Catheter-Related InfectionsCandidemiaBacteremiaCross InfectionTertiary Care CentersCatheterization, Central VenousIntensive Care UnitsCatheters, IndwellingHemofiltrationSepsisRetrospective StudiesAnti-Bacterial AgentsProspective StudiesIncidenceStaphylococcus haemolyticusFormiminoglutamic AcidRiversBloodTime FactorsInjections, IntravenousCandidaLeukocytesInfant, NewbornStaphylococcal InfectionsCell MovementLiverFresh WaterRabbitsMicrobial Sensitivity TestsCells, CulturedRisk FactorsWater MovementsSeasonsEcosystemCohort StudiesWater PollutionInvertebratesAge DistributionFollow-Up Studies