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Table 1 Epidemiological data.

From: Patient-to-patient transmission of hepatitis C virus (HCV) during colonoscopy diagnosis

Patient C1 C2 C3
Type of case Prevalent Incident Incident
First symptoms Asymptomatic 17/01/2006 26/01/2006
HCV-negative test No 12/12/2005 22/09/2004
HCV subtype 1b 1b 1b
Previous risk factors    
   Contact with HCV (3 years) No Yesa No
   Invasive diagnose or treatment Colonoscopy (2001) Acupuncture (Feb.-July 2005) No
   Surgery Caesareas
(1984 and 1987)
No No
Risk factors at the endoscopy unit    
   Admission day 19/12/2005 19/12/2005 19/12/2005
   Blood collection and intravenous line insertion: order 1st 3rd 2nd
   Sedation and colonoscopy: order 1st 2nd 3rd
   Biopsy No No Yesb
  1. Patient report and nosocomial risk factors
  2. a Contact with HCV-positive patient.
  3. b Polypectomy.