Fly fishing in a river. Fly fishing is an angling method in which an artificial 'fly' is used to catch fish. The fly is cast using a fly rod, reel, and specialized weighted line. Casting a nearly weightless fly or 'lure' requires casting techniques significantly different from other forms of casting.
Antistreptolysin O (ASO) titer is a blood test to measure antibodies against streptolysin O, a substance produced by Group A Streptococcus bacteria. ASO titer; ASLO. Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand.
Materials used in the ASO Test. 1  ASO Antigen: A stabilized buffered suspension of polystyrene latex particles coated with Streptolysin O and 0.1% sodium azide as preservative. 2  Shake well prior to use. 3  ASO Positive Control: Human serum containing more than 200 IU/ml ASO and 0.1% sodium azide as preservative.