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 most common causes of spinal cord injuries in the United States are: 1  Motor vehicle accidents. 2  Auto and motorcycle accidents are the leading cause of spinal cord injuries, accounting for more than 35 percent of new spinal cord injuries each year.