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.
Some research suggests that at least a portion of this increase is due to improved reporting of falls, they note. The five leading causes of unintentional injury deaths in US adults aged 65 years or older are falls, motor vehicle traffic accidents, suffocation, poisoning, and fire. In 2012-2013, 14% of unintentional injury deaths in this age group were due to motor vehicle accidents, resulting in more than 6000 deaths per year.