[Surveillance of schistosomiasis 34 years after transmission interruption in Songjiang District, Shanghai City].

Objective: To analyze the surveillance data after schistosomiasis transmission interruption from 1985 to 2018, so as to provide scientific basis for the future prevention and control of schistosomiasis.

Methods: The data pertaining to snail survey, surveillance of schistosomiasis in humans and livestock, and health education were collected and analyzed in Songjiang District after schistosomiasis transmission interruption from 1985 to 2018.

Results: From 1985 to 2018, there were 8 townships, 68 villages and 1 462 settings with snails in Songjiang District, covering an area of 96.

[Historical snail environments in Baoshan District, Shanghai City].

Objective: To understand the distribution and characteristics of historical snail environments in Baoshan District, Shanghai City, so as to provide the reference for adjusting and formulating the monitoring program of the snail situation in the future.

Methods: A retrospective survey and a field survey were conducted to collect the information of historical snail environments and set up the database. The distribution and characteristics of them were analyzed.

[Risk analysis of imported schistosomiasis in Shanghai City from 2005 to 2015].

Objective: To understand the risk situation of imported schistosomiasis and its main influencing factors in Shanghai City from 2005 to 2015.

Methods: A retrospective survey was performed, and the database was established based on the data collection of imported schistosomiasis, snail situation and mobile population in Shanghai City from 2005 to 2015.

Results: From 2005 to 2015, the mobile population in Shanghai City increased by 123.

[Simulation experiment of survival and reproduction of artificially imported Oncomelania snails in Qingpu District, Shanghai].

Objective: To understand the survival of imported Oncomelania snails in new environments with different densities in waterway net region, Qingpu District, Shanghai.

Methods: The snails collected from Guichi, Anhui Province were put into the ponds of 4 square meters and each had 25, 50, 100, 200, 400 and 800 pairs of snails, respectively. During the next 2 years, the temperature, humidity, the activities of snails and their second birth snails were investigated each day.

[Retrospective investigation of formation of large-scale Oncomelania snail-ridden area in Maogang Town, Songjiang District, Shanghai City].

Objective: To explore the influencing factors of the formation of large-scale Oncomelania snail situation in Maogang Town, so as to provide the scientific evidence for improving snail surveillance in Shanghai.

Methods: The data about the geography, construction and use of floodgate, and snail status of Maogang Town and its surrounding areas, as well as the meteorology and hydrology of Songjiang District were collected and reviewed, and the factors influencing the formation of snail status were analyzed.

Results: The condition of water, soil and temperature in Maogang Town was suitable for snail breeding.

[Potential risks for transmission of schistosomiasis caused by mobile population in Shanghai].

Objective: To understand the potential risk for schistosomiasis transmission caused by introduction of infection source from mobile population in Shanghai.

Methods: Field investigation was conducted in the suburb of Shanghai City by screening the mobile population living in Shanghai for more than 1 month and over 1 years old in a procedure of interviewing, serum indirect hemagglutination (IHA) test, and then fecal examination to detect the eggs with nylon sedimentation approach for those IHA positives.

Results: Among 2,931 mobile people investigated, 1,575 were male (53.

[Effects of atrial excitable period on the stability of atrial fibrillation in goats].

Objective: To investigate the effects of atrial excitable period (EP) on the stability of atrial fibrillation (AF) in goats.

Methods: Ten female goats were instrumented with epicardial electrodes patches on the left atrium (LA) free wall. AF was induced and maintained by a home-made stimulator with frequency of 50 Hz at a 1-second duration and a 2-seconds interval.