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Suspected Cases of Neorickettsia ‐Like Organisms in Brazilian Dogs
Author(s) -
HEADLEY SELWYN A.,
VIDOTTO ODILON,
SCORPIO DIANA,
DUMLER J STEPHEN,
MANKOWSKI JOSEPH
Publication year - 2004
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1307.010
Subject(s) - pathology , lymph , lymphoid hyperplasia , mesenteric lymph nodes , lymphatic system , spleen , hyperplasia , biology , lymphoma , medicine , immunology
A bstract : Preliminary findings of gross and histopathological lesions consistent with salmon poisoning disease in 10 dogs from southern Brazil are described. Lesions were restricted to the spleen, lymph nodes, and intestinal lymphoid tissues. Grossly, there was marked hyperplasia of mesenteric lymph nodes and Peyer's patches. Microscopic alterations were characterized by diffuse hyperplasia of intestinal lymphoid tissues and Peyer's patches. Intracytoplasmic organisms consistent with Neorickettsia helminthoeca were demonstrated by Giemsa stain in reticuloendothelial cells of the intestine, spleen, Peyer's patches, and lymph nodes. We have named this organism Neorickettsia helminthoeca ‐like because of its marked similarity with the agent described in the United States.