Groups are determined by PRECIPITIN test, serologic test to measure a specific reaction between antigen (C carbohydrate, located in the cell wall) and antibody which results in a visible precipitate. Group A Streptococci (Streptococcus pyogenes) is among the most important human pathogens.
Answers.comÂ® is making the world better one answer at a time. Striking an object is the leading cause of pwc accidents on boats.
This creates a lever action that increases tension on the anchor line, pulling the stern deeper into the water. When the line is retrieved the added pull can swamp the boat. The second greatest cause of fatal accidents is someone falling overboard. Most of these happen while the boat is moored, or at anchor.