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.
There is not enough space here to list all the causes of backing accidents. Every driving environment. presents its own set of variables that may contribute to hazardous circumstances. However, most. backing accidents share in common one or more of these fundamental causes: 1. Backing Unnecessarily.