Images

(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.

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).

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 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.

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 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.

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).

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. 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.

Image from a Timber Wolf (Canis lupus) found dead in Northern Wisconsin, USA. Ulceration of the mucosa of the distal esophagus (arrows). A plastic bag was extracted from where it was tightly lodged in the cardia of the stomach.

Image from a Timber Wolf (Canis lupus) found dead in Northern Wisconsin, USA. There are multiple areas of lysis of bone in the atlas (arrows).

Image from a Timber Wolf (Canis lupus) found dead in Northern Wisconsin, USA. Multiple 8-20 micron, extracellular, round yeasts, some exhibiting broad-based budding, are present in necrotic debris within an area of osteomyelitis in the atlas (arrow) (markedly autolyzed tissue). Grocott’s Methenamine Silver (GMS) stain.

Image from a Timber Wolf (Canis lupus) found dead in Northern Wisconsin, USA. A focus of bony proliferation is seen on a radiograph of the left proximal radius (arrow).

Photomicrographs from a Common Grackle (Quiscalus quiscula) found dead in Ohio, U.S.A. H&E stains. (A) Longitudinal (arrow) and cross sections (arrowheads) of microfilariae in a pulmonary blood vessel. (B) Microfilariae (arrows) within a parabronchus. (C) Microfilaria (arrow) within the cerebellar parenchyma with no associated inflammation.

Photomicrographs from a Fisher (Pekania pennanti) found dead in Wisconsin, USA. (A) Blood vessels in the brain are surrounded by low numbers of lymphocytes and plasma cells (arrows). H&E stain. (B) A blood vessel in the brain is surrounded by low numbers of lymphocytes and plasma cells (black arrow).

Photographs from a Bald Eagle (Haliaeetus leucocephalus) with highly pathogenic avian influenza found dead in Wisconsin, USA.  (A) The pancreas is reddened and has pinpoint to coalescing tan foci of necrosis (arrows). (B) The spleen contains pinpoint tan foci (arrows).