Neagari Yasuko, Arii Suzue, Udagawa Mai, Onuma Manabu, Odaya Yoshiya, Kawasaki Takeshi, Tenpaku Makio, Hayama Hisayo, Harada Ken-ichi, Mizukami Masaya, Murata Koichi
Laboratory for Intellectual Fundamentals for Environmental Studies, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba City, Ibaraki Prefecture, 305-8506, Japan.
J Wildl Dis. 2011 Jan;47(1):49-55. doi: 10.7589/0090-3558-47.1.49.
More than 70 egrets and herons were found sick or dead at an agricultural water reservoir in Kanagawa Prefecture, Japan between September and October 2008. The birds showed weakness, lethargy, and inability to fly before death. Postmortem findings included large amounts of firm subcutaneous and cavitary fat comprised of necrotic adipose tissues with infiltrates of heterophils and macrophages. The birds were diagnosed with steatitis on the basis of the gross lesions and histopathology. Egrets with steatitis had low blood levels of vitamin E. High counts of cyanobacteria (Microcystis aeruginosa) were found in the reservoir concurrent with the outbreak of steatitis. No microcystin was detected in the reservoir water or the livers from the egrets. This is the first report of steatitis in wild birds in Japan.
2008年9月至10月期间，在日本神奈川县的一个农业用水蓄水池中发现70多只白鹭和苍鹭生病或死亡。这些鸟类死前表现出虚弱、嗜睡和无法飞行。尸检结果包括大量坚实的皮下和体腔脂肪，由坏死的脂肪组织组成，伴有嗜中性粒细胞和巨噬细胞浸润。根据大体病变和组织病理学，这些鸟类被诊断为脂肪炎。患有脂肪炎的白鹭血液中维生素E水平较低。在蓄水池中发现大量蓝藻（铜绿微囊藻），同时发生脂肪炎疫情。在蓄水池水或白鹭肝脏中未检测到微囊藻毒素。这是日本野生鸟类脂肪炎的首次报告。
