You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is You are examining the specimen taken from a child with Otitis. On microscopy you see capsulated lanceolate diplococci and the culture of the specimen shows a draughtsman appearance. What is the diagnosis? and explain in detail?
Pneumococci are gram positive lanceolate diplococci with capsules. When grown on blood agar the colony, assume a dome shape with an area of alpha haemolysis and resembles S.viridans. On fuher incubation the colonies become flat with raised edges and central depression, so that concentric rings are seen on the surface when viewed from above. ie it has carrom coin/ draughtsman appearance. Ref: Textbook of Microbiology by R.Ananthanaraya, Edition 6, Page 201