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It is reported in the literature titled "risk of infection transmission in curvilinear array echoendoscopes: results of a prospective processing and culture registry", 22/540 cultures of linear endoscopic ultrasound (eus) (4,2%) were positive for gram-negative bacilli after cleaning and high level disinfection (hld).Beginning in february 2015 to february 2016, curvilinear array (cla) echoendoscopes at a single tertiary care center underwent prospective bacterial surveillance cultures after reprocessing.Any growth of gram-negative bacilli was considered to be critical.Echoendoscopes with a positive result underwent quarantine followed by repeat disinfection and culture.During the study period, 540 cultures were obtained; 521 (96.5%) were primary cultures obtained from 18 cla echoendoscopes.Twenty-two primary cultures (4.2%) were positive for gram-negative bacilli after high-level disinfection reprocessing.Eleven different bacteria were isolated: klebsiella pneumoniae, citrobacter freundii, escherichia coli, pseudomonas aeruginosa, klebsiella oxytoca, sphingomonas paucimobilis, acinetobacter baumanii, enterobacter cloacae, hafnia alvei, pseudomonas putida, and stenotrophomonas maltophilia.Antibiotic sensitivity data on 19 of 24 bacteria (79.2%) isolated from positive primary cultures revealed no documented cases of carbapenem resistant enterobacteriaceae, cephalosporin-resistant-klebsiella, or multidrug-resistant acinetobacter.There have been no documented cases of patient-to-patient transmission.Conclusions: after following standard high-level disinfection and reprocessing, cla echoendoscopes can remain culture positive for high-concern organisms.Recommendations regarding infection risk should take into consideration elevator-containing echoendoscopes in addition to duodenoscopes to ensure patient safety and endoscope reprocessing efficacy.Case with patient identifier (b)(6) reports gf-uc140p-al5 scopes testing positive after hld, case with patient identifier (b)(6) reports gf-uct 180 scopes testing positive after hld, and case with patient identifier (b)(6) reports gf-uct140 scopes testing positive after hld.
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