1.   Their diagnostic relevance, however, has been questioned recently following the detection of signs of hepatitis C virus infection in autoimmune chronic hepatitis patients.

2.   Such detections could be followed up by other missions.

3.   In recent months, the stock exchange has shut down trading three times following detection of irregularities.

4.   The government Thursday sought to allay fears among consumers and export markets following the detection in Japan of a second case of mad cow disease.

5.   The United Nations has stopped transporting returning refugees from Goma in Zaire following the detection of cholera among people brought to Kigali Sunday by UN trucks.