Greve J H, Albers H F, Suto B, Grimes J
Avian Dis. 1986 Jul-Sep;30(3):482-7.
Lesions caused by experimentally produced mixed infections (two flukes, Phagicola longa and Mesostephanus appendiculatoides, and an ascarid, Contracaecum sp.) were studied in 40 brown pelicans. The flukes occurred throughout the intestines and caused mild villus atrophy, lengthening of the crypts, increased goblet cell population, and lymphoplasmacytic infiltration. Contracaecum caused small ulcers where they attached to the esophagus and proventriculus. Microscopically, these ulcers had an eosinophilic, hyaline lining surrounded by focal necrosis, cellular infiltration, and fibrosis. Changes in several biochemical constituents of the blood were seen. These gastrointestinal parasitisms had low virulence, and they probably play a secondary role as a factor influencing population fluctuations in brown pelicans.
在40只褐鹈鹕中研究了由实验性产生的混合感染（两种吸虫，长咽吸虫和附肢中带吸虫，以及一种蛔虫， Contracaecum属）引起的病变。吸虫遍布整个肠道，导致轻度绒毛萎缩、隐窝延长、杯状细胞数量增加以及淋巴浆细胞浸润。Contracaecum属在附着于食管和前胃处引起小溃疡。显微镜下，这些溃疡有嗜酸性、透明的内衬，周围有局灶性坏死、细胞浸润和纤维化。观察到血液中几种生化成分的变化。这些胃肠道寄生虫毒力较低，它们可能作为影响褐鹈鹕种群波动的一个因素起次要作用。
