Blood-Transmitted and Clotting-Factor-Transmitted Non-A, Non-B Hepatitis

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Abstract
In a prospective study of post-transfusion hepatitis (PTH) in open-heart surgery patients, non-A, non-B hepatitis was diagnosed by exclusion criteria in 100 patients (14.1%). The frequency of hepatitis was significantly higher (56.9%; p less than 0.001) in patients receiving blood units and clotting-factor concentrates of commercial origin, which were administered for the occurrence of bleeding complications during surgery, as compared to patients treated with blood units alone (10.3%). When clinical features of hepatitis at presentation were compared in the two groups of patients, a shorter incubation period (p less than 0.05) and a higher prevalence of jaundice (p less than 0.01) were found in patients receiving blood and clotting-factors. Persistence of abnormal alanine aminotransferase (ALT) levels after 12 months from onset were found in more than 70% of patients in both groups. Late biochemical remission, however, was observed in 21% of patients receiving blood units alone, but in none of those who received clotting factors. All these latter patients had histologic features of active liver disease during the chronic phase of the illness, as compared to only 46% of patients receiving blood units alone (p = 0.02). Our results show significant differences in the clinical course of non-A, non-B hepatitis transmitted by blood as compared to clotting factors, supporting the hypothesis of different etiological non-A, non-B agents.

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