[Investigation of infections of soil-transmitted nematodes in Fusheng Village of Poyang Lake area in Jiangxi Province].

OBJECTIVE: To understand the status of soil-transmitted nematode infections in Poyang Lake area in Jiangxi Province. METHODS: The parasitic eggs of stools of residents aged 6-65 years were detected with the Kato-Katz technique in Fusheng Village of Poyang Lake area in Jiangxi Province in 2008. RESULTS: In 2008, the total average infection rate of soil-transmitted nematodes was 37.97%, and the infection rates of Ascarid lumbricoid, Trichuris trichiura and hookworm were 20.39%, 6.67% and 18.45%, respectively. The total infection rate of soil-transmitted nematodes and the rate ofA. lumbricoid were higher in the female than in the male with a statistically significant difference (P < 0.01). The infection rates of T. trichiura and hookworm in the female were higher than those in the male, but there was no significant difference between them (P > 0.05). The total infection rate of soil-transmitted nematodes and the rate of hookworm in different age groups had a similar change pattern which had an increasing trend with the age growing. The infection rate ofA. lumbricoid was the lowest in the age group of 10-19 years and was the highest in the age group of 20-29 years, and then the rate showed a gradually declining trend with the age increasing. The infection rate of T. trichiura had a decreasing trend as the age grew with 2 peaks in the age groups of 10-19 and 40-49, respectively. CONCLUSIONS: The infection rates of soil-transmitted nematodes in population of Fusheng Village in Jiangxi Province are still high. The effective control measures include health education, regular anthelminthic treatment, innoxiously processing of stool and environment reform, and the interruption of the transmitting chain is the fundamental strategy.

[Effect of health education on prevention from schistosome infection in engineering construction workers in Poyang Lake area].

OBJECTIVE: To evaluate the effect of health education on prevention from schistosome infection in engineering construction workers in Poyang Lake area. METHODS: The workers for constructing "De Chang" highway in Poyang Lake area were divided randomly into an experiment group and a control group, "health education + protective skill training" was carried out in the experiment group, whereas, no intervention was implemented in the control group. RESULTS: In the experiment group, the awareness rates of schistosomiasis control knowledge were 7.96% and 96.39% before and after the intervention, respectively; the rates of contacting infested water were 100% and 1.77% pre- and post-intervention, respectively; the work protective rates increased from zero before the intervention to 100% after the intervention; there was no person infected with schistosome after the intervention. However, in the control group, all the indexes above-mentioned had no significant changes. CONCLUSION: The intervention model "health education + protective skill training", can effectively prevent from schistosome infection in engineering construction workers in Poyang Lake area.

[Investigation on transmission factors of schistosomiasis after replacement of bovine with machine in Jinxian County].

OBJECTIVE: To understand the changes of transmission factors of schistosomiasis after the control strategy of replacing bovine with machine was implemented in the lake region, so as to provide the evidence for long-effective management in marshlands. METHODS: Two villages, which had carried out the control measure of replacing bovine with machine, were selected as observed villages. The data of endemic situation before and after the replacement were collected and analyzed. The species, activities, and stool distributions of infectious resources were surveyed. RESULTS: After the replacement was implemented in 2005, the densities of infected Oncomelania snails gradually decreased in the marshlands from 2006 to 2008; in 2009 and 2010, the densities of infected snails were both zero. The positive rates of stool examinations of residents in the villages decreased from 11.35% in 2004 to 0 in 2009 and 2010. There was still bovine and pig grazing on most of the marshlands, and 41 wild stools were examined with the negative results. CONCLUSION: After replacing bovine with machine is implemented, the marshlands are cleaned continuously, but there are still a few livestock on the marshlands which need to be managed.