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.
Causes. Some causes of acquired CP are: 1  InfectionâInfections of the brain, for example, meningitis or encephalitis during infancy. 2  Injury âInjuries to the brain, for example, head injuries caused by motor vehicle crashes or child abuse.here are several possible causes of the abnormal development or damage. People used to think that CP was mainly caused by lack of oxygen during the birth process. Now, scientists think that this causes only a small number of CP cases.