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.
What is the leading cause of accident? Environmental, material, human number one cause of all auto accidents in the US - distracted drivers. get off the cell phone, stop texting, put the makeup away and set the sâ¦oda down and quit tuning the radio and reading the newspaper and and and pay attention to the road.
The CDC's National Center for Health Statistics (NCHS) says that 48% of deaths in youngsters 12 to 19 are caused by unintentional injuries. Of these injuries, 73% are caused by motor vehicle accidents. Other leading causes of teenage deaths are homicide (13%), suicide (11%), cancer (6%), and heart disease (3%).