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.
What causes accidents is an unexpected or unplanned disruption in a vehicle's velocity, linear or angular, due to hitting something or simply not anticipating or addressing the change properly. In other words, it's not the motion but the disruption of it.