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 of Spasmodic croup. This section discusses 1 medical conditions causing Spasmodic croup. A simple discussion of these causes with additional information is below. Some of the possible common medical causes of Spasmodic croup may include: Parainfluneza virus.