40 year old female, who has multiple sexual paners presented with fever, rash and aicular symptoms. Migratory ahritis and tenosynovitis of knees, hands, wrists, feet and ankles noticed during clinical examination. Synol fluid leukocyte count was 12,000/ml and culture was sterile. The patient has been successfully treated with injection ceftriaxone 1 g Q24 hours for 7 days. What was the diagnosis in this setting?