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Objective To investigate the prevalence and risk factors of hookworm infections among vegetable growers in Anhui Province, so as to provide the evidence for formulating the control strategy and interventions for hookworm human infections.. Methods A total of 1 179 vegetable growers were randomly sampled from 7 counties in Anhui province according to the natural ecological function areas in 2018 and 2019, and the basic features and risk factors of hookworm infections were collected from all subjects using a self-designed questionnaire, including living environment, vegetable planting and fertilization, type of household crops, animal feeding, hygiene and labor habits. In addition, stool samples were collected from all participants, and each stool sample was subjected to twice tests with the Kato-Katz technique. The risk factors of hookworm infections were identified among vegetable growers with the Bayesian log-binomial regression model. Results The prevalence of hookworm infection was 3.90% among the 1 179 vegetable growers. The prevalence of hookworm infection was 10.07% (15/149) among unemployed subjects, 5.32% (31/583) among farmers, and 0 among full-time vegetable growers (0/377) and subjects with other occupations (0/70), and there was a significant difference among subjects in terms of occupation (χ2=36.37, P < 0.01). Bayesian log-binomial regression analysis showed that fertilization with human feces [relative risk (RR)=18.25, 95% confidence interval (CI): (4.31, 77.17)], barefoot labor in vegetable fields [RR=2.86, 95% CI: (1.43, 5.70)], and living in plain ecological areas along the middle and lower reaches of the Yangtze River [RR=4.19, 95% CI: (1.19, 14.81)] were independent risk factors of hookworm infections among vegetable growers. Stratified analysis showed that fertilization with human feces, barefoot labor in vegetable fields, drinking well water or mountain spring, and living in plain ecological areas along the middle and lower reaches of the Yangtze River were independent risk factors of hookw, orm infection among farmers, and living in plain ecological areas along the middle and lower reaches of the Yangtze River and growing rice were independent risk factors of hookw, orm infection among unemployed individuals. Conclusions The prevalence of hookworm infection is high among vegetable growers in Anhui Province, and fertilization with human feces, barefoot labor in vegetable fields and living in plain ecological areas along the middle and lower reaches of the Yangtze River are risk factors of hookw, orm infections among vegetable growers.
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Objective: To determine the values of diffusion-weighted magnetic resonance imaging [DWI] parameters on differential diagnosis of benign and malignant ovarian tumours with solid and cystic components
Study Design: An observational study
Place and Duration Of Study: Department of Radiology, Obstetrics and Gynecology Hospital of Fudan University, China, from January to December 2017
Methodology: Forty-four cases of malignant and benign ovarian tumours were selected as respective groups. Inclusion criteria were ovarian masses found by pelvic and abdominal imaging examination. Exclusion criteria of two groups were endometriosis and pelvic inflammatory diseases found by relevant examination, those with chronic diseases, tumors in other organs found by relevant examination, and those with family cancer history. Conventional MRI plain scans, enhanced scans and DWI scans, were performed after admission. Apparent diffusion coefficient [ADC] and exponential apparent diffusion imaging [eADC] of solid lesions of two groups were recorded and compared
Results: Solid ADC in malignant group was lower than that in benign group [p<0.001]. Solid eADC in malignant group was higher than that in benign group [p<0.001]
Conclusion: Diffusion-weighted magnetic resonance imaging is of high application value in the differential diagnosis of benign and malignant ovarian tumours with solid and cystic components, and it is worthy of promotion and application
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Objective To investigate the clinical characteristics of tubal stump pregnancy, and to assess the value of interventional embolization in preventing tubal stump pregnancy. Methods Among the patients who were planned to receive preoperative treatment of hydrosalpinx before the performance of in vitro fertilization-embryo transfer (IVF-ET) at authors' hospital, 35 patients had stump of fallopian tube. Of the35 patients, previous surgery of unilateral fallopian tube was present in 28 and previous surgery of bilateral fallopian tubes in 7. The length of tubal stump ranged from 10mm to 45mm, with a mean of 25mm. Interventional embolization with micro-coils was carried out in all patients, after which IVF-ET was performed. The pregnancy rate and ectopic pregnancy rate were calculated. Results Embolization of both fallopian tubes was successfully accomplished in all 35 patients. The IVF-ET pregnancy rate was 48.5％ (17/35), and no tubal stump pregnancy occurred. Conclusion The use of interventional embolization to occlude tubal stump can effectively avoid the occurrence of tubal stump pregnancy.
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Objective To understand the successive dynamic change of population structure of Oncomelania hupensis during a one-year period,so as to provide the evidence for snail control. Methods A river beach and a ditch infested with O. hupensis snails were selected and longitudinally investigated in the midmonth during one year. The snail survey indices included the sur-vival status,gender,number of whorls,length and width of shell,and gonad development status(measured by the color depth of gonad and the length ratio of gonad to liver),and the monthly snail eggs in the soil were collected and counted simultaneous-ly. In addition,the temperature and humidity of the soil and the daily data of air temperature and precipitation were measured or collected during the study period(every month). Results Both survival rate of snails and live snail density at the two environ-ments were positively correlated with the temperatures of air and soil. With a slight bimodal distribution ,the snail survival rate peaked from May to June,and in September. The living snail densities got the highest level in July and September in the river beach,and from April to May in the ditch. The regression equations of snail length(L)and width(W)were Lbeach = 2.355 +1.678W(F=2989.43,P<0.01)and Lditch=0.478+2.091W(F=2.989.43,P<0.01),respectively. The snails were the ones with 4.07-11.81 mm in the length(8.98 ± 0.92)mm in the river beach,and the snails were the ones with 3.63-9.92 mm in the length(7.03 ± 0.82)mm in the ditch. The main snails were the ones with five to eight whorls of shell in the river beach and four to seven whorls of shell in the ditch. The proportions of snails with less than or equal to five whorls(in the river beach)and four (in the ditch)were the highest in May and September,about 20％. The ratios of male and female snails were 1.66 in the river beach and 1.22 in the ditch,respectively. The gonad development status of male and female snails was basically synchronous and had a bimodal abundance period-from April to May and September to October. The numbers of snail eggs in the soil among months were significantly different,reaching the highest in June in the river beach(100.8/0.1 m2),and May in the ditch(82.5/0.1 m2). Conclusion The principal periods of breeding and alternation of generations of snails are April-May and September-October every year,which should also be the optimal time for mollusciciding in schistosomiasis susceptible zones.
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<p><b>OBJECTIVE</b>To investigate the changes of water level and the distribution of snails in Anhui province before and after runs of the Three Gorges Reservoir Project, and to determine the relationship between the two factors and schistosomiasis transmission.</p><p><b>METHODS</b>The hydrologic data of Datong hydrologic station and the data of snail status and schistosomiasis morbidity in Anhui Province were collected. The data from 1991 to 2002 and 2003 to 2012 were considered as before and after the impoundment of the Three Gorges Reservoir Project. Based on the prevalence of schistosomiasis, the cases of people and cattle were speculated, and the average infection rate of people and cattle were calculated. The t-test was used to compare the difference of snail area and the density of living snails before and after the impoundment of the Three Gorges Project. The pearson method was used to analyze the relationship between water level and snail area. The spearman method was used to analyze the relationship between the water level and the distribution of snails.</p><p><b>RESULTS</b>From 1991 to 2012, the range of the highest water level, the lowest water level, the difference between the highest and lowest water level, the mean in the abundant water seasons, the mean in the dry water seasons, and the difference between the abundant water seasons and the dry water seasons was 11.40-16.30, 3.68-5.20, 6.70-12.12, 9.92-14.40, 4.77-7.64 and 4.13-8.93 m, respectively. The snail areas was (28 613 ± 362) hm² and (29 477 ± 918) hm² (t = -3.00, P = 0.007), the density of living snails was 1.51 (1.15-2.43) and 0.43 (0.29-1.10) snails/0.11 m² (H = 4.28, P < 0.001) before and after the impoundment of the Three Gorges Project, respectively. The average infection rate of people and cattle was 1.68% (99 482/5 935 147) and 4.62% (13 923/3 011 33), and the average number of acute schistosomiasis cases was 328, before the impoundment of the Three Gorges Project; 0.60% (39 747/6 649 380), 1.65% (1 291/783 224) and 71 after the impoundment of the Three Gorges Reservoir Project, respectively. The snail areas had negative correlation with the highest water level, the difference between the highest and lowest water level, the mean in the abundant water seasons (r value was -0.514, -0.509 and -0.477; P value was 0.014, 0.015 and 0.025, respectively). The infection rate of people had positive correlation with the highest water level, the difference between the highest and lowest water level, the mean in the abundant water seasons (r value was 0.532, 0.587 and 0.446; P value was 0.011, 0.004 and 0.038, respectively). The infection rate of cattle had positive correlation with the highest water level, the difference between the highest and lowest water level (r value was 0.507 and 0.553; P value was 0.016 and 0.008, respectively). The number of acute schistosomiasis cases had positive correlation with the highest water level, the difference between the highest and lowest water level (r value was 0.481 and 0.486; P value was 0.023 and 0.022, respectively).</p><p><b>CONCLUSION</b>Following the runs of the Three Gorges Reservoir Project, the change of water level in the section of Anhui Province affected the distribution of snails and the infection of people and cattle to some extent. The snail areas showed an upward trend, and the density of living snails, the infection rate of people and cattle showed a downward trend. The runs of Three Gorges Reservoir Project has certain role to reduce flood and helpful for schistosomiasis control.</p>
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Animals , Cattle , Humans , China , Floods , Lakes , Prevalence , Rain , Schistosomiasis , Seasons , SnailsABSTRACT
Objective To investigate the status of Cryptosporidium infection in the population in the local area of Anhui Prov?ince,and discuss the risk factors of the infection,so as to provide the evidence for the prevention and treatment of cryptosporidi?osis. Methods Qianshan County and Lingbi County of Anhui Province were selected as investigation spots,and the oocysts of Cryptosporidium in the feces of the investigation objects and the specific IgG antibody against Cryptosporidium in the serum were checked by using the pathogenic modified acid fast staining method and ELISA,respectively,so as to determine the status of Cryptosporidium infection in these investigation objects. At the same time,the questionnaire surveys were conducted in the inves?tigation objects so as to know about the risk factors of Cryptosporidium infection. Results A total of 668 people were investigat?ed in the two counties,635 people received etiological examinations,and 15 people were positive with the positive rate of 2.36%;642 people received serological examinations,and 140 people were positive with the positive rate of 21.81%;628 peo?ple received pathogenic and serological examinations at the same time,and the examination results of the both methods showed that 12 people were positive(there were 4 people in Qianshan County and 8 people in Lingbi County),and the positive rate was 1.94%. The rates of Cryptosporidium infection in the population of Qianshan County and Lingbi County were 1.24%(4/322)and 2.71%(8/295)respectively,and the difference had no statistical significance(P>0.05). The single factor analysis found that the rate of Cryptosporidium infection was higher in the children and diarrhea patients;the multivariate logistics regression analy?sis indicated that the rate of Cryptosporidium infection was higher in the people who bred poultry and the diarrhea patients. Con?clusions The positive rate of serum antibody of Cryptosporidium in the population of the local area of Anhui Province is higher, which indicates that the previous infection is serious,and the rate of Cryptosporidium infection in human is relative to the age, diarrhea and whether there are poultries to be bred in the family,which is worthy of attention in the future prevention and treat?ment.
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This study aimed to analyze the effect of the external method of tonifying kidney and promoting blood circulation on endometrial morphology of rats with kidney deficiency and blood stasis model. A total of 50 normal healthy unmated female SD rats of proestrus were selected with vaginal smear. Rats were randomly divided into the blank group, model group, high dose group and low dose group with the prescription of tonifying kidney and promoting blood circulation and theWu-Zi (WZ) group. Except the blank group, intragastric administration of hydroxyurea was given to other group to establish the kidney deficiency model. Meanwhile, clyster of distilled water was given to the blank group and the model group. And clyster of high dose and low dose prescription of tonifying kidney and promoting blood circulation was given to the high dose and low dose group, respectively. The intragastric administrations ofWu-Zi Yan-Zong(WZYZ) pills were given to theWu-Zi (WZ) group. On the 4th day of pregnancy, 10% of the macromolecule dextran was quickly injected to the caudal vein to induce blood stasis model 1 hour after the last medication administration. The uterus tissue section was observed by HE dyeing. The results showed that the thickness of covering epithelium of endometrium in the model group was lower than the blank group (P < 0.05). There were significant differences on the thickness of covering epithelium of endometrium in the high dose group and low dose group with the prescription of tonifying kidney and promoting blood circulation, the WZ group and the model group (P < 0.01). The sum of gland number and gland area as well as the maximum diameter / minimum diameter of the model group was significantly lower than that of the blank group (P< 0.05, orP < 0.01). The shape factor was the closest to “1”, which had significant difference compared with the blank group (P < 0.01). Compared with the model group, the sum of gland number and glandular lumen of the high dose and low dose group were increased at different levels (P < 0.05, orP < 0.01). The sum of gland number, glandular lumen area, shape factor, and maximum diameter / minimum diameter of WZ group had significant difference compared with the model group (P < 0.05, orP < 0.01). The sum of interstitial cells’ nucleus area, integral optical density of interstitial cells’ nucleus and number of interstitial blood vessels in the high dose and low dose group were significantly higher compared to the model group (P < 0.05, orP < 0.01). The sum of interstitial cells’ nucleus area and the integral optical density of interstitial cells’ nucleus in the WZ group were obviously higher than the model group (P < 0.01). It was concluded that the external method of tonifying kidney and promoting blood circulation can effectively improve the endometrial morphology of kidney-deficiency and blood-stasis rat model, promote the synchronous development of endometrial gland and stroma, in order to play a role to improve the endometrial receptivity.
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Objective To analyze the changes of schistosomiasis endemic situation in Anhui Province from 2004 to 2014, so as to provide the evidence for formulating“The thirteenth five year”schistosomiasis control plan. Methods The information for schistosomiasis control and the data of the endemic surveillance of schistosomiasis were collected and analyzed for the chang?es of schistosomiasis endemic situation in Anhui Province from 2004 to 2014. Results The Oncomelania hupensis snail areas presented on a rising trend,and reached to the largest area with about 3.1 billon m2 in 2011. However,the snail areas decreased from 2012,and reduced by 10.55%in 2012 compared with the areas in 2011,and reduced to the lowest level in 2014 in recent 10 years. The density of living snails presented a fluctuation situation from 2004 to 2008,and on a decreasing trend from 2008, and the density of living snails was below 1 snail/0.1 m2 after 2011. The infection rate of snails remained stagnant state from 2004 to 2011,and decreased rapidly in 2012,and no schistosome infected snails were found in 2013 and 2014. The schistosome in?fection rate of residents decreased gradually,and the number of acute schistosomiasis was under 50 cases with scattered distribu?tion after 2006,and no acute cases occurred in 2013 and 2014. The infection rate of livestock was above 1%from 2004 to 2011, and reduced to 0.55%in 2012,and it was the first time that the infection rate of livestock was lower than that of residents in the same year in 2014. The progress for achieving the goal of schistosomiasis transmission control accelerated after 2011,and the number of counties that reached the standard of schistosomiasis transmission controlled from 2012 to 2014 was 4,9 and 14 and the number of townships was 33,76 and 32,respectively. Conclusion Schistosomiasis control has achieved remarkable effec?tiveness in Anhui Province,but there still exists hard work to consolidate the achievement and reach schistosomiasis transmis?sion interrupted.
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Oncomelania hupensis which plays an important role in the transmission of schistosomiasis japonica is the only intermediate host of Schistosoma japonicum and carrying out studies on its subspecies differentiation and genetic variation will have an important significance for schistosomiasis control. In this paper the research progress of taxonomy and discrimination techniques of O. hupensis is reviewed at four levels namely the morphological level the cellular level the protein level and the DNA molecule level and DNA sequencing technology is considered as the ideal taxonomy and discrimination technique of O. hupensis and the future research emphasis.
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<p><b>OBJECTIVE</b>To analyze the impact of water transfer project from the Yangtze River to the Huaihe River on schistosomiasis transmission, and to evaluate the risk of the disease input to the potential endemic area in Anhui Province, namely the Chaohu Lake region.</p><p><b>METHODS</b>From 2008 to 2012, 1 fixed and 3 mobile surveillance sites in the Chaohu Lake area were selected, and the schistosomiasis infection situation of 615 local residents in the fix surveillance site was investigated in autumn of 2008 and 2012, while the schistosomiasis infection situation of 1603 mobile population in the 3 mobile surveillance sites were investigated in autumn of 2008 to 2012. All people were screened by indirect hemagglutination assay (IHA), and the positive ones were then examined by sedimentation method. 303 local livestock and livestock from schistosomiasis endemic areas were examined by stool hatching method in autumn of 2008 to 2012. From 2008 to 2012, the distribution of Oncomelania snails was investigated in risk areas and suspicious areas, and the snail spreading pattern was conducted through salvaging floaters in rivers connected with the Yangtze River. In addition, the Oncomelania snails were raised in the cages on the beaches of the Chaohu Lake, a control area, from 2007 to 2010, and their survival and reproduction capacity was observed.</p><p><b>RESULTS</b>In 2008 and 2012, 301 and 314 local residents were detected by IHA, but there were no positive found. From 2008 to 2012, a total of 1603 mobile population were examined by IHA, and the positive rate of antibody was 3.1% (49/1603); 75 individuals were examined by sedimentation method, and the positive rate was 36.00% (27/75). A total of 303 livestock were examined by stool hatching method, but no one showed positive. A total of 1630 km(2) in risk areas and 3551 km(2) in suspicious areas were surveyed, but there were no Oncomelania snails found. A total of 457.6 kg floating debris were investigated, and 11 Oncomelania snails were found. From 2007 to 2010, the survival rate of Oncomelania snails in two trail areas in the Chaohu Lake and in the control area was 88% (86/98), 51% (45/89), 30% (25/71), 24% (20/84) and 92% (85/92), 54% (50/92), 23% (12/52), 17% (13/79) and 96% (85/89), 52% (44/85), 26% (18/69), 18% (14/76), respectively, there were no statistical significance between the trial areas and the control area (χ1(2) = 3.78, P > 0.01; χ2(2) = 0.27, P > 0.01; χ3(2) = 2.51, P > 0.01; χ4(2) = 1.50, P > 0.01), and filial generation snails were found in each observation area from 2008 to 2010, the number was 156-312.</p><p><b>CONCLUSION</b>The imported infectious sources of schistosomiasis have been found in the Chaohu Lake region, the possibility of imported exogenous Oncomelania snails spreading into the Lake and surviving and reproducing there is high. The risk of schistosomiasis input to the potential endemic area in Anhui Province is predicted to be high.</p>
Subject(s)
Animals , Humans , Cross-Sectional Studies , Environmental Monitoring , Lakes , Parasitology , Risk Assessment , Rivers , Parasitology , Schistosomiasis japonica , Epidemiology , Snails , ParasitologyABSTRACT
Objective To understand the variation rules of schistosomiasis endemic situation before and after schistosomia-sis transmission controlled or interrupted,so as to provide the evidence for the consolidation of control achievements. Meth-ods In Anhui Province,3 counties reaching the criteria of schistosomiasis transmission controlled or interrupted were selected and their historical endemic data were collected and analyzed statistically from 10 years before the schistosomiasis transmission controlled to 2008. Results In Tianchang City,the Oncomelania hupensis snail area was 3.54 hm2 in a part of the lake marsh-land in the year reaching the criteria of transmission controlled(1998),and no snails were found in the year of transmission in-terrupted(2008). No stool-test-positive resident was detected except there were 58 acute schistosomiasis cases in 1993,and the sero-test-positive rate of local residents remained at low levels(0-1.55%). In Taihu County,the snail area was 0.84 hm2 account-ing for 0.06%of its historical accumulative snail areas in the year of transmission controlled(1971),and no snails were found three years before the transmission interrupted (1983). However,the schistosomiasis endemic rebounded 12 years later (1995),there was an outbreak of acute schistosome infections(73 cases),and the snail area increased again to 133.7 hm2 ac-counting for 2.91%of historical accumulative snail areas. After that,the snail area kept on rising and the infection rates of resi-dents and bovine remained higher than 1%. In Guangde County,the snail area was 32.4 hm2 accounting for 1.90%of its histori-cal accumulative snail areas in the year of transmission controlled(1995). After that,the snail area increased progressively, and the schistosomiasis endemic rebounded and there were acute schistosome infections 5 years later. The Spearman tests showed that the sero-test-positive rate(Tianchang City)and the stool-test-positive rates of residents and bovine(Taihu County)had positive correlations with the snail areas(r=0.582,0.401,0.596,all P<0.05). Conclusion The snail status is a key for the consolidation of schistosomiasis transmission controlled and interrupted. Therefore,a valid surveillance system of snail situa-tion should be established as quickly as possible.
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In this study,we summarized the results from the retrospective investigation on endemic situation of schistosomia-sis that was implemented in nine provinces(autonomous region),China in 2009,demonstrated the role of these retrospective in-vestigations in accelerating the progress of schistosomiasis control in China,and clarified the great significance of the investiga-tion for summarizing the experiences for the control of schistosomiasis,and analyzing the changing patterns and affecting factors of endemic status of schistosomiasis in China. In addition,these retrospective investigations provide reliable evidence for revis-ing the Criteria of Schistosomiasis Control and Elimination,and for the more accurate and scientific assessment of the effec-tiveness of schistosomiasis control in China.
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Objective To investigate the effects of spleen preservation on hepatic fibrosis and relevant cytokine in rabbits with advanced schistosomiasis. Methods After hepatic cirrhosis was induced by infecting Schistosoma japonicum cercariae in rabbits, total splenectomy (TSG), subtotal splenectomy (SSG) or sham operation (model control group, MCG) were performed respectively on these rabbits. Meanwhile,a normal control group (NCG) was established. The serum levels of tumor necrosis factor alpha (TNF-α) , interleukin-6 (IL-6) and interleukin-1 beta (IL-lβ) were detected respectively by radioimmunoassay(RIA) at the 8th, 15th and 21st week post-infection. The expressions of transforming growth factor betal (TGF-β1), type Ⅰ and type Ⅲ collagen in liver tissues were determined by immunohistochemistry before and after the operations. Results Compared with NCG, the serum levels of TNF-α, IL-6 and IL-1β of MCG rabbits increased significantly at the 8th week post-infection (P 0.05). The expressions of TGF-β1, type Ⅰ and type Ⅲ collagen in liver tissue of MCG rabbits were significantly higher than those of NCG rabbits before the operation (P 0.05). Conclusion The residual splenic tissue after subtotal splenectomy does not aggravate the hepatic fibrosis at advanced schistosomiasis. The mechanism may be that the relevant cytokines of hepatic fibrosis (TGF-β1, TNF-a, IL-6, IL-1β) decreased to a lower level at this time,and splenectomy does not influence the levels of them.
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According to the requirement of the national assessment for achieving the infection control criteria, 42 villages (among them,25 villages belonged to the first stratum, and 17 villages belonged to the second stratum) in 14 counties from 5 provinces, including Hunnan, Hubei, Jiangxi, Anhui and Yunnan, were selected as sampling villages for the assessment.The results from the field assessment showed that 154 out of 9 067 people were found infected with Sckistosoma japonicum, with an average infection rate of 1.7% ranged from 0.31 % to 4.10% , and only Yongping Village from Weishan County and Tenglong Village from Eryuan County were not found any case. A total of 46 out of 3 323 head of cattle were infected with S. japonicum, with an average infection rate of 1.38% ranged from 0.26% to 3.79% , and no any infected individual detected in Nanling County. No outbreak occurred in those sampling villages. Therefore, it is indicated that the five sampling provinces have reached the national criteria on infection control of schistosomiasis.
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<p><b>OBJECTIVES</b>To perform GIS spatial analysis on malaria transmission patterns in Jiangsu after setting up a malaria database and developing GIS model of malaria transmission in Jiangsu province.</p><p><b>METHODS</b>The epidemiological GIS database of malaria in Jiangsu province was established using ArcView 3.0a software. The climate data covering Jiangsu province and its peripheral area were extracted from the FAOCLIM database, the total growing degree days (TGDD) for Plasmodium vivax were calculated, and spatial distribution for TGDD was analyzed by ArcVeiw 3.0a.</p><p><b>RESULTS</b>The predicted malaria distribution map based on TGDD was created, which showed that the transmission of malaria decreased gradually from west to east, which can be divided into three belts according to the degree of transmission. The 14-year mean morbidity distribution map of malaria in Jiangsu showed that the middle and west parts of Jiangsu is the most serious endemic area. The morbidity in the areas along the Taihu valley, such as Suzhou, Wuxi and Changzhou, as well as Nantong and a few of northern counties are the lowest. The morbidity of other places is at the middle level. The 14-year mean morbidity distribution map of malaria is correlated with predicted malaria distribution map for TGDD.</p><p><b>CONCLUSION</b>It is possible to monitor the malaria transmission by GIS predicted model based on TGDD.</p>
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Humans , China , Epidemiology , Databases, Bibliographic , Geographic Information Systems , Malaria , Epidemiology , Models, BiologicalABSTRACT
Objective To evaluate the effect on schistosomiasis control by implementing the synthetic measures with emphasis on infection source control.Methods Ten higher endemic villages in 10 counties were chosen to implement the measures of " replacing cattle with machines", "rearing domestic animals in pens", "safely treating night-soil or building methane-generating pits".In these villages, all cattle should be eliminated, other livestock be reared in pens, and all households be supplied with sanitary lavatories that could safely treat night-soil, or with methane-generating pits, and safe water. Results After 1 year of implementing the project, the number of cattle, sheep, pigs and dogs in 10 villages reduced by 92.7%,70.8%,14.3% and 20.2%, respectively, 76.0% of households had sanitary lavatories or methane-generating pits, 75.9% of households had safe water supply, all the remaining pigs were reared in pens, and the schistosome infection rate of residents reduced by 75.8%, the infection rate of cattle reduced by 79.8%, the density of infected snails reduced by 75.0% and the infection rate of snails reduced by 60.0%, respectively. Conclusion The synthetic measures with emphasis on infection source control are effective in schistosomiasis control.
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Objective To understand the current distribution of infected snails in Anhui Province.Methods The data of snail survey were collected,the database was set up and the position of environments of infected snails were determined with GPS,the E-map was established with ArcGis 9.1 and the distribution of infected snail was analyzed.Results In 2007,331 environments with infected snails were found in Anhui Province,and 62.5% of them were found in the lake regions and 37.5% in the mountainous areas.The infected snail habitat areas were 682.6 hm2,85.5% of them were distributed in the lake regions and 14.5% in the mountainous areas.The river beach and the canal were the main environments with infected snails in the lake regions and mountainous areas,respectively;and 97.2% of the environments with infected snail were distributed in the infection-uncontrolled villages or villages which reached the criteria of infection control of schistosomiasis.Grassland was the main vegetation with infected snails,and the second was the reeds and trees.Conclusions The current endemic situation of the infection-uncontrolled villages or villages which reached the criteria of infection control of schistosomiasis is severe and should be emphasized for schistosomiasis prevention and control.The distribution of infected snail is connected with the river system.In the lake regions,the infected snails are distributed over the bottomlands of the Yangtze River and tributaries and islets and lakes;in the mountainous areas,the infected snails are distributed in the rivers banks and irrigated areas or special environments.
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Objective To explore the factors that influence the medical cost of advanced schistosomiasis patients in Anhui Province.Methods The medical records and other related data were collected from 13 pilot hospitals in Anhui Province.Single factor analysis and multiple regression methods on 264 cases of medical cost were used for the analysis.Results The results of single factor analysis showed that the history of ascites,ascites and concomitant diseases for advanced schistosomiasis medical cost had significant differences(P
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Objective To establish the management information system of acute schistosomiasis in order to make the information management more efficient in Anhui Province.Methods The information of acute schistosomiasis cases in Anhui Province from 2001 to 2006 was collected,and Visual Foxpro 6.0 was used to develop the management information system for acute schistosomiasis in Anhui Province.Results The endemic status and distribution of acute schistosomiasis were able to be more rapidly analyzed.The system,with a friendly interface,was operated easily.The endemic situation of acute schistosomiasis was reflected in precise and timely.Conclusion The management information system of acute schistosomiasis could offer the scientific evidence for acute schistosomiasis control in Anhui Province.
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0.05),but the former was statistically higher than the latter from 2003-2005. Conclusions There is no obvious variation of the schistosome epidemicity at Jiangxin after resettlement but remaining arable land, while the epidemicity of Jiangzhou, after resettlement and converting cultivated land to forest or grassland, declines in some degree.