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.
Top 5 Causes of Accidental Death in the United States. Accidents happen â and they also kill enough people to rank as the No. 1 cause of death for those ages 1 to 42, according to the National Safety Council. Accidents are the fifth-leading cause of death across all age groups, topped only by a spate of illnesses that include heart disease and cancer. And itâs not the heavy-machinery operators, high-rise window washers or electricians who most frequently succumb to fatal accidents.