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 lack of education in personal watercraft operators is a cause for concern as well; a 1997 study estimated that 84% of PWC operators (including renters) had received no boating instruction whatsoever. PWC injuries account for 36% of all reported boating injuries.