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.
Conservatively assuming that PWC operate for one-fifth as many hours per year as most other types of boats, these numbers mean that an hour of PWC operation is about 65 times as likely to result in a reportable accident as an hour of all other forms of boating.