Coccidioides immitis. A Coccidioides immitis. A. Lung tissue with a large thick-walled spherule containing multiple endospores. The smaller spherule to its left has ruptured releasing endospores. (Reproduced with permission from Connor DH, Chandler FW, Schwartz DQ, et al: Pathology of Infectious Diseases. Stamford CT: Appleton & Lange, 1997.) B. Mold phase in which alternate cells have differentiated to form barrel-shaped arthroconidia. (Reproduced with permission from Nester EW: Microbiology: A Human Perspective, 6th edition. 2009.) Source: Pathogenic Fungi, Sherris Medical Microbiology, 6e Citation: Ryan KJ, Ray C. Sherris Medical Microbiology, 6e; 2014 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/Books/1020/rya_ch47_f007.png&sec=56996988&BookID=1020&ChapterSecID=56968784&imagename= Accessed: November 02, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved