Achromobacter xylosoxidans respiratory tract infections in cystic fibrosis patients.

Achromobacter xylosoxidans is a ubiquitous Gram-negative non-fermenting rod, recently characterized as an emerging pathogen in cystic fibrosis (CF) patients. Its pathogenic potential and prevalent transmission routes are still unclear. This study investigated the PFGE genetic pattern and antimicrobial resistance profile of 42 A. xylosoxidans isolates obtained over 4 years from the respiratory tract of 22 CF patients. By genotypic analysis, 31 isolates were attributed to 8 distinct PFGE patterns (A-H), whereas 11 isolates were not typable because their DNA was not restricted by XbaI and DraI restriction enzymes. The majority of the isolates showed multidrug resistance; imipenem and piperacillin were the most active drugs. During the course of A. xylosoxidans chronic infection forced expiratory volume and body mass index values were not significantly lowered. The demonstration of widespread antibiotic resistance underscores the importance of antibiogram-directed therapy. Our data suggest that in some cases the infection may have been acquired from other patients or from a common contaminated source. Further epidemiological studies may be important for the design and implementation of prophylactic measures in CF centers.

Totally implantable central venous access ports in patients with cystic fibrosis: a multicenter prospective cohort study.

PURPOSE: The aim of this study was to assess the incidence of late onset complications of totally implantable venous access devices (TIVAD) in patients with cystic fibrosis (CF) and to investigate possible associations between the rate of complications and different policies of TIVAD management. METHODS: A multicenter prospective cohort study was performed in 11 Italian CF Centers. Patients with CF and a TIVAD were recruited and followed-up. RESULTS: The study commenced on May 2008 and ended on September 2010. Eighty subjects were studied (77.5% women--mean age 27.2 years). Eighteen late complications of ports were observed (22.5%; incidence 0.96 per 1000 days of observation): three lumen occlusions, seven catheter-related infections , three port-related venous thrombosis, in addition to five other complications. A statistically significant association was found between the onset of catheter-related infection and the presence of CF-related diabetes (CFRD) (P=.0064) CONCLUSIONS: Our data suggest that TIVADs represent a safe and effective device for the intermittent IV administration of drugs in people with CF. However, people with CFRD have a higher risk of developing TIVAD-related infection.