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Objective@#To compare the effectiveness before and after the adjustment of schistosomiasis control strategies in Nanjing City, so as to provide the evidence for improving schistosomiasis control interventions.@*Methods@#The prevalence of Schistosomasis japonicum infections in humans, livestock, Oncomelania hupensis and sentinel mice was collected in Nanjing City from 1993 to 2018, and the prevalence of S. japonicum infections in humans, livestock, sentinel mice and O. hupensis, and the areas of snail habitats, areas of infected snail habitats and snail control areas were compared before (1993-2004) and after (2005-2018) the adjustment of schistosomiasis control strategies to evaluate the effectiveness.@*Results@#The prevalence of S. japonicum infections in humans, livestock, O. hupensis and sentinel mice was 0.77% and 0.02% (χ2=6 430.634, P<0.001), 0.46% and 0.01% (χ2=344.401, P<0.001), 0.19% and 0.11% (χ2=239.685, P<0.001), and 34.35% and 1.56% (χ2=1 856.286, P<0.001) in Nanjing City before and after the adjustment of schistosomiasis control strategies, respectively. The median areas (interquartile range) of snail habitats, infected snail habitats and snail control were 4 175.37 (1 301.65) and 2 366.44 (885.27) hm2 (Z=-3.755, P<0.001), 870.49 (1 001.75) and 0 (158.89) hm2 (Z=-3.654, P<0.001) and 1 383.23 (793.57) and 5 031.94 (629.11) hm2 (Z=-4.320, P<0.001) in Nanjing City before and after the adjustment of schistosomiasis control strategies, respectively.@*Conclusions@#After the adjustment of schistosomiasis control strategies, remarkable effects on schistosomiasis control has achieved in Nanjing City, where the transmission of schistosomiasis was interrupted. Nevertheless, the strategy requires to be continued and improved to move towards elimination of schistosomiasis in Nanjing City.
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Objective To analyze the epidemiological characteristics and diagnosis of imported malaria before and after malaria elimination in Nanjing City of Jiangsu Province, so as to provide the scientific evidence for formulating the malaria control strategy after malaria elimination. Methods Data pertaining to the epidemic situation and individual investigation of malaria in Nanjing City before (from 2012 to 2016) and after malaria elimination (from 2017 to 2020) were captured from the National Notifiable Communicable Disease Reporting System and the Information System for Parasitic Diseases Control and Prevention and were analyzed statistically. Results A total of 178 malaria cases were reported in Nanjing City from 2012 to 2020, and all were imported cases. There were 99 malaria cases reported before malaria elimination in Nanjing City, including 78 cases with Plasmodium falciparum malaria (78.79%), 5 cases with P. vivax malaria (5.05%), 10 cases with P. ovale malaria (10.10%), 3 cases with P. malariae malaria (3.03%) and 3 cases with mixed infections (3.03%), and 79 malaria cases reported after elimination, including 63 cases with P. falciparum malaria (79.75%), 5 cases with P. vivax malaria (6.33%), 9 cases with P. ovale malaria (11.39%), 2 cases with P. malariae malaria (2.53%). There was no significant difference in the proportion of each type of malaria cases in Nanjing City before and after malaria elimination (χ2 =2.400, P > 0.05). Malaria cases mainly acquired Plasmodium infections in African regions, and no significant difference was seen in the proportion of malaria cases returning to Nanjing City from African countries before and after malaria elimination (χ2 = 0.093, P > 0.05). The number of malaria cases peaked in Nanjing City in January and during the period from May to July before elimination, and there was no apparent seasonal variation in the distribution of malaria cases after elimination. The proportion of malaria cases living in Nanjing City was significantly greater after malaria elimination than before elimination (72.15% vs. 55.56%; χ2 = 5.187, P = 0.023). The proportions of businessmen and international students were both 5.05% before malaria elimination, and increased to 15.19% and 13.92% after elimination, respectively (χ2 = 5.229 and 4.229, both P values < 0.05). The percentage of definitive diagnosis of malaria at initial diagnosis was 18.75% in county-level hospitals before malaria elimination and increased to 61.11% after elimination (χ2 = 6.275, P = 0.012), while the proportion of malaria cases with definitive diagnoses in county-level hospitals was 4.04% before malaria elimination and increased to 13.92% after elimination (χ2 = 5.562, P = 0.018). During the period from 2012 to 2020, the proportion of malaria cases with definitive diagnoses within 1 to 3 days post-admission increased from 27.27% in Nanjing City before malaria elimination to 45.57% after elimination (χ2 = 6.433, P = 0.011). Conclusions The epidemic situation of imported malaria remains serious in Nanjing City during the post-elimination stage, and malaria parasite infections predominantly occur in African regions. In addition, there are changes in regional and occupational distributions of malaria cases and the diagnostic capability of malaria increases in county-level hospitals in Nanjing City after malaria elimination. Further improvements in the malaria surveillance system and the diagnostic and treatment capability of malaria in medical institutions at each level are required to consolidate malaria elimination achievements in Nanjing City.
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ObjectiveTo evaluate the effectiveness of Oncomelania snails control following the implementation of integrated schistosomiasis control measures in river channels connecting the Yangtze River in endemic areas of Nanjing City. MethodsThe river channels connecting the Yangtze River with snails in Nanjing City were selected as the study pilots. The integrated schistosomiasis control measures implemented in the study pilots were investigated by means of retrospective analyses and field surveys from 1998 to 2019, and the effectiveness of snail control was evaluated. Results Integrated control measures with emphases on environmental improvements including water resource projects for schistosomiasis control were implemented in the study pilots during the period from 1998 to 2019, including river bank concretion with 84.51 km in length, marshland cutting and dredging with 50.41 km in length, building 2 sluices and 3 overflow dams, digging one floodway and snail control with chemical treatment that covered an area of 3 370.80 hm2. No Schistosoma japonicum infection had been detected in snails since the completion of the integrated control measures. In addition, snails had been eliminated in 6 river channels connecting the Yangtze River until 2019, with the snail habitats reducing from 214.33 hm2 to 52.22 hm2 in 10 river channels connecting the Yangtze River and the snail density reducing to below 0.1 snails/0.1 m2 in snail-breeding river channels connecting the Yangtze River. Conclusions The integrated schistosomiasis control measures with emphases on environmental improvements may effectively control snail breeding and spread in rivers connecting the Yangtze River in endemic areas of schistosomiasis; however, the maintenance of the project and snail surveillance and control should be intensified following the completion of the integrated schistosomiasis control measures.
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Objective To understand the prevalence of Toxoplasma gondii infection among special populations in Nanjing City, so as to provide the reference for formulating the interventions for the prevention and control of T. gondii infections in this population. Methods The HIV/AIDS patients, tumor patients, pregnant women, and people with livestock and poultry breeding or processing works were selected as the study subjects from September to November 2015. The venous blood samples were collected from each participant for detecting IgG and IgM antibodies against T. gondii by ELISA. Results The overall prevalence of T. gondii infection was 10.2% in the study subjects in Nanjing City. The T. gondii infection rates were 12.2%, 11.3%, 4.0%, and 13.0% among the HIV/AIDS patients, tumor patients, pregnant women, and people with livestock and poultry breeding or processing works, respectively, and there was no statistically significant difference among the four groups (χ2 = 5.668, P = 0.130). The prevalence of T. gondii infection was higher in men than in women (15.3% vs. 5.8%; χ2 = 10.213, P = 0.001), and there were significant differences in the prevalence of T. gondii infection in terms of gender (χ2 = 9.501, P = 0.023), education levels (χ2 = 9.850, P = 0.043) or occupations (χ2 = 8.983, P = 0.062). Conclusions The infection rate of T. gondii among the special population in Nanjing City is high. Therefore, the health education intervention should be strengthened in the follow-up work for the special population.
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Objective To understand the prevalence of Toxoplasma gondii infection among special populations in Nanjing City, so as to provide the reference for formulating the interventions for the prevention and control of T. gondii infections in this population. Methods The HIV/AIDS patients, tumor patients, pregnant women, and people with livestock and poultry breeding or processing works were selected as the study subjects from September to November 2015. The venous blood samples were collected from each participant for detecting IgG and IgM antibodies against T. gondii by ELISA. Results The overall prevalence of T. gondii infection was 10.2% in the study subjects in Nanjing City. The T. gondii infection rates were 12.2%, 11.3%, 4.0%, and 13.0% among the HIV/AIDS patients, tumor patients, pregnant women, and people with livestock and poultry breeding or processing works, respectively, and there was no statistically significant difference among the four groups (χ2 = 5.668, P = 0.130). The prevalence of T. gondii infection was higher in men than in women (15.3% vs. 5.8%; χ2 = 10.213, P = 0.001), and there were significant differences in the prevalence of T. gondii infection in terms of gender (χ2 = 9.501, P = 0.023), education levels (χ2 = 9.850, P = 0.043) or occupations (χ2 = 8.983, P = 0.062). Conclusions The infection rate of T. gondii among the special population in Nanjing City is high. Therefore, the health education intervention should be strengthened in the follow-up work for the special population.
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Objective To analyze the epidemiological situation of human intestinal nematode infections in Nanjing City from 2006 to 2015,so as to provide the reference for formulating prevention and control measures. Methods The surveillance data of human intestinal nematode infections in Nanjing City from 2006 to 2015 were collected and analyzed statistically. Results From 2006 to 2015,98804 person-times of residents were surveyed in Nanjing City,and 465 person-times of residents were de-tected with intestinal nematode infections. The highest infection rate was in 2006(1.97%),and the lowest in 2013 and 2015 (both 0.05%). Moreover,the positive rate of human intestinal nematode infections showed a significantly declining trend in total (χ2=552.19,P<0.001). Meanwhile,the numbers of Ascaris lumbricoides,hookworm and Trichuris trichura cases were 329, 98 and 25 respectively,and the infection rates were 0.33%,0.10%and 0.03%respectively. Among them,443 cases had mild infection intensity (98.66%). There were 462 cases of single-infection (99.35%),and 3 of co-infection of two parasites (0.65%). From 2006 to 2015,92539 person-times of children under 12 years old were surveyed for Enterobius vermicularis in-fection and 352 cases were detected with E. vermicularis infection. Moreover,the positive rate showed a significantly decreasing trend in total(χ2=147.94,P<0.001). Conclusions The control effect of human intestinal nematode infections in Nanjing City is remarkable. However,the surveillance and health education in key groups still should be strengthened,and the preven-tion and control programs should be adjusted promptly to further consolidating the effectiveness of intestinal nematode disease prevention and control.
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OBJECTIVE:To provide reference for formulating the policy of promoting the popularization and application of es-sential medicines in second grade or third grade medical institutions. METHODS:Drug purchase and warehousing data was collect-ed from 31 second grade or third grade medicinal institutions in Nanjing during Jan. 2012-Dec. 2015. Excel 2010 and SPSS 20.0 software were used to summarize and analyze statistically the purchase amount of allocation quantity of essential medicines. RE-SULTS:The proportion of essential medicine purchase amount in total medicine purchase amount during 2012-2015 were 18.33%, 18.56%,17.19%,17.53% in 31 medicinal institutions (calledthe ratio of essential medicine purchase amountfor short);the proportion of national essential medicine purchase amount in essential medicine purchase amount(calledthe ratio of essential medi-cine purchase amountfor short)were 31.14%,29.40%,25.69%,25.79%,respectively. The number of generic names for allocat-ed essential medicines were 189.84,205.58,210.26,206.65,respectively. The ratio of essential medicine purchase amount and the ratio of essential medicine purchase amount in 2014 were decreased significantly,compared to in 2013(P<0.05). The number of generic names for allocated essential medicines in 2013 was increased significantly,compared to in 2012 (P<0.05). The ratio of essential medicine purchase amount in second grade medical institutions was significantly higher than third grade medical institu-tions,the ratio of essential medicine purchase amount in general hospital was significantly higher than special hospital;the number of generic names for allocated essential medicines was significantly higher than TCM hospital and special hospital;the ratio of es-sential medicine purchase amount in second grade medical institutions with community health service center in subjection to them was significantly higher than those without community health service center in subjection to them;there was statistical significance (P<0.05). There was negative correlation between the ratio of essential medicine purchase and total purchase amount of medicine in general hospitals(P<0.05). There was positive correlation between the number of generic name of allocated essential medicines and the number of generic name of all medicines in 31 medical institutions(P<0.05). CONCLUSIONS:The ratio of essential med-icine purchase amount and national essential medicine purchase amount,the numbers of generic names of essential medicines were very different and low in these hospitals during 2012-2015. Just one or two had met the requirements of the Jiangsu provincial health and family planning commission. The grade,type,medicine purchase and allocation scale,administering community health service center all influence the purchase and allocation of essential medicines.
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Objective To understand the dynamic endemic situation of schistosomiasis in Nanjing City,2015,so as to pro-vide evidences for policy-making of schistosomiasis control. Methods According to The National Scheme of Schistosomiasis Surveillance(2014),the endemic situation of schistosomiasis was monitored in 11 national surveillance sites in Nanjing. Re-sults The positive rates of serological(IHA)and stool examinations were 2.97%(97/3269)and 0 for local residents,and 0.52%(12/2298)and 0 for migrant people,respectively. No schistosome-infected livestock was found. Totally 147.2953 hm2 area with Oncomelania hupensis snails were found,but no schistosome-infected snails were discovered. Conclusions The en-demic situation of schistosomiasis declines greatly in Nanjing City in 2015. However,the control work still should be strength-ened to consolidate the achievements of schistosomiasis control.
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Objective To investigate the status of Cryptosporidium infection in the population in Nanjing City so as to pro-vide the evidence for the prevention and control of cryptosporidiosis. Methods A total of 100 fecal samples were collected from each of three districts(Liuhe,Qixia and Gaochun)and one hospital(Nanjing Zhongda Hospital)in 2015 and 2016 respective-ly. The fecal samples were detected for Cryptosporidium with microscopy(by using the gold amine phenol-modified acid-fast staining)and the positive samples were detected again for the molecular biology confirming by using the fluorescence quantita-tive PCR. Results During the two years,581 cases of normal population who lived in the city were surveyed and no Cryptospo-ridium infection was found. Among 202 cases of outpatients with chronic diarrhea,there were 9 Cryptosporidium positive cases with the microscope scanning method (4.46％),and among the 9 cases,7 cases showed obvious logarithmic amplification curves showing positive Cryptosporidium nucleic acid,but 2 cases without the obvious logarithmic amplification curves,and the Cryptosporidium nucleic acid positive rate was 3.47％. Conclusions Cryptosporidium infection is not found in the normal popu-lation of Nanjing City,but the Cryptosporidium infection is found in the chronic diarrhea patients. The results imply that we should strengthen the detection of Cryptosporidium in the chronic diarrhea patients,so as to provide the evidence for improving the diagnosis and treatment of cryptosporidiosis.
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Objective To analyze the epidemiological characteristics of malaria in Nanjing City,so as to provide the evi?dence for further formulating and adjusting the malaria prevention and control strategy. Methods The data of malaria situation, malaria cases and epidemiological investigations were collected from the Internet Reporting System in Nanjing City from 2010 to 2015 and analyzed statistically. Results A total of 137 confirmed malaria cases were reported in Nanjing City from 2010 to 2015,including 102 falciparum malaria cases(74.45%),33 vivax malaria cases(24.09%),one ovale malaria case(0.73%) and one quartan malaria case(0.73%). Among the 137 malaria cases,126 cases(91.97%)were imported from foreign coun?tries,2 cases(1.46%)were infected locally,and nine cases(6.57%)were imported from other provinces in China. Among the 126 overseas imported cases,117 cases were imported from African countries and 9 from Asian countries. These malaria cases were majorly young men working as migrant workers,laborers and technical persons. About 19.30%of the cases went to hospital on onset day,and 55.65%were confirmed by medical institutions as malaria in the same day. The majority of diagnosis institu?tions were municipal hospitals(74.45%). Conclusions The number of malaria cases in Nanjing City is declining year by year. The local infections are eliminating gradually. However,the situation of imported malaria from overseas is still serious. There?fore,the surveillance work and health education still should be strengthened,so as to reduce the risk of imported malaria.
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OBJECTIVE: To analyze the application and tendency of the drugs for antiacid and peptic ulcer diseases in Nanjing area.METHODS: In ranking of amount of money of drugs and DDDs,the drugs for antiacid and peptic ulcer diseases in 22 hospitals of Nanjing area during 2003～ 2005 statistically analyzed.RESULTS: During this period,the amount of money of these drugs had progressively increased by 30.8% per year;The DDDs of omeprazole increased remarkedly by 36.8% per year.CONCLUSION: With the morbility of peptic ulcer increasing,the drugs of PPI for peptic ulcer become the first choice in clinical application,the constituent ratio of amount of money of the drugs increased every year.