Abstract：
Hydatid cyst (Hydatidosis) is considered one of the parasitic diseases that pose a threat to both animals and humans alike. Objectives: the present study was aimed to investigate cystic echinococcosis in sheep. By employing a variety of specific stains, we sought to uncover the mesmerizing histochemical changes associated with this condition. Twenty lung samples infected with hydatid disease were obtained. The samples were fixed in 10% formalin and processed and then stained with haematoxylin and eosin and some special stains such as Periodic Acid Schiff (PAS), Gomri\'s aldehyde fuschin, Best Carmine, Van Gieson, Toluidine blue and Alcian blue to investigate the histochemical changes that occurred in the lung tissue. Chemical changes were observed in the lung tissue affected by hydatid cysts, revealing insights into the underlying pathological processes. The presence of hydatid cysts was characterized by encapsulation within the lung tissue, consisting of a laminated layer surrounded by a fibrous membrane. Severe pneumonia was evident, accompanied by the infiltration of inflammatory cells and the presence of necrotic cells containing lytic nucleic acids. These changes resulted in atelectasis (partial or complete lung collapse) and emphysema (destruction of alveolar walls). Despite these pathological changes, intact elastic fibers were observed surrounding the bronchiole, indicating preserved structural integrity. Necrosis of epithelial cells in the bronchiole was also observed, disrupting normal respiratory system functioning. The hydatid cyst has a clear effect on the lung tissue, represented by the histochemical changes that certainly cause damage to the lung and this is reflected in its vital function inside the body.
摘要：
包虫囊肿（包虫病）被认为是对动物和人类都构成威胁的寄生虫病之一。目的：本研究旨在调查绵羊囊性包虫病。通过使用各种特定的染色剂，我们试图揭示与这种情况相关的令人着迷的组织化学变化。获得了20例感染包虫病的肺样本。将样品固定在10%福尔马林中并进行处理，然后用苏木精和伊红以及一些特殊染色剂如高碘酸希夫（PAS）染色，Gomri的醛Fuschin，最好的Carmine,VanGieson,甲苯胺蓝和阿尔辛蓝研究肺组织中发生的组织化学变化。在受包虫囊肿影响的肺组织中观察到化学变化，揭示对潜在病理过程的见解。包虫囊肿的存在以包囊在肺组织内为特征，由纤维膜包围的层压层组成。严重的肺炎很明显,伴随着炎症细胞的浸润和含有裂解核酸的坏死细胞的存在。这些变化导致肺不张（部分或完全肺塌陷）和肺气肿（肺泡壁破坏）。尽管有这些病理变化,在细支气管周围观察到完整的弹性纤维，表示保留的结构完整性。还观察到细支气管上皮细胞坏死，扰乱正常的呼吸系统功能。包虫囊肿对肺组织有明显的影响，以组织化学变化为代表，肯定会对肺造成损害，这反映在其在体内的重要功能上。
