What percentage of pneumonias are caused by atypical pathogens?

1 The mortality rate among hospitalized patients with CAP varies each year and can reach 35 percent. 2 While Streptococcus pneumoniae causes up to 70 percent of CAP cases, atypical pathogens are responsible for 30 to 40 percent of cases3 and may be copathogens in other cases.Click to see full answer. Accordingly, what is the most common cause of atypical pneumonia?Three specific infectious bacteria cause the majority of atypical pneumonia cases: Mycoplasma pneumoniae usually infects people under 40 with mild pneumonia symptoms. It commonly causes earaches, headaches, and a sore throat, as well. Chlamydophila pneumoniae is common in school-aged children and young adults.Secondly, what is typical and atypical pneumonia? Typical pneumonia is usually caused by bacterial pathogens like Streptococcus pneumoniae, Staphylococcus aureus. Klebsiella pneumoniae, Haemophilus influenzae c. In contrast, atypical CAP is characterized by preceeding upper airway symptoms, myalgias, fever without chills, headache and unproductive cough. Moreover, is Legionella an atypical bacteria? Legionella pneumoniae is the most pathogenic of the atypical bacteria that cause lung infection. Several serotypes exist and infection tends to occur in close quarters.What is the least common pathogen found in community acquired atypical pneumonia?However, because these pathogens are relatively infrequent causes of community-acquired pneumonia, S. pneumoniae remains the most common cause of death in patients with community-acquired pneumonia. Atypical pathogens such as Mycoplasma have a good prognosis.