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**Larger in acute IE. | **Larger in acute IE. | ||
Image: | ===Image=== | ||
<gallery> | |||
Image:Haemophilus parainfluenzae Endocarditis PHIL 851 lores.jpg | Infective endocarditis. | |||
</gallery> | |||
www: | |||
*[http://www.flickr.com/photos/11462589@N05/1126726482/ Infective endocarditis - aortic valve (flickr.com)]. | *[http://www.flickr.com/photos/11462589@N05/1126726482/ Infective endocarditis - aortic valve (flickr.com)]. | ||
==Microscopic== | ==Microscopic== | ||
Features: | |||
*Inflammatory infiltrate (key feature @ low power): | *Inflammatory infiltrate (key feature @ low power): | ||
**+/-Plasma cells - subacute. | **+/-Plasma cells - subacute. | ||
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*Microorganisms - '''key feature''' (diagnostic). | *Microorganisms - '''key feature''' (diagnostic). | ||
**Hard to see (even at high power). | **Hard to see (even at high power). | ||
DDx: | |||
*[[Nonbacterial thrombotic endocarditis]] - not really inflamed, dirt may mimic micro-organisms. | |||
==Stains== | ==Stains== |
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