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Mycobacteria from the Mycobacterium avium complex (MAC) cause a variety of diseases including tuberculosis-like disease in humans and birds, disseminated infections in AIDS patients and otherwise immunocompromised patients, lymphadenitis in humans and mammals and paratuberculosis in ruminants. M. avium subsp. paratuberculosis (Map) is the etiologic agent of Johne´s disease in cattle and it has been identified in human patients with Crohn’s disease. The MAC comprises slow growing mycobacteria that are ubiquitous in the environment (soil and water), and have a wide source range, causing disease in various domestic and wild mammals and birds [1].
The aim of this study was to discuss the classification and biology, epidemiology, clinical signs, pathology, diagnostic techniques, and public health concerns in Mycobacterium avium complex in domestic and wild animals.
The aim of this study was to describe histopathological aspects observed in mesenteric lymph nodes
collected from 60 hunter-killed deer (Cervus elaphus)
during the 2009-2010 hunting seasons. Each sample
was fixed in 10% buffered formalin and processed by
the standard methods.
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Pulmonary lesions consistent with disseminated adiaspiromycosis in Egyptian mongooses (Herpestes ichneumon) from Portugal.
The prevalence of caseous-calcareous nodules in
mesenteric lymph nodes of wild boar (Sus scrofa) and
deer (Cervus elaphus) was studied from October 2009
to January 2010 in 228 animals (126 wild boars and
102 deer) hunted in Castelo Branco region.
Pulmonary lesions consistent with disseminated adiaspiromycosis in egyptian mongooses (Herpestes ichneumon) from Portugal.
Several studies have demonstrated that wildlife reservoirs of mycobacteria are responsible for the maintenance and spreading of the infection to livestock and wildlife counterparts. Recent data report the role of wild boar (Sus scrofa) as a reservoir for Mycobacterium bovis. This study was conducted to evaluate the chronic inflammatory response in the mesenteric lymph nodes (MLN) of wild boar with granulomatous lymphadenitis (n=30). Morphological parameters of the lesions were recorded. The expression of CD3 and CD79α molecules was evaluated by immunohistochemistry. Molecular genotyping and culture to identify mycobacteria were performed. The lesions consisted mainly of stage III and stage IV granulomas. CD3 and CD79α positive cells were observed in 15 (50%) and in 11 (36.6%) MLN, respectively. In these lesions, higher percentages of T lymphocytes were found and a limited number of animals exhibited a tendency for an increased percentage of B lymphocytes. Our results suggest that there are similar percentages and distribution patterns of CD3 and CD79α in the lesions, regardless of the presence of Mycobacterium avium subsp. paratuberculosis (Map), M. bovis or Map-M. bovis co-infection, and confirm that wild boar is both susceptible and could be an important Map and M. bovis wild reservoir in the study area.
Diffuse lymphadenitis and disseminated Mycobacterium avium subsp. paratuberculosis infection in two wild Eurasian otters (Lutra lutra L. 1758).
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Diffuse lymphadenitis and disseminated Mycobacterium avium subsp. paratuberculosis infection in two wild eurasian otters (Lutra lutra L. 1758).
Renal lesions in deer (Cervus elaphus) - Mycobacterium avium subsp. paratuberculosis involvelment.
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