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Infections in the blood
Infections in the blood, known medically as bloodstream infections (BSIs), occur when pathogens such as bacteria, viruses, fungi, or protozoa enter the bloodstream and can lead to serious health complications if not treated promptly.
Types of Blood Infections
Bacteremia: Presence of bacteria in the blood. This can result from infections in other parts of the body, surgical procedures, or invasive devices. If not managed, bacteremia can trigger sepsis or septic shock and lead to infections elsewhere, like endocarditis.
Viremia: Viruses in the bloodstream. Examples include HIV, hepatitis B and C, and Ebola
Fungemia: Fungal infections in the blood, commonly from Candida species, most often seen in immunocompromised patients.
Protozoa mia : Protozoan pathogens, such as those causing malaria or babesiosis.
Causes and Risk Factors
Blood infections can arise from:Primary infections in organs (e.g., pneumonia, urinary tract infection)Catheter or medical device use Surgical Procedure intravenous drug use Individuals with weakened immune systems—such as those with chronic illnesses, cancer, HIV, or on immunosuppressive therapies—are at higher risk.
Symptoms
Common signs and symptoms of bloodstream infections include:
Fever and chills
Fatigue and body ache
rapid heart rate and breathing
Low blood pressure
Confusion
Rash (in some cases).
Diagnosis and Treatment
Doctors diagnose blood infections using blood cultures, blood tests, urine tests, imaging scans, or spinal taps (if meningitis is suspected).
Treatment depends on the causative agent but often requires urgent administration of antibiotics, antivirals, or antifungals, and supportive care, especially to prevent progression to sepsis or septic shock.
Complications
A key complication of blood infections is sepsis, which is the body's extreme response to infection, leading to tissue damage, organ failure, and sometimes death if not treated quickly.
Bloodstream infections are considered medical emergencies and require immediate attention to reduce the risk of serious outcomes.
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