Canids

Acute toxoplasmosis has been reported in arctic foxes (Alopex lagopus) (S0rensen et al., 2005),

Toxoplasma gondii. The Model Apicomplexan-Perspectives and Methods, edited by Weiss & Kim ISBN-13: 978-0-12-369542-0 ISBN-10: 0-12-369542-2

Copyright © 2007 Elsevier Ltd. All rights of reproduction in any form reserved.

FIGURE 6.1 Fatal toxoplasmic encephalitis in a naturally infected bobcat. H & E stain.

(A) Necrosis and inflammation of a blood vessel (arrow). Bar = 50 pm.

(B) Tachyzoites (arrows) in a capillary. Bar = 10 |im.

(C) Vasculitis and suppurative encephalitis. Bar = 100 |im.

(D) An abscess with degenerating neutrophils and tachyzoites (arrows). Bar = 10 |im.

FIGURE 6.1 Fatal toxoplasmic encephalitis in a naturally infected bobcat. H & E stain.

(A) Necrosis and inflammation of a blood vessel (arrow). Bar = 50 pm.

(B) Tachyzoites (arrows) in a capillary. Bar = 10 |im.

(C) Vasculitis and suppurative encephalitis. Bar = 100 |im.

(D) An abscess with degenerating neutrophils and tachyzoites (arrows). Bar = 10 |im.

Fennec foxes (Fennecus zerda) (Kottwitz et al., 2004), gray foxes (Urocyon cinereoargenteus) (Davidson et al., 1992; Dubey and Lin, 1994; Kelly and Sleeman, 2003), and red foxes (Vulpes vulpes) (Reed and Turek, 1985; Dubey et al., 1990; Kelly and Sleeman, 2003). Co-infection with canine distemper virus is often associated with clinical toxoplasmosis in gray foxes (Davidson et al., 1992; Kelly and Sleeman, 2003) and red foxes (Reed and Turek, 1985). Clinical toxoplasmosis has not been documented in wolves, coyotes, hyenas, or dingos. Toxoplasma gondii has been isolated from red foxes (Smith and Frenkel, 1995; Dubey et al., 2004a), gray foxes (Dubey et al., 2004a), and coyotes (Lindsay et al., 1997a; Dubey et al., 2004a).

6.2.3 Bears

Clinical toxoplasmosis has not been reported from bears. Viable T. gondii has been isolated from black bears (Ursus americanus) (Dubey et al., 1995a). Serological surveys indicate that T. gondii infections occur in polar bears (Ursus maritimus) (Rah et al., 2005) and in grizzly bears (Ursus arctos)

(Chomel et al., 1995). Bear meat should be considered a potential source of T. gondii.

0 0

Post a comment