Makhija Mani
Department of Histopathology, National Reference Laboratory, Dr. Lal PathLabs, Delhi, India.
Indian J Pathol Microbiol. 2012 Oct-Dec;55(4):552-4. doi: 10.4103/0377-4929.107813.
Sarcocystis is an apicomplexan protozoan belonging to same phylum as toxoplasma. The parasite encysts inside striated muscles of its intermediate host. Humans are accidental host infected by eating food or water contaminated with oocysts or sporocysts of an infected definitive host. The infection is increasing in Southeast Asia and may be overlooked in histological sections if one is not aware of the histomorphological features. The size and shape of the bradyzoites and the appearance of the cyst wall are the reliable features to distinguish this parasite from other parasites of the same phylum. The incidence of human infection is rising in Southeast Asia and histopathology is an important method for the diagnosis of muscular infection. It is important to recognize the histomorphology of this parasite and its differentiation from similar parasites.
肉孢子虫是一种顶复门原生动物，与弓形虫属于同一门。该寄生虫在中间宿主的横纹肌内形成包囊。人类是偶然宿主，通过食用被感染终宿主的卵囊或孢子囊污染的食物或水而感染。在东南亚，这种感染正在增加，如果不了解组织形态学特征，在组织切片中可能会被忽视。缓殖子的大小和形状以及包囊壁的外观是将这种寄生虫与同一门的其他寄生虫区分开来的可靠特征。在东南亚，人类感染的发生率正在上升，组织病理学是诊断肌肉感染的重要方法。认识这种寄生虫的组织形态学及其与相似寄生虫的鉴别很重要。
