A novel complex class 1 integron found in a Klebsiella pneumoniae isolate from Portugal

Klebsiella pneumoniae Kp1 carrying a novel complex class 1 integron was isolated from an inanimate surface of a female ward sanitary facility in the Hospital Infante D. Pedro, Aveiro, central Portugal. The integron consists of two variable regions (VRs); VR1 was previously described in Escherichia coli and Vibrio cholerae, and VR2 contains an ***ln37-like structure and is located downstream of an ISCR1 element. The integron was found on a plasmid of 225 kb. The qnrB10 gene, although present, is not associated with the complex class 1 integron.