In a pedigree, a male is usually represented by a square while females are represented by circles. A marriage between a male and a female is represented by a horizontal line that joins a square to a circle. Affected individuals for a trait within a pedigree are shaded.
<em>Hence, a shaded circle should be used to represent a second generation female who expresses the trait in a pedigree.</em>
The most common type of bacteria that causes community-acquired pneumonia (CAP) is Streptococcus pneumoniae. Other bacteria that cause CAP include Mycoplasma pneumoniae, Chlamydophila pneumoniae, and Legionella pneumophila. Mycoplasma pneumoniae is known to be the main cause of walking pneumonia.
