An Epizootic of Chlamydiosis with High Mortality in a Captive Population of Euphonias (Euphonia violaceas) and Hummingbirds (Amazilia amazilias)

Publication Type:Journal Article
Year of Publication:1992
Authors:Meteyer, CU, Chin, RP, Castro, AE, Woods, LW, Gentzler, RP
Journal:Journal of Zoo and Wildlife Medicine
Date Published:1992
ISBN Number:10427260
Keywords:Amazilia, Amazilia amazilia, Euphonia, Euphonia violacea, Fringillidae, Trochilidae
Abstract:Six euphonias (Euphonia violaceas) and 10 amazilia emerald hummingbirds (Amazilia amazilias) were purchased from separate breeders and kept in quarantine after arrival. Within 2 days, one of the euphonias became ill and died. One of the hummingbirds was dead on arrival, and the other hummingbirds were unthrifty. Necropsy revealed hepatomegaly and splenomegaly. Histologic examination of tissues showed necrotic hepatic cells scattered throughout the liver and infiltration of histiocytes, lymphocytes, and plasma cells particularly in the periportal region. Kupffer cells were numerous and prominent and often contained granular basophilic organisms in the cytoplasm. The spleen had scattered individual cell necrosis and plasma cell hyperplasia. All six of the imported euphonias died within the subsequent 2 mo as did nine hummingbirds. Chlamydial infection was diagnosed by positive monoclonal fluorescent antibody and Gimenez stains of tissue impression smears in three euphonias and two hummingbirds, by isolation of Chlamydia psittaci (two euphonias), and by compatible histologic and gross lesions.
Short Title:Journal of Zoo and Wildlife Medicine
Taxonomic name: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith