It's compared, as control, with two patients HCV negatives from the same unit. Is collected antecedents 6 months previous of raises aminotransferases, transfusions, surgery, central vein catheterization, risk outpatient, (DAVP)and tattoo, living together with other HCV + person.

In case to be a centre with isolation measures we evaluated if is dialysed next to a HCV+ patients and in some moment could have not been adequate isolate.

Seroconversions	HCV Neg.	Controls	p
Mean age (years)	61,4 years	62,2 years	p.n.s
Gender (% F/M)	39% - 61%	41% - 59%	p.n.s
Mean months HD	40,6 months	41,9 months	p.n.s
% increase aminotransf	65,1%	6%	0,00000

Rise of aminotransferases level appear as a good predictor from the possible SC, therefore the periodic monitorization selframe must be binding obliged.

ANTECEDENT	Odd Ratio	C I	p
Transfusión	1,62	(0,99 - 2,65)	0,042
Surgery	1,27	(0,78 -2,09)	p.n.s
Catheterization	1,93	(1,12 - 3,31)	0,01
Risk outpatient	1,17	(0,61 -2,22)	p.n.s
HCV+ relative	5,23	(0,97 - 37,27)	0,02
Next to HCV+ monitor	1,33	(0,7 - 2,3)	p.n.s
Contact with HCV+monitor	2,94	(1,35 - 6,42)	0,002

Results

Although with small OR appear as risk factor the central vein catheterisation and transfusion there is to detail that 29% of the sample present transfusion antecedent. Hardly is had communicated case of DAVP neither tatoo. We find a HCV+ big adding in the families of patients seroconverted.

We find a significant correlation in every year of the study between SC and the centre prevalence, showing the centres with a number higher than 3SC the highest prevalence.

We didn't find in our study, higher risk in the patients dialysed next to HCV+ monitor, so the factor nursery as horizontal transmission of the HCV, must beat in mind , and insist in the importance to and extreme the Universal Precaution, overall in centres with high prevalence.