User contributions
21 August 2013
File:IPLab10Candidiasis5.jpg
This higher-power photomicrograph shows the yeasts and pseudohyphae in this focus of Candida organisms.
File:IPLab10Candidiasis4.jpg
This is a low-power photomicrograph of one of the Candida colonies from this lymph node. The chains of yeast which are termed "pseudohyphae" are apparent at this magnification.
File:IPLab10Candidiasis3.jpg
This is a low-power photomicrograph of lymph node with three prominent areas of Candida colonies (arrows). Even at this low magnification, the purple-staining yeast and pseudohyphae can be easily seen. This section was stained with Periodic Acid-Schiff...
File:IPLab10Candidiasis2.jpg
This photograph of the cut surface of these kidneys shows that these multifocal punctate lesions are primarily in the cortex (arrows).
File:IPLab10Candidiasis1.jpg
This autopsy photograph of the kidneys demonstrates the multifocal punctate lesions visible on the serosal surface (arrows). Don't confuse these small yellow punctate lesions with the fat that is adherent to the renal capsule.
IPLab:Lab 9:Actinomycosis
Created page with "== Images == <gallery heights="250px" widths="250px"> File:IPLab9Actinomycosis1.jpg|This is a low-power photomicrograph of the retroperitoneal abscess. At this magnification, ..."
File:IPLab9Actinomycosis5.jpg
This is a high-power photomicrograph of an actinomycotic colony. The filamentous nature (arrows) of the actinomyces organisms is more easily appreciated at this power.
File:IPLab9Actinomycosis4.jpg
This is an even higher-power photomicrograph of actinomycotic colonies in the abscess. The filamentous nature (arrows) of the actinomyces organisms in these colonies can be appreciated.
File:IPLab9Actinomycosis3.jpg
This is a higher-power photomicrograph of actinomycotic colonies in the abscess.
File:IPLab9Actinomycosis2.jpg
This is a higher-power photomicrograph of an abscess demonstrating a pocket of purulent exudate that contains numerous actinomycotic colonies (arrows).
File:IPLab9Actinomycosis1.jpg
This is a low-power photomicrograph of the retroperitoneal abscess. At this magnification, multiple dark-staining foci can be appreciated. These foci are Actinomyces colonies (arrows). These colonies are known as "sulfur granules" because in gross spec...
IPLab:Lab 9:Clostridial Myonecrosis
Created page with "== Images == <gallery heights="250px" widths="250px"> File:IPLab9Clostridium1.jpg|This gross photograph of the lower extremity was taken at autopsy. Notice the swelling and th..."
File:IPLab9Clostridium7.jpg
This is a high-power photomicrograph of a tissue section stained with a tissue Gram's stain (Brown & Brenn). The Gram-positive bacilli can be seen throughout this tissue section.
File:IPLab9Clostridium6.jpg
This higher-power photomicrograph of the previous image provides a clearer view of gas bubbles in the tissue, the necrotic hypereosinophilic muscle cell (1), and the mild inflammatory reaction (2). At this magnification, the bacteria located throughout...
File:IPLab9Clostridium5.jpg
This high-power photomicrograph shows the gas accumulation present in the tissue, a necrotic muscle cell (1), and a mild inflammatory response (2). There is also a thrombosed blood vessel (3). The blue-staining rods (bacterial organisms) can barely be ...
File:IPLab9Clostridium4.jpg
This is a high-power photomicrograph of skeletal muscle. The muscle cells are hypereosinophilic and most do not contain nuclei, indicating that these cells are dead or dying. The round clear spaces (1) in this tissue correspond to gas accumulations pri...
File:IPLab9Clostridium3.jpg
This is a low-power photomicrograph of muscle fascicles containing large gas bubbles (arrows). Note that there is no inflammatory reaction in this section.
File:IPLab9Clostridium2.jpg
This gross photograph shows a close-up view of hemorrhagic blebs (arrows) on the skin. The blebs on the skin are accumulations of gas being discharged into the tissues from the Clostridium perfringens. This gas produces crepitance.
File:IPLab9Clostridium1.jpg
This gross photograph of the lower extremity was taken at autopsy. Notice the swelling and the area of the primary infection (arrow).
IPLab:Lab 9:ARF
Created page with "== Images == <gallery heights="250px" widths="250px"> File:IPLab9ARF1.jpg|This is a gross photograph of mitral valve demonstrating marked thickening and fibrosis of the valve ..."
File:IPLab9ARF6.jpg
This high-power photomicrograph of myocardium shows the cellular detail of another Aschoff body. In this case there appears to be a multinucleated Aschoff giant cell (arrow).
File:IPLab9ARF5.jpg
This high-power photomicrograph of myocardium shows the cellular detail of an Aschoff body. Aschoff bodies are foci of fibrinoid necrosis surrounded by lymphocytes, macrophages, an occasional plasma cell, and plump “activated” histiocytes called An...
File:IPLab9ARF4.jpg
This is a higher-power photomicrograph of myocardium containing Aschoff bodies (arrows) within the interstitium.
File:IPLab9ARF3.jpg
This is a higher-power photomicrograph of myocardium showing cellular accumulations--Aschoff bodies (arrows)--within the interstitium of the myocardium. These are found especially around blood vessels.
File:IPLab9ARF2.jpg
This is a low-power photomicrograph of heart tissue. Little can be seen at this magnification, except that the tissue looks relatively normal.
File:IPLab9ARF1.jpg
This is a gross photograph of mitral valve demonstrating marked thickening and fibrosis of the valve leaflet. There are also numerous foci of fibrinoid necrosis within the cusps and friable vegetations (verrucae) along the lines of closure (arrows). Th...
IPLab:Lab 9:Diphtheria
Created page with "== Images == <gallery heights="250px" widths="250px"> File:IPLab9Diphtheria1.jpg|This is a low-power photomicrograph of the trachea with the diphtheritic membrane (1), which h..."
File:IPLab9Diphtheria4.jpg
In this higher-power photomicrograph of the tissue from the previous image, the ulcerated tracheal mucosa and the diphtheritic membrane are more clearly seen. Although difficult to make out at this magnification, most of the cells in this inflammatory ...
File:IPLab9Diphtheria3.jpg
This is an even higher-power photomicrograph of the tracheal mucosa and the diphtheritic membrane. The mucosal surface of the trachea is ulcerated (total loss of epithelial cells) and the only remaining epithelial cells are found in the glands (arrows)...
File:IPLab9Diphtheria2.jpg
This is a higher-power photomicrograph of trachea with the diphtheritic membrane (1). Even though, the main part of the membrane has pulled away from the tracheal lining during histological processing, in this section part of the membrane is still loos...
File:IPLab9Diphtheria1.jpg
This is a low-power photomicrograph of the trachea with the diphtheritic membrane (1), which has pulled away from the tracheal lining during histological processing. Note the tracheal cartilage (2) present in this section.
IPLab:Lab 9:Bacterial Meningitis
Created page with "== Images == <gallery heights="250px" widths="250px"> IPLab9BacterialMeningitis1.jpg|This gross photograph of the autopsy specimen from this case demonstrates the purulent exu..."
File:IPLab9BacterialMeningitis8.jpg
This photomicrograph of brain tissue demonstrates diffuse edema.
File:IPLab9BacterialMeningitis7.jpg
This is a high-power photomicrograph of exudate from the leptomeninges which has been Gram-stained. Note the Gram-negative bacteria (arrows) throughout this section.
File:IPLab9BacterialMeningitis6.jpg
This is a high-power photomicrograph of a blood vessel from the previous image. The vessel is surrounded by neutrophils (arrows).
File:IPLab9BacterialMeningitis5.jpg
This is a higher-power photomicrograph of inflammatory exudate in a sulcus. The majority of cells in this exudate are neutrophils. There is also abundant fibrin (arrows) and red blood cells are present in the congested vessels.
File:IPLab9BacterialMeningitis4.jpg
This higher-power photomicrograph of a sulcus shows the congested vessels and the inflammatory exudate in the leptomeninges.
File:IPLab9BacterialMeningitis3.jpg
This is a higher-power view of a congested blood vessel. Inflammatory exudate is present within the vessel and throughout the leptomeninges.
File:IPLab9BacterialMeningitis2.jpg
This is a low-power photomicrograph of brain section. Note the exudate (1) in the meninges and congestion of the vessels (2) in the leptomeninges.
File:IPLab9BacterialMeningitis1.jpg
This gross photograph of the autopsy specimen from this case demonstrates the purulent exudate (arrows) in the leptomeninges.
IPLab:Lab 9:RMSF
Created page with "== Images == <gallery heights="250px" widths="250px"> File:IPLab9RMSF1.jpg|This is a low-power photomicrograph of the skin biopsy. Note areas of hemorrhage (arrow) in the derm..."
File:IPLab9RMSF8.jpg
This is a high-power photomicrograph of a thrombosed vessel in the dermis. Note that the endothelial cells are missing along part of the circumference of the vessel (arrows)--this is where the main part of the thrombus has attached. Also note the infla...
File:IPLab9RMSF7.jpg
This is a high-power photomicrograph of a dermal vessel (arrow) which is exhibiting vasculitis and thrombosis.
File:IPLab9RMSF6.jpg
This is a high-power photomicrograph of severe vasculitis in the dermis.
File:IPLab9RMSF5.jpg
This is a photomicrograph of dermis with an area of more severe vasculitis (arrow).
File:IPLab9RMSF4.jpg
This is a higher-power photomicrograph of a dermal vessel with mild vasculitis.
File:IPLab9RMSF3.jpg
This is a photomicrograph of a small vessel in the dermis which is demonstrating mild vasculitis.
File:IPLab9RMSF2.jpg
This is a higher-power photomicrograph demonstrating areas of hemorrhage immediately underneath the epidermis. Also note the cellularity and thrombosis of the small vessels in the dermis (arrow).
File:IPLab9RMSF1.jpg
This is a low-power photomicrograph of the skin biopsy. Note areas of hemorrhage (arrow) in the dermis.
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