The most frequent bacterial cause of community acquired pneumonia (CAP) is Streptococcus pneumoniae.
This bacterium, also known as pneumococcus, is responsible for a significant proportion of CAP cases diagnosed worldwide.
While other organisms like Mycoplasma pneumoniae and Staphylococcus aureus can cause pneumonia, they are less common as primary agents of CAP compared to Streptococcus pneumoniae. Legionella haemophilia is not a typical or common cause.
According to the WHO clinical criteria, which of the following clinical signs are indicative of 'severe pneumonia or very severe disease' in children aged 2 months to 5 years?
1. Convulsions
2. Lower chest indrawing
3. Inability to feed
4. Stridor
Select the correct answer using the code given below.