Images

Distribution of Chronic Wasting Disease in North America, updated April 19, 2024.

Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in Wisconsin, USA. (A) There is green-gray mucoid discharge around the eyes and the nasal planum is crusty (arrows).

Animated GIF showing changes in distribution of chronic wasting disease in North America from 2000-2023 as documented at the end of each year. Individual files of yearly maps are available at https://doi.org/10.5066/P9HQKKFO.

Tissue from a gull (Larus sp) from Wisconsin. (A) Diffusely the pericardium (star) is greatly expanded by fibrin, edema and necrotic debris (H&E). (B) Lymphoplasmacytic myositis (arrows) creating linear lesions along fascial planes of the pectoral skeletal muscle (H&E).

Distribution of Chronic Wasting Disease in North America, in Relation to Tribal Lands in the Conterminous United States. Updated on February 27, 2024.

Photomicrographs of the plagiopatagium from a Little Brown Bat (Myotis lucifugus) captured live in Wyoming, U.S.A. (A) Adult nematodes (asterisks) are present in the dermis. They are filled with larval nematodes (arrowhead). The overlying epidermis is hyperplastic (arrow). H&E stain.

Gross photographs from a Cooper’s hawk (Accipiter cooperii). (A) Air sac overlying the lung and liver have multiple yellow to green, irregular nodules (arrows). (B) Liver (asterisk) has multiple 1 mm, round to irregular, tan nodules in addition to innumerable miliary foci.

(A) Soft palate of a Cooper’s hawk (Accipiter cooperii). The submucosa is expanded by a myriad of epithelioid macrophages (arrow) surrounding multinucleated giant cells centered on a necrotic center (asterisk). H&E stain. Insert: Intrahistiocytic and extracellular acid-fast bacilli.

(A) Photomicrograph from a healthy example of elkhorn coral (Acropora palmata). Tall columnar epidermis (E), gastrodermis (g), skeletal space (s), gastrovascular cavity (gvc), and calicodermis (white arrowhead). H&E stain.

Photomicrograph at low magnification from elkhorn coral (Acropora palmata) found with multifocal tissue loss in the Dominican Republic. A flatworm (fw) is present along a multifocally ulcerated coral surface body wall (c) along one polyp. A small amount of cellular debris can be seen within the pharynx (p) of the flatworm.

Photomicrographs of from unknown species of flatworm. (A) Dorsal detail showing epidermis with rhabdites (black arrowheads) and endosymbionts visible within the flatworm parenchyma (fw).

Photographs from an elkhorn coral colony (Acropora palmata) losing tissue on a reef in the Dominican Republic. (A) Colony in situ with bright white skeleton exposed by multifocal tissue loss (arrowheads) and areas of older tissue loss with algae overgrowth (*).  (B) Submitted samples. Gross lesions are obscured by with loss of pigment with fixation.

Photographs from a Mexican Wolf (Canis lupus baileyi) euthanized due to neurologic illness in New York, USA. (A) An area of light gray discoloration is present on the surface of the left cranio-dorsal cerebrum (arrow).

Photomicrographs from a Mexican Wolf (Canis lupus baileyi) euthanized due to neurologic illness in New York, USA. (A) Most of the neoplasm consists of loosely arranged, highly vacuolated stellate cells within a variably fine fibrovascular stroma. (B) An area of necrosis (asterisk) surrounded by pseudopalisading neoplastic cells (arrows).

Photomicrographs from a Mallard Duck (Anas platyrhynchos) found dead in Missouri, U.S.A. (A) The glomerular mesangium (asterisk) is expanded by amorphous, eosinophilic, acellular material. H&E stain. (B) Tubules in medullary cones are often surrounded by amorphous, eosinophilic, acellular material. H&E stain.

Photographs from an eastern massasauga rattlesnake (Sistrurus catenatus) found lethargic in Wisconsin, U.S.A. (A) There is a 15 x 12 mm area with firm, misshapen, and discolored scales (arrows) on the ventral neck. (B) There is a 10 x 6 focal area of depression with tan to dark red scale discoloration (arrow) on the ventral body.

Photomicrographs from an eastern massasauga rattlesnake (Sistrurus catenatus) from Wisconsin, U.S.A. Periodic acid-Shiff. (A) On the ventral neck are multifocal areas of superficial to mid-epidermal necrosis (arrows). (B) Areas of necrosis often contain ~5-µm diameter branching, septate, PAS-positive fungal hyphae (arrowheads).

Photographs from a colony of boulder brain coral (Colpophyllia natans) found losing tissue in Biscayne Bay, Miami, FL, US. (A). In situ photograph. An area of prior tissue loss is covered in algal overgrowth (O), new loss is evidenced by white, bare skeleton not yet overgrown by algae (S), and intact healthy-appearing tissue is greenish brown (H).

Photomicrograph from a boulder brain coral (Colpophyllia natans) found diseased in Biscayne Bay, FL, US. There is lytic necrosis of the gastrodermis extending through the surface body wall (asterisk), and mucocyte hyperplasia with loss of gastrodermis from surface and basal body walls (black arrowheads.

Photomicrograph from a boulder brain coral (Colpophyllia natans) found diseased in Biscayne Bay, FL, US. There is multifocal lytic necrosis of the gastrodermis extending through the surface and basal body walls (asterisks), and mucocyte hyperplasia with loss of gastrodermis from surface and basal body walls (black arrowheads).

Photomicrograph from a boulder brain coral (Colpophyllia natans) found diseased in Biscayne Bay, FL, US. Within the basal body wall are necrotic “ghost” dinoflagellate endosymbionts with pale eosinophilic cytoplasm, lysis of nucleus, and loss of spherical shape (arrowheads). Normal endosymbionts are circled.