture and sensitivity.The Gram stain shows 3+ thin,gram-positive rods that have filaments.The culture plates were examined the next day and revealed nonhemolytic,pinpoint,transparent colonies.What is the most likely pathogen?

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E.rhusiopathiae is the only species in the genus.It is a gram-positive,nonsporulating,pleomorphic rod that has a tendency to form long filaments.It is found worldwide and is a commensal or a pathogen in a very wide variety of vertebrates and invertebrates.Domestic swine are the major reservoir.Erysipeloid is a localized skin infection that resembles streptococcal erysipelas.The infected area is painful and swollen and gives rise to a characteristic lesion-a sharply defined,slightly elevated,purplish red zone that spreads peripherally as discoloration of the central area fades.Low-grade fever,arthralgia,lymphangiitis,and lymphadenopathy may occur.

One of the Foremen at a Pig Farm Notices Purple