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1 July 1995 Probable Epizootic Chlamydiosis in Wild California (Larus californicus) and Ring-Billed (Larus delawarensis) Gulls in North Dakota
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Abstract

During the summer of 1986, more than 400 California gulls (Larus californicus) and ring-billed gulls (Larus delawarensis), primarily fledglings, died on an island in Lake Sakakawea near New Town, North Dakota (USA). Mortality was attributed largely to chlamydiosis. Necropsy findings in nine carcasses included splenomegaly (n = 9), hepatomegaly (n = 4), and pericarditis (n = 1). Livers from three California gulls and two ring-billed gulls, and spleens from the same five birds plus a third ring-billed gull were positive for Chlamydia psittaci by the direct immunofluorescence test. Chlamydia psittaci was isolated from separate pools of liver and spleen from one California gull and one ring-billed gull. This is believed to be the first record of epizootic chlamydiosis in gulls and the second report of epizootic chlamydial mortality in wild birds in North America.

Franson and Pearson: Probable Epizootic Chlamydiosis in Wild California (Larus californicus) and Ring-Billed (Larus delawarensis) Gulls in North Dakota
J. Christian Franson and James E. Pearson "Probable Epizootic Chlamydiosis in Wild California (Larus californicus) and Ring-Billed (Larus delawarensis) Gulls in North Dakota," Journal of Wildlife Diseases 31(3), (1 July 1995). https://doi.org/10.7589/0090-3558-31.3.424
Received: 12 September 1994; Published: 1 July 1995
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