132. Characteristics of the diphtheritic membrane / Which organs are primarily affected? December 23rd, 2007 by reuben in .pharyngitis Back Top Tags: card 131. diphtheria risk factors / What % adults >40 lack protective antibodies? / Two major kinds of infection 133. Complications of diphtheria / ddx / Rx Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.