@RheumNow #acr20 abs0622 infection induced MPO anca vasc: most common triggers viruses(35.2%), mycobacterial (29.4%)& bacterial inf (29.4%). Onset 3 mo post inf. (70.5%) renal involvement, w/ biopsy-proven GN in 53%. 17.6%died. Rx steroids+abx, CYC in 47%.