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Two distinct types of non-A, non-B hepatitis in a cardiovascular surgical unit
Insights
Adults undergoing cardiovascular surgery had a high incidence of non-A, non-B hepatitis following blood transfusion. Two nosocomial hepatitis epidemics occurred, presenting with more severe clinical features and higher immune complex rates.
Area of Science:
- Hepatology
- Infectious Diseases
- Cardiovascular Surgery
Background:
- Non-A, non-B hepatitis posed a significant risk to patients undergoing cardiovascular procedures.
- Blood transfusions and extracorporeal circulation were identified as potential transmission routes.
Purpose of the Study:
- To investigate the incidence and characteristics of non-A, non-B hepatitis in cardiovascular surgery patients.
- To identify potential epidemic patterns and clinical differences.
Main Methods:
- Retrospective analysis of 204 patients undergoing open heart surgery between April 1979 and December 1981.
- Monitoring of hepatitis incidence, clinical features (ALT levels, icterus), and immune complex presence.
Main Results:
- Overall incidence of non-A, non-B hepatitis was 43% in adults (115 patients) and 21.8% in younger patients (89 patients).
- Two distinct nosocomial hepatitis epidemics were observed during the study period.
- Epidemic-associated hepatitis presented with more severe clinical manifestations and a significantly higher prevalence of immune complexes (80%) compared to non-epidemic cases (7.6%).
Conclusions:
- Cardiovascular surgery patients, particularly adults, are at high risk for non-A, non-B hepatitis post-transfusion.
- Nosocomial hepatitis outbreaks can occur, exhibiting distinct clinical and immunological profiles.
- Early identification and control measures are crucial to mitigate hepatitis transmission in hospital settings.
Abstract:
The incidence of non-A, non-B hepatitis in a cardiovascular surgical unit was examined among the 204 patients who received blood transfusion and extracorporeal circulation while undergoing open heart surgery during April 1979 to December 1981. Among 115 adult patients (20 to 69 years old) 46 (43%) developed non-A, non-B hepatitis, whereas the incidence in younger patients (1 to 19 years old) was much lower (21.8%, 19 out of 89). When monthly incidence was examined during the study period, two nosocomial epidemics, the first during September 1979 to February 1980 and second during October 1980 to January 1981, were found. When clinical features such as maximum ALT level and the proportion of icterus were examined, the features of the above two epidemics were taken to be different from those consistently observed through the study period. The epidemic type hepatitis not only resulted in more severe clinical features than the nonepidemic type, but the sera of the former contained immune complexes at a higher rate (80%) than did the latter (7.6%).