| epidemiological evidence for vaccinating wastewater treatment plant workers against hepatitis a and hepatitis b virus. | exposed to sewage workers of a wastewater treatment plant and a control group in thessaloniki, greece, were examined for antibodies against hepatitis a (anti-hav) and hepatitis b virus (hbv) infection markers. the main objective of this study was to investigate for epidemiological evidence so as to recommend vaccination of the occupationally exposed workers against these viral infections. antibodies against hepatitis a virus were detected in 65.7% of the wastewater treatment plant workers and in ... | 2004 | 15117120 |