Age of Menarche. Menarche marks the commencement of the reproductive phase of a woman's life. Records suggest that there was a secular decline in the average age at menarche in developed countries across the 19th and 20th Centuries until the 1950s, with an average age at menarche of 15-17 years reported in the mid-19th Century.
CHARACTERISTICS: Streptococcus pyogenes is an aerobic, gram-positive extracellular bacterium. It is made up of non-motile, non-sporing cocci that are less then 2 Âµm in length and that form chains and large colonies greater then 0.5 mm in size.HARACTERISTICS: Streptococcus pyogenes is an aerobic, gram-positive extracellular bacterium. It is made up of non-motile, non-sporing cocci that are less then 2 Âµm in length and that form chains and large colonies greater then 0.5 mm in size.
Streptococcus pyogenes, also known as the flesh eating bacteria, is the most pathogenic bacterium in the whole genus (2).The name pyogenes comes from the word pyogenic, which is a classification for the streptococci that are associated with pus formation.The effects of this microbe range from mild illnesses such as strep throat and impetigo to more serious diseases such as scarlet fever, glomerulonephritis, and necrotizing fasciitis (3).treptococcus pyogenes, also known as the flesh eating bacteria, is the most pathogenic bacterium in the whole genus (2).