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.
According to the United States Coast Guard, the number one cause of boat accident injuries is capsized boats. Each year, an estimated 1,000 people die in boating accidents and many of those fatalities occur when a boat overturns and those aboard suffer head injuries or drown.