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@#Abstract: Objective To analyze the impact of the flood disaster on the distribution of Oncomelania snails in 2020 in Wuhu City, to provide scientific basis for formulating the "14th Five-Year Plan" for schistosomiasis control and precise prevention and control measures in Wuhu City. Methods Systematic sampling combined with environmental spot check was used to investigate the distribution of snails in the historical snail's environment, existing snail's environment and suspected snail's environment in Wuhu City. The collected snails were crushed and examined by microscope to understand the death and life of snails and the infection of Schistosoma japonicum, and the density of live snails and other indicators were counted. Results The historical area of snails was 14 475.24 hm2 in Wuhu City, and the existing area of snails was 4 588.72 hm2, including 4 210.32 hm2 for lake type and 378.40 hm2 for hill type snails. The average occurrence rate of live snails was 14.59%, and the average density of live snails was 0.50 snails/0.1 m2 in Wuhu City. There were 2 745 snail breeding environments, of which 491 were lake type and 2 254 are hill type, accounting for 17.89% and 82.11% respectively. The existing snail area was mainly distributed in the beaches and ditches, accounting for 92.51% and 6.29% of the existing snail area respectively. Some snails were distributed in ponds, paddy fields and other environments. Among all the historical snail habitats, the majority were class Ⅱ and class Ⅲ environments (which still have the basic conditions for snail breeding at present), with a total of 1 739 sites (blocks), accounting for 63.35% of the total environment. No schistosomiasis infected snails have been found, and the newly discovered and recovered snails cover an area of 268.21 hm2 in Wuhu City. Conclusions The distribution of snails is extensive in Wuhu City, and snails are mostly distributed in beaches, which are vulnerable to the impact of flood disasters. The spread of Oncomelania snails is found in 30 marshlands in 3 counties in this survey. It is necessary to continue to strengthen snail monitoring after disasters, and take class Ⅱ and class Ⅲ environments as key areas for snail monitoring, so as to find, identify and evaluate the risk of schistosomiasis transmission as soon as possible, to avoid or reduce the impact of flood disasters on the process of schistosomiasis control, and promote the process of schistosomiasis elimination.
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Objective To investigate the morphological characteristics of Echinostoma miyagawai in domestic ducks in Wuhu area, and to explore the feasibility of the cytochrome oxidase subunit-1 (Cox1) gene as a molecular marker for the identification of E. miyagawai. Methods E. miyagawai was isolated from free-ranged domestic ducks in Wuhu area, and the parasites were stained and identified. In addition, the mitochondrial Cox1 gene of E. miyagawai was amplified using a PCR assay, and the amplification product was sequenced and aligned with the GenBank database to yield the homology for the identification of parasite species in combination with morphological findings. Intra-species comparison was done based on the Cox1 gene sequence. Results The prevalence of E. miyagawai infection was 16.67% in domestic ducks in Wuhu area, and the adult E. miyagawai was 6.6 to 13.2 mm in length. The size of the E. miyagawai Cox1 gene was approximately 660 bp, which had a 99.68% homology to the E. miyagawai accessed in GenBank. The morphological findings were in agreement with molecular identification. Conclusion E. miyagawai infection is common in domestic ducks in Wuhu area, and the mitochondrial Cox1 gene is a feasible marker of intra- and inter-species molecular identification of Echinostoma.
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Objective To investigate the prevalence and vertical transmission rate of Toxoplasma gondii infections among in parturient women in Wuhu City, so as to provide reference for the prevention and control of toxoplasmosis among pregnant women in the city. Methods Parturient women’s venous blood samples and neonatal heel blood samples were collected in Wuhu City and prepared into filter-paper blood samples. The prevalence and vertical transmission rate of T. gondii infections were detected using the loop -mediated isothermal amplification (LAMP) assay among the parturient women. Results There were three positive samples detected in the 475 filter-paper blood samples from the parturient women, with a mean positive rate of 0.63%. The prevalence of T. gondii infection was 0 in pregnant women at ages of < 20 years (0/5) and at an advanced maternal age (0/24), while the prevalence was 0.67% (3/446) in pregnant women at an appropriate maternal age. T. gondii infection was detected in 2 filter-paper blood samples from newborns, with a vertical transmission rate of 66.67%. Conclusions There is T. gondii infection in the parturient women and a high vertical transmission rate of T. gondii infection is detected in Wuhu City. The awareness of the potential risk factors of toxoplasmosis should be improved among pregnant women to prevent the damages of toxoplasmosis to humans.
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Objective To analyze the endemic situation of schistosomiasis in Wuhu City from 2009 to 2018, so as to provide evidence for adjusting and developing the control strategy. Methods The data regarding the endemic situation were retrospectively collected and analyzed in Wuhu City from 2009 to 2018. Results The prevalence of human Schistosoma japonicum infections reduced from 0.450% in 2009 to 0.035% in 2018 in Wuhu City, and a reduction rate of 92.22% (χ2 = 1 6128.307, P < 0.01), and the prevalence of S. japonicum infections decreased from 0.483% in 2009 to 0 in 2018 (χ2 = 27.570, P < 0.01) in livestock. The area of snail habitats increased from 1 501.07 hm2 in 2009 to 4 408.62 hm2 in 2018, with an increase of 193.70%. No infected snails were found in Wuhu City since 2012, and no egg positives were detected in humans and livestock since 2016. Conclusions Currently, the endemic situation of schistosomiasis is at a low level in Wuhu City; however, there are still factors affecting schistosomiasis transmission. In the future, the integrated strategy with emphasis on the control of infectious source and the surveillance-response system should be intensified to consolidate the achievements of schistosomiasis control.
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Objective To investigate the prevalence and vertical transmission rate of Toxoplasma gondii infections among in parturient women in Wuhu City, so as to provide reference for the prevention and control of toxoplasmosis among pregnant women in the city. Methods Parturient women’s venous blood samples and neonatal heel blood samples were collected in Wuhu City and prepared into filter-paper blood samples. The prevalence and vertical transmission rate of T. gondii infections were detected using the loop -mediated isothermal amplification (LAMP) assay among the parturient women. Results There were three positive samples detected in the 475 filter-paper blood samples from the parturient women, with a mean positive rate of 0.63%. The prevalence of T. gondii infection was 0 in pregnant women at ages of < 20 years (0/5) and at an advanced maternal age (0/24), while the prevalence was 0.67% (3/446) in pregnant women at an appropriate maternal age. T. gondii infection was detected in 2 filter-paper blood samples from newborns, with a vertical transmission rate of 66.67%. Conclusions There is T. gondii infection in the parturient women and a high vertical transmission rate of T. gondii infection is detected in Wuhu City. The awareness of the potential risk factors of toxoplasmosis should be improved among pregnant women to prevent the damages of toxoplasmosis to humans.
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Objective To analyze the endemic situation of schistosomiasis in Wuhu City from 2009 to 2018, so as to provide evidence for adjusting and developing the control strategy. Methods The data regarding the endemic situation were retrospectively collected and analyzed in Wuhu City from 2009 to 2018. Results The prevalence of human Schistosoma japonicum infections reduced from 0.450% in 2009 to 0.035% in 2018 in Wuhu City, and a reduction rate of 92.22% (χ2 = 1 6128.307, P < 0.01), and the prevalence of S. japonicum infections decreased from 0.483% in 2009 to 0 in 2018 (χ2 = 27.570, P < 0.01) in livestock. The area of snail habitats increased from 1 501.07 hm2 in 2009 to 4 408.62 hm2 in 2018, with an increase of 193.70%. No infected snails were found in Wuhu City since 2012, and no egg positives were detected in humans and livestock since 2016. Conclusions Currently, the endemic situation of schistosomiasis is at a low level in Wuhu City; however, there are still factors affecting schistosomiasis transmission. In the future, the integrated strategy with emphasis on the control of infectious source and the surveillance-response system should be intensified to consolidate the achievements of schistosomiasis control.
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Objective To understand the status of knowledge,attitude and practice(KAP)on foodborne parasitic diseases and the influencing factors among college students in Wuhu City,so as to provide the evidence for the development of strategies on health education.Methods A total of 1 685 college students from five colleges were selected through the randomly stratified cluster sampling method,and then they were investigated by questionnaires to understand their KAP on foodborne parasitic dis-eases.Chi-square test was performed and regression models were constructed to analyze the influencing factors of knowledge on food-borne parasitic diseases.Results Among the 1 685 college students surveyed the awareness rates of knowledge about food-borne parasitic diseases and their harms were 33.5％(565 cases)and 31.4％(529 cases).There were statistically significant dif-ferences among/between the grades,schools,places of origin,family incomes,whether or not having the male or female friends,whether or not having the medical personnel in the family,whether or not having the insistence on the annual physical examination,whether or not receiving the health education,and whether or not having the history of parasitic diseases(all P<0.05).The logistic regression analysis showed that the school,receiving the health education,having the insistence on the annu-al physical examination,and the history of parasitic diseases were the independent influencing factors of the awareness rate of knowledge on foodborne parasitic diseases(all P<0.01).Conclusion The awareness rate,healthy behavior and correct atti-tude formation about foodborne parasitic diseases are low among the college students in Wuhu City,and therefore,it is neces-sary to offer the courses related to foodborne parasitic diseases in colleges and universities.
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Objective To investigate the Demodex infection status and influencing factors in medical students in Wuhu City. Methods The mite specimens were collected by the cellophane tape method,and the influencing factors were investigated through the questionnaires. Results A total of 316 medical students were surveyed,117 students were infected with Demodex mite,and the total infection rate was 37.03%. There was no significant difference between the male and female in the infection rate( χ2 = 0.00,P > 0.05). Of the 117 infected cases,the infection rate of simple Demodex folliculorum was 51.28%,the infec-tion rate of simple Demodex brevis was 24.79%,and the rate of mixed infections was 23.93%. The rate of the mild infection (83.76%)was significantly higher than that of the moderate infection(12.82 %)and that of the severe infection(3.42%). The infection rate in the forehead was the highest(29.41%). Among the students with the oily skin,the infection rate of Demodex mite was related to sex. The infection rate of simple Demodex brevis in the male(3.70%)was lower than that in the female (16.42%)( χ2 = 6.92,P < 0.05),while the rate of the mixed infections in the male(17.28%)was higher than that in the fe-male(4.48%)( χ2 = 5.91,P < 0.05). The infection rate of facial skin with symptoms(51.80%)was higher than that of normal facial skin(33.05%)( χ2 = 9.14,P < 0.01). There was no significant difference between the infection rate of Demodex mite and the living habits and other factors. Conclusions There is some infection of Demodex in the medical students. The infection rate of facial skin with symptoms is higher than that of the normal facial skin. So we should strengthen the prevention and treat-ment of Demodex infection in medical students.
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Objective To investigate the species of Limacodidae and the biological habits on Prunus cerasifera and sycamore in the urban area of Wuhu City,so as to provide the reference for the prevention and control of the diseases caused by Limacodi?dae. Methods Two observation places were selected in the urban area of Wuhu City,and the survey period of the first observa?tion place(A)was from 2014?5?4 to 2014?11?2,and eucleid caterpillar was observed and collected every Sunday(a total of 27 times);the survey period of the second observation place(B)was from 2014?1?5 to 2014?12?28,and eucleid caterpillar was ob?served and collected every Sunday(a total of 52 times). The eucleid caterpillars were collected by the visual inspection and arti?ficial direct collecting method,and then they were identified and classified by the naked eye direct observation and the direct ob?servation with the help of the anatomical lens in the laboratory. Results There were seven kinds of identified Limacodidae from the two observation places and their occurrence regularity,the species composition ratio,and natural enemies were understood. Conclusions Limacodidae larvae not only are the defoliator of the ornamental forests,but also harm the health of residents, that is they can cause eucleid larva dermatitis. Therefore,we should strengthen the prevention and control of Limacodidae,re?ducing its impact on the lives of the residents.
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Objective To investigate the epidemic situation of Metorchis orientalis in Wuhu City Anhui Province. Meth?ods Three lakes Fengming Longwo and Kui lakes were selected in Wuhu City and the poultries around the lakes and fresh?water fishes in the lakes were captured to test the infection of M. orientalis and the infection rates were calculated. Results The adult worms of M. orientalis were found in gall bladder and hepatic duct of domestic ducks with infection rate of 16.7%. The metacercariae of M. orientalis were discovered in the muscle of Pseudorasbora parva and Pseudogobio rivularis with infection rates of 7.13%and 3.38%respectively. Conclusion M. orientalis is endemic in Wuhu City which should be paid enough at?tention to the animal husbandry aquaculture and medicine.