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Objective:To analyze the epidemic status and spatial and temporal cluster distribution of visceral leishmaniasis (VL) in Gansu Province, and to provide evidence for making precise prevention and control measures and epidemic surveillance.Methods:The data of VL cases in Gansu Province reported in the China Disease Prevention and Control Information System Infectious Disease Reporting Information Management System from 2015 to 2021 were collected, descriptive epidemiology analysis was performed (three distribution of the disease). SaTScan v9.6 and ArcMap 10.7 were used for spatio-temporal cluster analysis.Results:A total of 368 VL cases were reported from 2015 to 2021, 89.13% (328/368) were concentrated in Longnan City and Gannan Tibetan Autonomous Prefecture. The number of VL cases increased year by year from 2015 to 2017, reaching a peak in 2017 (79 cases, accounting for 21.47%), and had decreased year by year since 2018. There were cases every month throughout the year, and the peak was in April in spring (38 cases). The ratio of male to female patients was 1.3 ∶ 1.0 (208/160). Scattered children aged less than 5 years old were more common (41.30%, 152/368). The spatio-temporal cluster analysis showed that both the spatial and temporal aggregation zones of VL in Tanchang County and Chengxian County were of statistical significance ( P < 0.05). Conclusion:The incidence of VL in Gansu Province is showing a low epidemic trend, having spatio-temporal aggregation, and precise monitoring and prevention and control should be strengthened in epidemic areas with different prevalence levels.
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Objective:To observe the epidemiological characteristics and transmission chain of COVID-19 in Harbin, and to provide epidemiological evidence for improving the COVID-19 preventive measures and optimizing prevention and control strategies.Methods:The epidemic situation of COVID-19 in Harbin in January 2021 was analyzed by using the Infectious Disease Report Information Management System and the Public Health Emergency Management Information System of the China Disease Prevention and Control Information System, the epidemic situation information publicly released by the Heilongjiang Provincial Health Commission, and the epidemiological report of Heilongjiang Province Certer for Disease Control and Prevention and Harbin Center for Disease Control and Prevention. The main transmission chains were sorted out through combination of epidemiological field investigation, serological testing, gene sequencing, big data and other means.Results:From January 12 to February 4, 2021, 295 cases of COVID-19 infection (including confirmed cases and asymptomatic infections) were reported in Harbin, which affected 6 districts of Harbin and were concentrated in 41 of the 274 townships in the city. The sex ratio of male to female was 1.00∶1.12 (139∶156); the age ranged from 1 to 86 years old, and the median age was 45 years old. The proportion of confirmed cases and asymptomatic infection was 1.00 ∶ 1.02 (146 ∶ 149), and there was a significant difference in the distribution of different ages between them ( P = 0.042). The cases were mainly found through the health screening of the centralized isolation personnel (178 cases, 60.3%). Other detection methods included active screening (87 cases, 29.5%), screening of the home isolation personnel (26 cases, 8.8%), and medical treatment in medical institutions (4 cases, 1.4%). The main transmission chain of the outbreak was the case associated with a food processing enterprise, with a total of 259 cases, accounting for 87.8% of the total cases. The gene sequencing results showed that the case sequence was homologous with that of Wangkui County, Suihua City, Heilongjiang Province. Conclusions:A food processing enterprise is involved in the main transmission chain, which indicates that the epidemic prevention and control measures needs to be further optimized. Specifically, the supervision and management of food processing enterprises, cold chain storage companies and other enterprises should be strengthened. High attention should be paid to the hidden dangers of COVID-19 in large and medium sized enterprises with hermetic space in Harbin.
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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 analyze the epidemic situation and epidemiological characteristics of malaria in Lishui City from 2013 to 2018, so as to provide the evidence for formulating the malaria control strategy. MethodsThe data pertaining malaria cases in Lishui City from 2013 to 2018 were captured from National Notifiable Communicable Disease Reporting System and the Information System for Parasitic Diseases Control and Prevention, and the epidemiological features of malaria cases were analyzed. Results A total of 119 malaria cases were reported in Lishui City from 2013 to 2018, including 101 cases with falciparum malaria (84.87%), 6 cases with vivax malaria (5.04%), 8 cases with ovale malaria (6.72%), and 4 cases with mixed infection (3.36%). Among the 119 cases, there were one local case with blood transfusion-induced malaria and 118 cases with over- seas imported malaria. There were 98.32% of the imported malaria cases acquiring infection in African countries, and most cases were reported in Qingtian County (60.50%) and Liandu District (22.69%). In addition, 86.55% of the malaria cases were detected in individuals at ages of 20 to 50 years, and most cases were found in oversea workers (52.94%) and businessmen (38.65%). Conclusions Most of the malaria cases in Lishui City are imported from Africa, and the monitoring and health education pertaining to malaria control knowledge requires to be intensified among high-risk populations.
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At present, the 2019-novel coronavirus (2019-nCoV) is rampant all over the country, and controlling the spread of its epidemic has become a top priority. It is very difficult to control the epidemic spreading because there is no specific drug to fight against it. Therefore, it is urgent task for us to develop a specific drug as soon as possible, and attracting worldwide attention. The studies on anti-2019-nCoV drugs were generally carried out in three modes, as vaccine, chemical drugs and traditional Chinese medicine (TCM). Because the developing on vaccines and chemicals takes too long, it is hard to solve the urgent problem. Moreover, the RNA of coronavirus has been recombined so quickly that the vaccines and drugs studied with great efforts not only may miss the epidemic time, but also cannot be used in the next generation of new coronavirus treatment, as a result that the work of epidemic prevention is formidable. However, the prescriptions from traditional Chinese medicine theory can cure the epidemic disease, but how to develop it into a specific drug with clear chemical composition and clear pharmacologic mechanism, is also an urgent problem to be solved. In this paper, the new coronavirus and its drug development are reviewed, while the advantages and disadvantages are analyzed, and the drug dilemma research phenomenon is clarified by using the supramolecular “qi chromatography” theory. It is suggested that the strategy of anti-coronavirus drug developing should be put forward based on the impact of “qi chromatography” of biological supramolecular “imprinting template”, in order to develop new drugs against 2019-nCoV to control the spread of the epidemic as quick as we can, and establish a new research and development model of anti-coronavirus drug on integration of traditional Chinese and Western medicine, turning passive into active.
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Objective@#To report our experience in the prevention and control of COVID-19 in the tramatological and microsurgical wards.@*Methods@#A retrospective study was conducted of the COVID-19 infections in the 51 medical staff and patients from 31 December, 2019 to 14 February, 2020 at Department of Traumatology and Microsurgery, Zhongnan Hospital. The prevention and control measures were upgraded after 20 January, 2020 to address the serious epidemic situation, including preventive disinfection, terminal disinfection and personnel disinfection in wards, management of emergency patients, inpatients and patients suspected of COVID-19 infection, and training, management and psychological intervention of medical staff. The outcomes resulting from different prevention and control measures before and after 20 January, 2020 were compared.@*Results@#From 31 December, 2019 to 20 January, 2020, there were altogether 3 cases of definite COVID-19 infection and 2 ones of suspected COVID-19 infection at the department. One doctor, one technician and one nurse were diagnosed as definite COVID-19 infection while one nurse and one patient as suspected COVID-19 infection. The 4 medical staff members infected were cured and discharged before 14 February, 2020 but unfortunately the one patient infected died. After the prevention and control measures for COVID-19 infection had been upgraded since 20 January, 2020, 12 out of the 29 emergency patients at our wards had fever (body temperature ≥37.3℃) but none COVID-19 infection. All the 47 medical staff on duty at the department got trained and none of them was infected by COVID-19 or suffered from mental disorder.@*Conclusion@#In the epidemic of COVID-19, as our prevention and control measures for COVID-19 infection were adjusted and upgraded in response to the changing epidemic situation, they eliminated nosocomial infection scientifically and effectively and ensured life safety of the medical staff and patients at the department.
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Objective To analyze the epidemic situation of malaria in Jiangsu Province in 2019, so as to provide the scientific basis for the development of the strategy for the prevention of re-introduction of imported malaria. Methods The malaria case report information, epidemiological case investigation information, epidemic foci investigation and management report in Jiangsu Province in 2019 were collected, and all epidemiological data were descriptively analyzed. Results A total of 244 malaria cases were reported in Jiangsu Province in 2019, and all cases were laboratory-confirmed overseas imported cases, including 4 cases with vivax malaria, 206 cases with falciparum malaria, 12 cases with malariae malaria and 22 cases with ovale malaria. In 2019, there were 12 malaria cases progressing into severe cases in Jiangsu Province, with one death. Nanjing, Nantong, Lianyungang, Taizhou and Changzhou cities contributed the largest number of malaria cases in 2019, with the number of malaria cases accounting for 59.84% of total cases in Jiangsu Province. The infections occurred in Papua New Guinea (2 cases), Pakistan (1 case) and 27 African countries (241 cases), including Angola, the Democratic Republic of the Congo, Nigeria, Equatorial Guinea, Cote d'Ivoire and so on. There were 77 cases (31.55%) with a visit to doctor on the day of onset, and 146 cases (59.84%) within 1 to 3 days after onset. In addition, there were 149 cases (61.06%) with definitive diagnosis at the first visit and 77 cases (31.55%) diagnosed within 1 to 3 days after the visit, and the mean duration from the visit to definitive diagnosis was (0.80 ± 1.59) d, which significantly shortened as compared to that (1.34 d ± 2.59 d) in 2018 (U = 2.53, P < 0.05). Conclusions Intensifying the surveillance and management of imported malaria and improving the diagnostic capability of imported malaria and the treatment of severe malaria cases are required to consolidate the achievements of malaria elimination in Jiangsu Province.
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Objective To analyze the epidemic situation of malaria in Jiangsu Province in 2018, so as to provide scientific evidence for formulating post-elimination malaria surveillance schemes and technical measures in Jiangsu Province. Methods The malaria case report cards, epidemiological individual investigation forms of malaria cases and foci data were collected from Jiangsu Province in 2018, and the epidemic situation of malaria was descriptively analyzed. Results A total of 243 malaria cases were reported in Jiangsu Province in 2018, which increased by 1.67% in relative to in 2017 (239 cases), and these cases included 171 cases with falciparum malaria, 14 cases with vivax malaria, 15 cases with quartan malaria, 42 cases with ovale malaria and a case with mixed infection of P. vivax and P. ovale. All cases were overseas imported, and no local secondary cases were found. The malaria cases were predominantly workers (76.54%). Nantong City (48 cases), Yangzhou City (33 cases) and Taizhou City (22 cases) were the most 3 cities with the largest number of malaria cases across Jiangsu Province. The malaria infections predominantly occurred in African areas (96.30%), and the other 9 cases had infections in Asia (8 cases) and Central America (1 case). There were 125 cases (51.44%) and 91 cases (37.45%) with definitive diagnosis at the day of admission and within 1 to 3 days post-admission, respectively. The percentages of definitive diagnosis at initial diagnosis were 48.27%, 88.76% and 97.30% at township-, county- and city-level medical institutions, respectively, and the percentage of definitive diagnosis at initial diagnosis was significantly lower in township-level medical institutions than in county- (χ2 = 21.47, P < 0.01) and city-level medical institutions (χ2 = 32.86, P < 0.01). Conclusions There are no local malaria cases in Jiangsu Province; however, the number of overseas imported malaria cases remains high in China. In the future, improving the post-elimination malaria surveillance system, enhancing the awareness of malaria prevention and control knowledge among high-risk populations, increasing the diagnostic capability of malaria in medical institutions, and improving the management of imported malaria cases should be performed to consolidate the achievements of malaria elimination.
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Objective To describe and analyze the epidemiological characteristics of malaria in Dalian City, so as to provide the evidence for adjusting and formulating malaria control strategy and measures, being in accordance with the practical situation in Dalian City. Methods The data of malaria cases in Dalian City from 2005 to 2016 were collected from China Diseases Surveillance Information Reporting Management System (DSIRMS), to describe and analyze the epidemiologic characteristics of malaria in Dalian City. Results A total of 143 malaria cases were reported in Dalian from 2005 to 2016, including 115 laboratory diagnosed cases, 27 clinically diagnosed cases, and 1 suspected diagnosed case. Among the 115 laboratory diagnosed patients, 65 patients were infected with Plasmodium falciparum, 19 were infected with P. vivax, and 15 had mixed infection, 4 were infected with P. ovale, 3 were infected with P. malariae, and 9 were unclassified. All the cases were imported, 127 were imported from Africa, accounting for 88.81%, mainly were imported from Equatorial Guinea, Liberia, Ghana and Nigeria. Most of the cases were imported from May to October, accounting for 58.74% (84/143), and the imported cases emerged a small peak in August. The ratio of males to females was 10∶1, and the median age was 42 years. Among the total cases, fishermen, migrant workers, and work-man accounted for 55.24% (79/143). Seventy-five patients lived in rural districts, and 68 patients lived in urban districts. The median interval from backing to China to disease onset was 8 days. The proportion of disease onset within one month after backing to China was 76.27% (90/118). The median interval from disease onset to diagnosis was 4 days, and the longest interval was 71 days. Totally 141 patients were cured and 2 died. Conclusion In order to avoid malaria death, we should strengthen the malaria prevention and control, especially in rural districts, enhance the training for professionals in the county health facilities, and the surveillance and health education for those who are returned from malaria-endemic areas.
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Objective To understand the malaria epidemic situation and characteristics in Jiangsu Province in 2017, so as to provide the evidence for formulating the targeted strategy of malaria elimination. Methods The data of malaria cases in Jiangsu Province in 2016 were collected from China’s Routine Diseases Surveillance Information System (CRDSIS). Results Totally, 239 imported malaria cases were reported in Jiangsu Province in 2017, and the cases decreased by 22.40% compared to 308 cases in 2015. Except 2 malaria case caused by blood transfusion, the rest patients were all imported. Among them, there were 163 falciparum malaria cases, 21 vivax malaria cases, 11 quartan malaria cases, 43 ovale malaria cases, and 1 mixed infection case (Plasmodium falciparum and P. ovale). The numbers of imported cases of Nantong (39 cases, 16.32%), Suzhou (26 cases, 10.88%), Taizhou (25 cases, 10.46%), Huai’an (24 cases, 10.04%), and Lianyungang (22 cases, 9.21%) ranked in the top 5 cities across Jiangsu Province, the malaria cases in the five cities accounted for 56.90% (136/239). The infection source areas of the imported malaria cases included Africa (225 cases), Asia (8 cases), Oceania (2 cases), and South America (2 cases). Conclusions Jiangsu Province has no local malaria cases for 6 consecutive years. Despite the imported cases in 2017 decreased some-what compared to that in 2016, it is still necessary to strengthen the surveillance of imported malaria cases and improve malaria diagnosis and treatment in the whole province.
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Objective To describe and analyze the epidemiological characteristics of malaria in Dalian City, so as to provide the evidence for adjusting and formulating malaria control strategy and measures, being in accordance with the practical situation in Dalian City. Methods The data of malaria cases in Dalian City from 2005 to 2016 were collected from China Diseases Surveillance Information Reporting Management System (DSIRMS), to describe and analyze the epidemiologic characteristics of malaria in Dalian City. Results A total of 143 malaria cases were reported in Dalian from 2005 to 2016, including 115 laboratory diagnosed cases, 27 clinically diagnosed cases, and 1 suspected diagnosed case. Among the 115 laboratory diagnosed patients, 65 patients were infected with Plasmodium falciparum, 19 were infected with P. vivax, and 15 had mixed infection, 4 were infected with P. ovale, 3 were infected with P. malariae, and 9 were unclassified. All the cases were imported, 127 were imported from Africa, accounting for 88.81%, mainly were imported from Equatorial Guinea, Liberia, Ghana and Nigeria. Most of the cases were imported from May to October, accounting for 58.74% (84/143), and the imported cases emerged a small peak in August. The ratio of males to females was 10∶1, and the median age was 42 years. Among the total cases, fishermen, migrant workers, and work-man accounted for 55.24% (79/143). Seventy-five patients lived in rural districts, and 68 patients lived in urban districts. The median interval from backing to China to disease onset was 8 days. The proportion of disease onset within one month after backing to China was 76.27% (90/118). The median interval from disease onset to diagnosis was 4 days, and the longest interval was 71 days. Totally 141 patients were cured and 2 died. Conclusion In order to avoid malaria death, we should strengthen the malaria prevention and control, especially in rural districts, enhance the training for professionals in the county health facilities, and the surveillance and health education for those who are returned from malaria-endemic areas.
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Objective To understand the malaria epidemic situation and characteristics in Jiangsu Province in 2017, so as to provide the evidence for formulating the targeted strategy of malaria elimination. Methods The data of malaria cases in Jiangsu Province in 2016 were collected from China’s Routine Diseases Surveillance Information System (CRDSIS). Results Totally, 239 imported malaria cases were reported in Jiangsu Province in 2017, and the cases decreased by 22.40% compared to 308 cases in 2015. Except 2 malaria case caused by blood transfusion, the rest patients were all imported. Among them, there were 163 falciparum malaria cases, 21 vivax malaria cases, 11 quartan malaria cases, 43 ovale malaria cases, and 1 mixed infection case (Plasmodium falciparum and P. ovale). The numbers of imported cases of Nantong (39 cases, 16.32%), Suzhou (26 cases, 10.88%), Taizhou (25 cases, 10.46%), Huai’an (24 cases, 10.04%), and Lianyungang (22 cases, 9.21%) ranked in the top 5 cities across Jiangsu Province, the malaria cases in the five cities accounted for 56.90% (136/239). The infection source areas of the imported malaria cases included Africa (225 cases), Asia (8 cases), Oceania (2 cases), and South America (2 cases). Conclusions Jiangsu Province has no local malaria cases for 6 consecutive years. Despite the imported cases in 2017 decreased some-what compared to that in 2016, it is still necessary to strengthen the surveillance of imported malaria cases and improve malaria diagnosis and treatment in the whole province.
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Objective To investigate the epidemic situation and its epidemic characteristics of malaria in Qingdao City from 2012 to 2017, so as to provide the evidence for the prevention and control of malaria in this city. Methods The data of cases and epidemiological characteristics of malaria in Qingdao City, 2012–2017 were collected from the China’s disease prevention and control system infectious disease report information management system and parasitic disease prevention and control information management system, and analyzed. Results A total of 103 cases of malaria were reported in Qingdao City from 2012 to 2017, and all of them were imported. Among them, 98 (95.15%) were imported from Africa and 5 (4.85%) from Asia. There were 92 laboratory confirmed cases (89.32%) and 11 (10.68%) clinically diagnosed cases. The highest incidence occurred in 2016 (0.28/105) . According to the classification of cases, there were 87 falciparum malaria cases (84.47%), 13 vivax malaria cases (12.62%), and 3 ovale malaria cases (2.91%) . These patients were mainly young men, and the male to female ratio was 19.6∶1. There were malaria case reports in each month, and the peak onset season was not obvious. Newly diagnosed and confirmed units were mainly municipal medical institutions; the median of onset-definite diagnosis was 4 days. There was one death case, but there were no recurrence, reburning, and imported secondary cases. Conclusion There were no local malaria cases in Qingdao City from 2012 to 2017. The prevention and control of imported malaria is the focus of the future work.
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Objective To analyze the epidemic situation of malaria in Jiangsu Province in 2018, so as to provide scientific evidence for formulating post-elimination malaria surveillance schemes and technical measures in Jiangsu Province. Methods The malaria case report cards, epidemiological individual investigation forms of malaria cases and foci data were collected from Jiangsu Province in 2018, and the epidemic situation of malaria was descriptively analyzed. Results A total of 243 malaria cases were reported in Jiangsu Province in 2018, which increased by 1.67% in relative to in 2017 (239 cases), and these cases included 171 cases with falciparum malaria, 14 cases with vivax malaria, 15 cases with quartan malaria, 42 cases with ovale malaria and a case with mixed infection of P. vivax and P. ovale. All cases were overseas imported, and no local secondary cases were found. The malaria cases were predominantly workers (76.54%). Nantong City (48 cases), Yangzhou City (33 cases) and Taizhou City (22 cases) were the most 3 cities with the largest number of malaria cases across Jiangsu Province. The malaria infections predominantly occurred in African areas (96.30%), and the other 9 cases had infections in Asia (8 cases) and Central America (1 case). There were 125 cases (51.44%) and 91 cases (37.45%) with definitive diagnosis at the day of admission and within 1 to 3 days post-admission, respectively. The percentages of definitive diagnosis at initial diagnosis were 48.27%, 88.76% and 97.30% at township-, county- and city-level medical institutions, respectively, and the percentage of definitive diagnosis at initial diagnosis was significantly lower in township-level medical institutions than in county- (χ2 = 21.47, P < 0.01) and city-level medical institutions (χ2 = 32.86, P < 0.01). Conclusions There are no local malaria cases in Jiangsu Province; however, the number of overseas imported malaria cases remains high in China. In the future, improving the post-elimination malaria surveillance system, enhancing the awareness of malaria prevention and control knowledge among high-risk populations, increasing the diagnostic capability of malaria in medical institutions, and improving the management of imported malaria cases should be performed to consolidate the achievements of malaria elimination.
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Objective@#To analyze the plague monitoring results in Ulanqab City of Inner Mongolia in 2018, to master the changes in rat density and the prevalence of plague in rats, and provide a basis for scientific prevention and control of plague.@*Methods@#According to "The Plague Monitoring Scheme of Inner Mongolia", we surveyed Siziwang Banner, Chahar Right Back Banner, Huade County, and Shangdu County of Ulanqab City from April to November 2018 to monitor the plague. Rat density was surveyed using a one-day bow clamp method; small rodent was surveyed using a 5 m clamping method. Rodents were obtained by sample method, 5 m clamping method, daily method, collecting dead animals and the like, and fleas were picked up from the captured rats and rat nest. The rodents and fleas were carried out pathogen detection, the serum of rodents was tested by indirect hemagglutination test. Laboratory test results were analyzed based on the "Diagnostic Criteria for Plague" (WS 279-2008).@*Results@#Totally 1 463 mice were captured overlapping a monitored area of 416 hm2, the average rat density was 3.52 per hectare; the number of Meriones unguiculatus was 1 235, and the rat density was 2.97 per hectare. Totally 1 603 mice were grooming, 404 mice with fleas, the flea infected rate was 25.20%, the number of fleas were 1 348, and the flea index was 0.84. A total of 22 mouse nests were dug, 17 nests with fleas, the flea infected rate was 77.27%, the number of fleas were 131, and the flea index was 5.95. Totally 1 603 rodents were checked by etiology, the results showed that 7 plague rats were all Meriones unguiculatus. Totally 1 479 fleas of 581 groups were cultured, 14 fleas of 5 groups were detected, 3 fleas of 1 group in Siziwang Banner, and 11 fleas of 4 groups in Huade County. Totally 243 samples of murine animal serum were tested and the results were all negative.@*Conclusions@#The epidemic of plague in Ulanqab City is in an active state, so monitoring should be strengthened in this area to prevent the prevalence of human plague.
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Objective To analyze the plague monitoring results in Ulanqab City of Inner Mongolia in 2018,to master the changes in rat density and the prevalence of plague in rats,and provide a basis for scientific prevention and control of plague.Methods According to "The Plague Monitoring Scheme of Inner Mongolia",we surveyed Siziwang Banner,Chahar Right Back Banner,Huade County,and Shangdu County of Ulanqab City from April to November 2018 to monitor the plague.Rat density was surveyed using a one-day bow clamp method;small rodent was surveyed using a 5 m clamping method.Rodents were obtained by sample method,5 m clamping method,daily method,collecting dead animals and the like,and fleas were picked up from the captured rats and rat nest.The rodents and fleas were carried out pathogen detection,the serum of rodents was tested by indirect hemagglutination test.Laboratory test results were analyzed based on the "Diagnostic Criteria for Plague" (WS 279-2008).Results Totally 1 463 mice were captured overlapping a monitored area of 416 hm2,the average rat density was 3.52 per hectare;the number of Meriones unguiculatus was 1 235,and the rat density was 2.97 per hectare.Totally 1 603 mice were grooming,404 mice with fleas,the flea infected rate was 25.20％,the number of fleas were 1 348,and the flea index was 0.84.A total of 22 mouse nests were dug,17 nests with fleas,the flea infected rate was 77.27％,the number of fleas were 131,and the flea index was 5.95.Totally 1 603 rodents were checked by etiology,the results showed that 7 plague rats were all Meriones unguiculatus.Totally 1 479 fleas of 581 groups were cultured,14 fleas of 5 groups were detected,3 fleas of 1 group in Siziwang Banner,and 1 1 fleas of 4 groups in Huade County.Totally 243 samples of murine animal serum were tested and the results were all negative.Conclusions The epidemic of plague in Ulanqab City is in an active state,so monitoring should be strengthened in this area to prevent the prevalence of human plague.
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Objective To investigate the epidemic situation and its epidemic characteristics of malaria in Qingdao City from 2012 to 2017, so as to provide the evidence for the prevention and control of malaria in this city. Methods The data of cases and epidemiological characteristics of malaria in Qingdao City, 2012–2017 were collected from the China’s disease prevention and control system infectious disease report information management system and parasitic disease prevention and control information management system, and analyzed. Results A total of 103 cases of malaria were reported in Qingdao City from 2012 to 2017, and all of them were imported. Among them, 98 (95.15%) were imported from Africa and 5 (4.85%) from Asia. There were 92 laboratory confirmed cases (89.32%) and 11 (10.68%) clinically diagnosed cases. The highest incidence occurred in 2016 (0.28/105) . According to the classification of cases, there were 87 falciparum malaria cases (84.47%), 13 vivax malaria cases (12.62%), and 3 ovale malaria cases (2.91%) . These patients were mainly young men, and the male to female ratio was 19.6∶1. There were malaria case reports in each month, and the peak onset season was not obvious. Newly diagnosed and confirmed units were mainly municipal medical institutions; the median of onset-definite diagnosis was 4 days. There was one death case, but there were no recurrence, reburning, and imported secondary cases. Conclusion There were no local malaria cases in Qingdao City from 2012 to 2017. The prevention and control of imported malaria is the focus of the future work.
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Objective To explore the epidemic situation and epidemiological characteristics of imported malaria in Beijing City in 2017, so as to provide the evidence for developing malaria control interventions. Methods The data of registered malaria cases were collected and analyzed by using descriptive epidemiological methods. Results A total of 90 malaria cases were reported in Beijing in 2017, and all the cases were imported. The 90 cases included 74 cases of falciparum malaria (82.22%), 10 cases of vivax malaria (11.11%), 4 cases of ovale malaria (4.45%) and 2 cases of malariae malaria (2.22%), and 97.78% of the malaria patients were at ages of 19 to 61 years. Eighty-one cases (90.00%) came back from Africa and 44 cases (48.89%) suffered two or more courses of malaria. Among the 66 patients with disease onset after returning from abroad, 53 cases (80.30%) of falciparum malaria had an onset within two weeks. The patients went to the malaria-endemic areas were mainly because of working (46.34%) or business (41.46%). Eighty-nine cases used mosquito nets while living in malaria-endemic areas and 59 cases used mosquito repellents in addition. Conclusions The prevention and control for imported malaria is still the major target for the surveillance in Beijing City. The highly efficient surveillance system for malaria should be sustained, and the awareness of the disease among migrant workers should be enhanced.
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Objective To explore the epidemic situation and epidemiological characteristics of imported malaria in Beijing City in 2017, so as to provide the evidence for developing malaria control interventions. Methods The data of registered malaria cases were collected and analyzed by using descriptive epidemiological methods. Results A total of 90 malaria cases were reported in Beijing in 2017, and all the cases were imported. The 90 cases included 74 cases of falciparum malaria (82.22%), 10 cases of vivax malaria (11.11%), 4 cases of ovale malaria (4.45%) and 2 cases of malariae malaria (2.22%), and 97.78% of the malaria patients were at ages of 19 to 61 years. Eighty-one cases (90.00%) came back from Africa and 44 cases (48.89%) suffered two or more courses of malaria. Among the 66 patients with disease onset after returning from abroad, 53 cases (80.30%) of falciparum malaria had an onset within two weeks. The patients went to the malaria-endemic areas were mainly because of working (46.34%) or business (41.46%). Eighty-nine cases used mosquito nets while living in malaria-endemic areas and 59 cases used mosquito repellents in addition. Conclusions The prevention and control for imported malaria is still the major target for the surveillance in Beijing City. The highly efficient surveillance system for malaria should be sustained, and the awareness of the disease among migrant workers should be enhanced.
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Objective To understand the epidemiological characteristics of imported malaria and the control and diagnostic capacities of the medical institutions in Wuhan City,so as to offer the evidence for formulating the surveillance and control strat-egies.Methods From 2008 to 2017,the epidemiological data of imported malaria were collected.The information including gender,age,distribution,vocational background,positive rate of fever patients,and time of final diagnosis was analyzed with the descriptive statistic method.The Plasmodium species composition and infection source were analyzed by chi square test.The initial and confirmed diagnosis abilities of medical institutions were analyzed by rank sum test.Results Totally,424 imported malaria cases were reported,including 301 falciparum malaria cases(70.99％).The male population aged 20 to 49 years was the main morbidity group,and the incidence was not related to seasons.For the parasite species,there was a significant differ-ence between African countries and Southeast Asian countries(Χ 2=205.83,P<0.01).Plasmodium ovale and P.malariae were all imported from sub-Saharan Africa.For diagnostic capacities of the medical institutions at different levels,the initial diag-nosis(Z=-3.89,P<0.01)and confirmed diagnosis(Χ2=53.88,P<0.01)were significantly different,respectively.The abili-ty of malaria diagnosis was improved rapidly in the clinical laboratory after 2008 and achieved to 100％in 2010.The detection rate within 24 hours increased to at least 90％and the detection rate within 6 days decreased to 0 in 2016.Conclusions Al-though the medical institutions in Wuhan City have strong ability to treat imported malaria,they are still faced with a serious sit-uation for malaria control and elimination.The capacity building should be strengthened constantly.