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Gram-negative bacteremia occurs more frequently in elderly populations (65 years or older) and is associated with higher morbidity and mortality in this population. [23] E.coli is the most common cause of community-acquired bacteremia accounting for approximately 75% of cases. [24] E.coli bacteremia is usually the result of a urinary tract ...
Streptococcus agalactiae is the most common human pathogen belonging to group B of the Lancefield classification of streptococci—hence the name of group B stretococcal (GBS). Infection with GBS can cause serious illness and sometimes death, especially in newborns, the elderly, and people with compromised immune systems.
It is the second-leading cause of death in non-coronary intensive care unit (ICU) and the tenth-most-common cause of death overall (the first being heart disease). [111] Children under 12 months of age and elderly people have the highest incidence of severe sepsis. [30]
[7] [4] Recurrences are common, with nearly half of people getting a second infection within a year. Urinary tract infections occur four times more frequently in females than males. [7] Pyelonephritis occurs between 20 and 30 times less frequently. [4] They are the most common cause of hospital-acquired infections accounting for approximately ...
Aerococcus urinae is a member of the bacterial genus Aerococcus.The bacterium is a Gram-positive, catalase-negative coccus growing in clusters. Isolates of this genus were originally isolated in 1953 from samples collected in the air and dust of occupied rooms and were distinguished by their tetrad cellular arrangements. [2]
Streptococcus pneumoniae is the most common bacterial cause of pneumonia in all age groups except newborn infants. Streptococcus pneumoniae is a Gram-positive bacterium that often lives in the throat of people who do not have pneumonia. Other important Gram-positive causes of pneumonia are Staphylococcus aureus and Bacillus anthracis.
It can be a cause of neonatal infections. [4] Streptococcus pneumoniae is the main cause of community acquired pneumonia and meningitis in children and the elderly, [5] and of sepsis in those infected with HIV. The organism also causes many types of pneumococcal infections other than pneumonia.
Staphylococcus aureus is the most common cause of endocarditis in people who use intravenous drugs. [23] Viridans streptococci and Enterococci are the second and third most common organisms responsible for infective endocarditis. [11] Viridans streptococci are a common cause of infective endocarditis in South America.