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.
The leading cause of PWC accidents among riders in 2007 was reckless or careless driving. According to the National Transportation Safety Board in the U.S., this accounted for 26.3 percent of all PWCs involved in accidents in 2007.