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 majority of car accidents are caused by irresponsible driving behavior. Statistics also show that 98 % of car accidents involve a single distracted driver. Some common causes include: 1  Rubbernecking: Drivers slowing down their cars to watch what is going on. 2  Cell phones: Drivers using their commute time to make phone calls. 3  Driver fatigue. 4  Passenger distractions. 5  Looking at scenery.