Between March and May 2019, wildlife rehabilitation centers along coastal southern California admitted increased numbers of Brandt's cormorants (Phalacrocorax penicillatus) with neurological disease including head tilt, nystagmus, torticollis, tremors, paresis, paralysis, and ataxia. Seven cormorants from Los Angeles County and one cormorant from Orange County were submitted for postmortem examination. Gross findings included thin to fair body condition, generalized congestion/hyperemia, nematode parasites in the ventriculus, and diarrhea in the seven birds from Los Angeles County while the one bird from Orange County had icterus. Histologic examination revealed sarcocysts in the adductor muscles and meningoencephalitis characterized by coalescing infiltrations of macrophages, lymphocytes and plasma cells with severe perivascular cuffing and gliosis in all eight cormorants. Rare to few numbers of schizonts were seen in the cerebrum of the seven cormorants from Los Angeles County whereas the cormorant from Orange County had numerous schizonts in various stages of development in the cerebrum, cerebellum, and brainstem. All eight birds were positive for the generic Sarcocystis spp. 28S PCR. The seven cormorants from Los Angeles County tested positive for the S. calchasi-specific ITS1 and confirmed by sequencing, while the analysis of the 28S sequence in the cormorant from Orange County showed a 100% homology to S. falcatula. This bird also was positive by immunohistochemistry for Sarcocystis spp. using a polyclonal antibody that detects S. falcatula and S. neurona. This report demonstrates for the first time that seabirds such as Brandt's cormorants may be intermediate or dead-end hosts for S. calchasi and/or S. falcatula, and that S. calchasi can cause epizootic infection in a seabird.

在2019年3月至2019年5月之间，加利福尼亚州南部沿海地区的野生动物康复中心承认布兰德s的数量增加了（Ph（Phalacrocorax penicillatus））患有神经系统疾病，包括头部倾斜，眼球震颤，斜颈，震颤，轻瘫，瘫痪和共济失调。洛杉矶县的7名and和橙县的1名cor已提交验尸。大体的发现包括瘦到中等的身体状况，普遍的充血/充血，脑室的线虫寄生虫，以及来自洛杉矶县的七只鸟的腹泻，而来自橙县的一只鸟则有黄疸。组织学检查显示，内收肌和脑膜脑炎的结节囊肿的特征是所有八只eight均合并巨噬细胞，淋巴细胞和浆细胞浸润，伴有严重的血管周围套扎和神经胶质变性。洛杉矶县的七只cor的大脑中很少见到裂殖体，而橙县的the在大脑，小脑和脑干的不同发育阶段都有许多裂殖体。所有八只鸟都对通用表示乐观肉孢子虫属。28S PCR。来自洛杉矶县的七只tested对卡尔加斯氏菌特异的ITS1检测呈阳性，并通过测序进行了确认，而对来自橙县的sequence的28S序列的分析表明与镰刀菌有100％的同源性。通过免疫组织化学，这只鸟也对Sarcocystis spp呈阳性。使用多克隆抗体检测镰刀菌和神经链球菌。该报告首次证明，诸如勃兰特s之类的海鸟可能是S. calchasi和/或falcatula和S. calchasi的中间宿主或死胡同。 会引起海鸟的流行病感染。