Multisystemic eosinophilia resembling hypereosinophilic syndrome in a colony-bred Owl Monkey (Aotus vociferans)

Alfonso S. Gozalo, Helene F. Rosenberg, William R. Elkins, Enrique J. Montoya, Richard E. Weller

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In animals, multisystemic eosinophilic disease is a rare condition characterized by eosinophilic and lymphoplasmacytic infiltrates in various organs. This disorder resembles the human disease known as hypereosinophilic syndrome, a condition defined by prolonged peripheral eosinophilia in the absence of recognizable etiology and associated with end-organ damage. In this report we describe a research-naïve, colony-born, juvenile female owl monkey (Aotus vociferans) who presented clinically with severe respiratory distress and histologically with multiple end-organ infiltration with phenotypically mature eosinophils, plasma cells, and lymphocytes. No tumors or infectious agents were noted either macroscopically or microscopically. Cultures from lung samples revealed no bacteria or fungi. Histologic examination of lung, heart, thymus, liver, spleen, kidney, adrenal, pancreas, stomach, small intestine, and colon revealed no migrating nematode larvae, other parasites, or foreign material that might trigger eosinophilia, nor was there any evidence of or history consistent with an allergic etiology. Given that we ruled out most exogenous and endogenous triggers of eosinophilia, the signs, symptoms, and pathologic findings support the diagnosis of multisystemic eosinophilic disease. To our knowledge, this report is the first description of presumptive hypereosinophilic syndrome in a nonhuman primate.

Original languageEnglish
Pages (from-to)303-306
Number of pages4
JournalJournal of the American Association for Laboratory Animal Science
Issue number3
StatePublished - May 2009


Dive into the research topics of 'Multisystemic eosinophilia resembling hypereosinophilic syndrome in a colony-bred Owl Monkey (Aotus vociferans)'. Together they form a unique fingerprint.

Cite this