[[Image:woodentongue2.gif|right|thumb|125px|<small><center>'Sulpher body' of Actinobacillosis (Courtesy of Alun Williams (RVC))</center></small>]]
[[Image:woodentongue2.gif|right|thumb|125px|<small><center>'Sulpher body' of Actinobacillosis (Courtesy of Alun Williams (RVC))</center></small>]]
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The tongue is changed to fibrous stroma with raised red nodules (2-3mm across)along the surface. This lesion is a pyogenic ganuloma containing large numbers of the bacterial rods which look like sulphur granules.
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Histologically the tongue becomes fibrous stroma with raised red nodules (2-3mm across)along the surface. This lesion is a pyogenic granuloma containing large numbers of the bacterial rods which look like sulphur granules.
This type of lesion is caused by the host response to the pathogen, rather than directly a pathogen effect.
This type of lesion is caused by the host response to the pathogen, rather than directly a pathogen effect.
Small granulomatous lesions containing 'sulphur granules' of large numbers of gram-negative rods
Small granulomatous lesions containing 'sulphur granules' of large numbers of gram-negative rods
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microcolonies surrounded by clublike spicules of calcium phosphate, giving the appearance of sulfur granules