Final answer:
The three main organisms responsible for causing pneumonia in asplenic patients are Pneumocystis jirovecii, Pseudomonas aeruginosa, and Streptococcus pneumoniae.
Step-by-step explanation:
The three main organisms responsible for causing pneumonia in asplenic patients are Pneumocystis jirovecii, Pseudomonas aeruginosa, and Streptococcus pneumoniae.
Pneumocystis jirovecii is a fungus and is the leading cause of pneumonia in patients with acquired immunodeficiency syndrome (AIDS). It can also be seen in other compromised patients and premature infants. The best treatment for these infections is the combination drug trimethoprim-sulfamethoxazole (TMP/SMZ).
Pseudomonas aeruginosa is a bacterium that can cause serious cases of bacterial pneumonia in patients with cystic fibrosis and hospitalized patients on ventilators. This bacterium is extremely antibiotic resistant and can produce a variety of exotoxins.
Streptococcus pneumoniae is the most common cause of community-acquired bacterial pneumonia. It is a gram-positive bacterium and is commonly found in the respiratory tract. Infection with this bacterium can lead to inflammation and accumulation of fluids and white blood cells in the alveoli.