PDF Clinical and microbiological features of Actinotignum

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Aerococcus urinae may cause urinary tract infections, bacteremia, and endocarditis. No standardized susceptibility test methods or interpretive criteria have been proposed for this organism. This study reports the MIC results for 128 A. urinae isolates tested by broth microdilution.

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Keywords: Aerococcus, Aerococcus sanguinicola, Aerococcus urinae, antibiotic treatment, infective endocarditis, urinary tract infection Article published online: 8 October 2015 Corresponding author: M. Rasmussen, Department of Clinical Sciences Lund, Division of Infection Medicine, Tornavägen 10, BMC B14, SE-221 84 Lund, Sweden In vitro antimicrobial susceptibility of Aerococcus urinae to 14 antibiotics, and time-kill curves for penicillin, gentamicin and vancomycin. J Antimicrob Chemother 48 : 653 – 658 . doi: 10.1093/jac/48.5.653 .

Aerococcal infections - from bedside to bench and back

This study reports the MIC results for 128 A. urinae isolates tested by broth microdilution. 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.

However, A sanguinicola has often reduced susceptibility to fluoroquinolones [ 1, 3, 5 ]. High-level fluoroquinolone resistance has also been described [ 11 ]. The antibiotic susceptibilities varied slightly between the two species. Both Aerococcus species were susceptible to β-lactam antibiotics with modal MICs for penicillin based on 308 A. urinae and 65 A. sanguinicola isolates in the MIC range of 0.03-0.06 mg/L [ 1 A. sanguinicola and A. urinae had low ceftriaxone, penicillin, and vancomycin MICs. MICs to erythromycin and levofloxacin were ≥0.5 and >4 μg/mL in 41% and 78% of A. sanguinicola and 17% and 23% of A. urinae isolates, respectively. A. urinae, A. sanguinicola, and Aerococcus sp.
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31,629 urine samples were analyzed.

The mainstay of treatment has been beta-lactams for AUE [ 30 ]. A. urinae may also cause invasive infections including urosepsis and infective endocarditis, especially in elderly men with underlying urinary tract diseases. A. urinae is sensitive to many commonly used antibiotics such as penicillin, cephalosporins, and vancomycin.
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Aerococcal infections - from bedside to bench and back

Both Aerococcus species were susceptible to β-lactam antibiotics with modal MICs for penicillin based on 308 A. urinae and 65 A. sanguinicola isolates in the MIC range of 0.03-0.06 mg/L [1 Rasmussen M. Aerococcus: An increasingly acknowledged human pathogen. Ett annat antibiotikum, ciprofloxacin, som vanligtvis ges till patienter med mer komplicerade urinvägsinfektioner (t.ex. njurbäckeninflammation), hade bra effekt i nio fall av UVI orsakat av A. urinae. Dock noterades en ganska utbredd resistens mot ciprofloxacin hos A. sanguinicola-isolaten.

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PDF Clinical and microbiological features of Actinotignum

2018-10-17 · Background Aerococcus urinae is a gram-positive, alpha-hemolytic coccus bacterium primarily implicated in less than 1 % of all symptomatic urinary tract infections. Risk factors for disease include male gender, advanced age, and comorbid genitourinary tract pathology. Infections beyond the genitourinary tract are rare, though spondylodiscitis, perineal abscesses, lymphadenitis, bacteremia 2020-04-23 · The diagnosis of infective endocarditis (IE) remains a challenge. One of the rare bacterial species recently associated with biofilms and negative cultures in infective endocarditis is Aerococcus urinae. Whether the low number of reported cases might be due to lack of awareness and misidentification, mainly as streptococci, is currently being discussed.