[Investigation on unhealthy related behaviors of echinococcosis patients in Garzê Prefecture, Sichuan Province].

OBJECTIVE: To understand the unhealthy related behaviors of echinococcosis patients in Tibetan region in Sichuan Province, so as to provide the references for the health education of echinococcosis. METHODS: The echinococcosis patients who were registered in the Tibetan region in Sichuan Province were selected as target population. The basic situation and unhealthy related behaviors of them were surveyed by individual interviews. RESULTS: Totally 368 echinococcosis patients were investigated. The proportion of patients who lived with dogs was 53.3%, who did not wash hands before meals was 23.4%, who ate raw food was 15.5%, who fed dogs with diseased livestock visceral organs was 9.8%, who drank unboiled water was 8.7%, and who played with dogs was 5.4%. The proportion of nomads' unhygienic behaviors was higher than that of sedentary residents' unhygienic behaviors. The proportion of playing with dogs and feeding dogs with diseased livestock visceral organsin students was higher than that in nomads. CONCLUSIONS: There are some unhealthy related behaviors in echinococcosis patients in Garzê Prefecture, and the different health education modes for echinococcosis patients with different characteristics should be applied.

Investigation on unhealthy related behaviors of echinococcosis patients in Garzê Prefecture,Sichuan Province / 中国血吸虫病防治杂志

Objective To understand the unhealthy related behaviors of echinococcosis patients in Tibetan region in Sich-uan Province,so as to provide the references for the health education of echinococcosis.Methods The echinococcosis patients who were registered in the Tibetan region in Sichuan Province were selected as target population. The basic situation and un-healthy related behaviors of them were surveyed by individual interviews.Results Totally 368 echinococcosis patients were in-vestigated.The proportion of patients who lived with dogs was 53.3%,who did not wash hands before meals was 23.4%,who ate raw food was 15.5%,who fed dogs with diseased livestock visceral organs was 9.8%,who drank unboiled water was 8.7%,and who played with dogs was 5.4%.The proportion of nomads'unhygienic behaviors was higher than that of sedentary residents'un-hygienic behaviors.The proportion of playing with dogs and feeding dogs with diseased livestock visceral organsin students was higher than that in nomads.Conclusion There are some unhealthy related behaviors in echinococcosis patients in Garzê Prefec-ture,and the different health education modes for echinococcosis patients with different characteristics should be applied.

[Effects and cost of four formulations of niclosamide ethanolamine salt in Oncomelania hupensis snail control in field].

OBJECTIVE: To investigate the effects and cost of four formulations of niclosamide ethanolamine salt in Oncomelania hupensis snail control in the field in marshland and lake regions, so as to provide the evidence for drawing up the plan of molluscicide using in schistosomiasis endemic areas. METHODS: One drainage channel and one channel without water in the same area with snails in Jiangling County, Jingzhou City were selected as the research fields. The drainage channel was divided into 9 sections, except one section as a blank control group where the natural death rate of snails was observed only, and the remaining 8 sections were taken as the observation groups, where different dosages of 4% niclosamide ethanolamine salt powder, 5% niclosamide ethanolamine salt granules, 25% niclosamide ethanolamine salt suspending agent, 26% metaldehyde and niclosamide ethanolamine salt suspending agent, and 50% niclosamide ethanolamine salt wettable powder were used respectively. The channel without water were divided into 4 sections, except one section as a blank control group, the other 3 segments were taken as the observation groups, where 4% niclosamide ethanolamine salt powder, 5% niclosamide ethanolamine salt granules, and 50% niclosamide ethanolamine salt wettable powder were used respectively. Before and after spraying molluscicide for 7 days and 15 days, the system sampling method was used to observe the effects of snail control. Meanwhile, the unit cost method was used to calculate the costs of the different mulluscicide formulations abovementioned in unit area (1 m2). RESULTS: In the field at the drainage channel, the snail mortality rates of the groups spraying 4% niclosamide ethanolamine salt powder (50 g/m2), 5% niclosamide ethanolamine salt granules (40 g/m2), 25% niclosamide ethanolamine suspending agent, 26% metaldehyde and niclosamide ethanolamine salt suspending agent, and 50% niclosamide ethanolamine salt wettable powder (2 g/m2 and 4 g/m2) for 7 days were 79.52%97.87%, while the rates after spraying for 15 days were 71.00%-96.30%, and compared with those before spraying, the differences were statistically significant (all P < 0.01). For the groups spraying with 2 g/m2 or 4 g/m2 suspending agent as well as wettable powder for 7 days, the snail mortality rates were significantly different (both P < 0.05). In the field at the channel without water, the snail mortality rates of the 3 observation groups after spraying molluscicide for 7 days were 97.14%-100%, while for 15 days were 94.32 %-100%, and compared with the rates before spraying, all the differences were statistically significant (all P < 0.01). The unit costs per 1 m2 of the molluscicide abovementioned were ranged from 0.280 Yuan to 0.416 Yuan. CONCLUSIONS: In marshland area inside embankment, the molluscicide formulations of the powder and granule are suitable for the environments without water or with instability water level, while the molluscicide formulations of the suspended agents and wettable powder are suitable for the water environment. Though the unit cost of powder is the lowest, the molluscicide in this formulation flies away seriously.

[Analysis of endemic situation of schistosomiasis in Jingzhou City from 2004 to 2014].

OBJECTIVE: To analyze the change of endemic situation of schistosomiasis in Jingzhou City of Hubei Province, so as to provide evidence for the development of future control strategy. METHODS: The data of endemic situation of schistosomiasis and the implementation of integrated control measures were collected and analyzed in the 9 counties (districts, cities) of Jing-zhou City from 2004 to 2014. RESULTS: The endemic situation of schistosomiasis appeared a decline year by year since 2004. The prevalence of human Schistosoma japonicum infection was 0.40% in 2014, which was reduced by 95.72% as compared to that in 2004, and the fitting exponential equation was y = 11.067e-0.240x. The incidence of acute schistosomiasis reduced to less than 0.5 per 100 000 in 2007. No acute infection was found since 2010, and no emergency epidemics occurred for successive 9 years. It was estimated that there were currently 22 547 people infected with S. japonicum, which reduced by 85.87% in relative to 2004. The prevalence of cattle S. japonicum infection reduced to 0 in 2014, with a 100% reduction as compared to that in 2004, and the fitting exponential equation was y = 15.69e-0.339 8x. The actual Oncomelania hupensis snail area was 31 084.00 hm2, which reduced of 1931.21 hm2 as compared to that in 2004, with a 5.91% reduction, and no schistosome-infected snails were found since 2012. Both human and animal schistosome infections reduced to less than 1% in all administrative villages in 2013. CONCLUSIONS: The implementation of the key schistosomiasis program and whole-county promotion and province-ministry joint integrated control program results in effective control of schistosomiasis in Jingzhou City. However, further control programs are required to consolidate the achievements, interrupt and eliminate schistosomiasis.

[Oncomelania hupensis snail control effects of molluscicides with different formulations in field in marshland and lake regions].

OBJECTIVE: To observe the Oncomelania hupensis snail control effects of molluscicides with different formulations in the ditch with unstable water level in field of marshland and lake areas, so as to provide the evidence for formulating the prevention strategies. METHODS: A drainage channel with O. hupensis snails in Jiangling County, Jingzhou City were selected as the study field, then it was divided into 6 segments, except 1 segment was treated as the blank control group for observing the natural mortality rate of the snails, the other 5 segments were treated as observation groups, where 4% niclosamide ethanolamine salt powder, 5% niclosamide ethanolamine salt granule, 25% suspension concentrate of niclosamide ethanolamine salt, 26% suspension concentrate of metaldehyde and niclosamide ethanolamine salt, 50% niclosamide ethanolamine salt wettable powder were applied respectively. Before and after the mollusciciding, the snail surveys were carried out through the systematic sampling method, and the short- and long-term effects of snail control were observed, and the mortality rates of the snails on the slope above the water level and those below the water level were compared. RESULTS: When 7 d and 15 d after mullusciciding, the mortality rates of snails on the slope above the water level in each observation group were 79.52%-97.87% and 90.43%-96.30%, respectively, when compared with those before mollusciciding, all the differences were statistically significant (all P < 0.01). When 7 d after mullusciciding, the mortality rates of snails below the water level in each observation group were 17.11%-50.00%, which were all lower than those of the snails on the slope above the water level in the corresponding groups (all P ＜ 0.05); when 15 d after mullusciciding, the rates were 9.43%-95.24%, and those in 25% suspension concentrate of niclosamide ethanolamine salt, 26% suspension concentrate of metaldehyde and niclosamide ethanolamine salt, 50% niclosamide ethanolamine salt wettable powder groups were all lower than those of the snails on the slope above the water level in the corresponding groups (all P ＜ 0.01). Compared with the densities of living snails before mollusciciding, those 6 months after mollusciciding in each observation group decreased by 70.21%-78.98%. CONCLUSIONS: The molluscicides in the formulation of powders and granule are suitable for both the snail environment with or without water, while those in the formulation of suspension agents and wettable powders are suitable only for environments with water.