<prompt> A membrane in the throat is caused by all exceptStreptococcusStaphylococciBorreliaCornyebacteria  <response>: Hemolytic streptococcus is the most common infecting organismDifferential Diagnosis of Membrane on Tonsili. Membranous tonsillitisii. Leukemiaiii. Diphtheriaiv. Aphthous ulcerv. Vincent;s anginavi. Malignancy of tonsilRef: Hazarika; 3rd ed; Pg 479 