[Investigation on status of Oncomelania hupensis in schistosomiasis transmission-interrupted areas of Huangshan City].

Objective: To explore a new monitoring method for schistosomiasis transmission interrupted areas, so as to evaluate the monitoring results in counties (districts) to improve the quality.

Methods: Specialized technicians were selected as survey teams to investigate the status of Oncomelania hupensis snails with the random sampling method combined with environmental sampling method every year from 1997 to 2013.

Results: From 1997 to 2013, 118 villages of 38 townships of 21 counties were investigated for the snail status, and there were 18 environments with snails in 10 townships of 7 counties.

[Investigation on newly advanced schistosomiasis patients in schistosomiasis transmission-interrupted areas].

There were 240 newly advanced schistosomiasis patients in Huangshan City from 2004 to 2011. All the patients were clinically diagnosed and mainly distributed in the countries which were once heavy endemic areas in history. Most of the patients were diagnosed in 2007 and 2008, and those aged more than 60 years accounted for 79.

[Surveillance of schistosomiasis after its transmission being interrupted in Huangshan City, 1994-2010].

In Huangshan City, schistosomiasis surveillance from 1994 to 2010 showed that there were no patients and livestock newly infected with schistosome, no infected Oncomelania snails, but the snail status was stable. It is suggested that the schistosomiasis control strategy with emphasis on snail surveillance is effective, and snail surveillance is still a key measure of schistosomiasis surveillance in the future.