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Alexander et al1 have recently reported the prevalence of Neisseria gonorrhoeae negative for proline iminopeptidase (Pip) in England and Wales. This is a considerable problem given that many commercial biochemical test panels (Gonochek II, API NH or RapidID NH) monitor the presence of this enzyme and generate a false-negative identification.1–3 As data are scarce, we present our findings of the past 4 years.
A total of 143 isolates from consecutive patients were received during a 4-year period (2003–2006) at the Regional Laboratory for Gonococci, Hospital Monte Naranco, Oviedo, Spain. This unit receives all the isolates of N gonorrhoeae in Asturias, a regional county in the north of Spain with a population of …
LO was responsible for initiation of the study and the isolate screening methods; HV, JD-G, MA-A and FC were responsible for the isolate screening methods; FV was responsible for the initiation, supervision and elaboration of the study.
Competing interests: None.