In a splenectomized patient there is increase of infection by all the organisma except –
**Core Concept**
A splenectomized patient has an increased risk of infection due to the loss of splenic function, which includes the filtration of the blood and the removal of pathogens. The spleen also plays a crucial role in the immune system by storing lymphocytes and activating the complement system.
**Why the Correct Answer is Right**
The spleen is responsible for filtering the blood and removing pathogens, including encapsulated bacteria such as Streptococcus pneumoniae, Haemophilus influenzae, and Neisseria meningitidis. The loss of splenic function in a splenectomized patient increases the susceptibility to infections by these organisms. This is because the spleen is the primary site for the opsonization and phagocytosis of these encapsulated bacteria.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because encapsulated bacteria such as Streptococcus pneumoniae are more likely to cause infections in a splenectomized patient.
**Option B:** This option is incorrect because the risk of infection by non-encapsulated bacteria such as E. coli is not significantly increased in a splenectomized patient.
**Option C:** This option is incorrect because the risk of infection by Staphylococcus aureus is not directly related to splenectomy.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the risk of infection in a splenectomized patient can be mitigated by vaccination against encapsulated bacteria, such as pneumococcal conjugate vaccine and meningococcal conjugate vaccine.
**Correct Answer: C. Staphylococcus aureus**