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 next most common cause of truck accidents is equipment failure. This can include manufacturing mistakes (defective tires) or design errors (failure to provide backing warning or object detection systems). However, most mechanical causes of truck accidents are caused by a failure to properly maintain the equipment.