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1.  Coagulase-negative Staphylococcal Infections in the Neonatal Intensive Care Unit 
Background
Coagulase-negative staphylococci (CoNS) are the most commonly isolated pathogens in the neonatal intensive care unit (NICU). CoNS infections are associated with increased morbidity including neurodevelopmental impairment.
Objective
Describe the epidemiology of CoNS infections in the NICU. Determine mortality among infants with definite, probable, or possible CoNS infections.
Methods
We performed a retrospective cohort study of all blood, urine, and cerebrospinal fluid cultures from infants <121 postnatal days.
Setting
248 NICUs managed by the Pediatrix Medical Group from 1997 to 2009.
Results
We identified 16,629 infants with 17,624 episodes of CoNS infection: 1734 (10%) definite, 3093 (17%) probable, and 12,797 (73%) possible infections. Infants with lower gestational age and birth weight had a higher incidence of CoNS infection. Controlling for gestational age, birth weight, and 5-minute Apgar score, infants with definite, probable, or possible CoNS infection had lower mortality—OR=0.74 (95% confidence interval; 0.61, 0.89), OR= 0.68 (0.59, 0.79), and OR=0.69 (0.63, 0.76)—compared to infants with negative cultures (P<0.001). No significant difference in overall mortality was found in infants with definite CoNS infection compared to those with probable or possible CoNS infection—OR=0.93 (0.75, 1.16) and OR=0.85 (0.70, 1.03), respectively.
Conclusions
CoNS infection was strongly related to lower gestational age and birth weight. Infants with clinical sepsis and culture-positive CoNS infection had lower mortality rates than infants with clinical sepsis and negative blood culture results. No difference in mortality between infants diagnosed with definite, probable, or possible CoNS infection was observed.
doi:10.1086/660361
PMCID: PMC3238054  PMID: 21666399
nosocomial infection; infant; prematurity; Staphylococcus
2.  Candida Infective Endocarditis 
Purpose
Candida infective endocarditis (IE) is uncommon but often fatal. Most epidemiologic data are derived from small case series or case reports. This study was conducted to explore epidemiology, treatment patterns, and outcomes of patients with Candida IE.
Methods
We compared 33 Candida IE cases to 2716 patients with non-fungal IE in the International Collaboration on Endocarditis - Prospective Cohort Study. Patients were enrolled and data collected from June 2000 until August 2005.
Results
Patients with Candida IE were more likely to have prosthetic valves (p<0.001), short term indwelling catheters (p<0.0001), and have healthcare-associated infection (p<0.001). Reasons for surgery differed between the two groups: myocardial abscess (46.7% vs. 22.2% p=0.026) and persistent positive blood cultures (33.3% vs. 9.9%, p=0.003) were more common among those with Candida IE. Mortality at discharge was higher in patients with Candida IE (30.3%) when compared to non-fungal cases (17%, p=0.046). Among Candida patients, mortality was similar in patients who received combination surgical and antifungal therapy versus antifungal therapy alone (33.3% vs. 27.8%, p=0.26). New antifungal drugs, particularly echinocandins, were used frequently.
Conclusions
These multi-center data suggest distinct epidemiologic features of Candida IE when compared to non-fungal cases. Indications for surgical intervention are different and mortality is increased. Newer antifungal treatment options are increasingly used. Large, multi-center studies are needed to help better define Candida IE.
doi:10.1007/s10096-008-0466-x
PMCID: PMC2757733  PMID: 18283504

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