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.
By far the biggest cause of road accidents is driver/rider error or reaction, which causes 68% of all crashes. The top ten most common causes of traffic accidents are: 1  Failed to look properly 35%.  Failed to judge other persons's path or speed 18.9%.