<prompt> All of the following statements isare true about post streptococcal glomerulonephritis except -Early treatment of streptococcal pharyngitis prevents glomerulonephritisAll cases of streptococcal infection lead to glomerulonephritisHump sign may be presentImmune complex deposits are seen  <response>: Only ceain strains of group A Beta-hemolytic streptococci are nephritogenic, more than 90 of cases been traced to types 12,4 1, which can be identified by typing of M protein of cell wall. Electron microscopy shows deposited immune complexes arrayed as subendothelial, intramembranous, or most often, subepithelial humps nestled against the GBM. Ref: Pathologic basis of disease ROBBINS 8th edition, pg no:917 ROBBINS basic pathology 9th edition, pg no:529 