BACKGROUND: @entity3064 is one of the most prevalent causes of severe hospital-acquired @entity281 and is responsible for the dramatic increase in @entity2893 resistance in Croatia in the last 5 years. Such data have encouraged multicenter research focused on the organism's ability to form biofilm, susceptibility to antibiotics, and particular genotype lineage. METHODS: Biofilm formation in 109 unrelated clinical isolates of A. baumannii recovered in six cities of Southern Croatia was investigated. Genotyping was performed by pulsed-field gel electrophoresis and antibiotic profile was tested by applying the disc diffusion method and confirmed by determining the minimum inhibitory concentrations. The ability to form biofilm in vitro was determined from overnight cultures of the collected isolates on microtiter plates, after staining with @entity1686 , and quantified at 570 nm after solubilization with @entity1068 . The statistical relevance was calculated in an appropriate program with level of statistical confidence. RESULTS: There was no significant difference in biofilm formation due to the genotype lineage. Isolates collected from intensive care units (ICUs) and isolated from respiratory samples were more likely to create a biofilm compared with isolates from other departments and other samples. There was a significant difference in the ability to produce biofilm in relation to antibiotic resistance pattern. A large proportion of A. baumannii isolates that were resistant to @entity869 / @entity5899 , carbapenems, and @entity4509 were found to be biofilm-negative. In contrast, isolates susceptible and intermediately susceptible to @entity869 / @entity5899 , carbapenems, and @entity4509 were biofilm producers. CONCLUSION: Clinical isolates of A. baumannii from respiratory samples in ICUs with a particular susceptibility pattern are more prone to form biofilm.

XXXX in Southern Croatia: clonal lineages, biofilm formation, and resistance patterns.

@entity5899 :: ('MESH:D013407', 'Chemical') :: ['sulbactam'] @entity1686 :: ('MESH:D005840', 'Chemical') :: ['crystal violet'] @entity4509 :: ('MESH:D000583', 'Chemical') :: ['amikacin'] @entity281 :: ('MESH:D007239', 'Disease') :: ['infections'] @entity2893 :: ('CHEBI:46765', 'Chemical') :: ['carbapenem'] @entity869 :: ('MESH:D000667', 'Chemical') :: ['ampicillin'] @entity3064 :: ('470', 'Species') :: ['Acinetobacter baumannii'] @entity1068 :: ('MESH:D000431', 'Chemical') :: ['ethanol']
@entity3064 :: (470,Species) :: ['Acinetobacter baumannii']
