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Objective: To analyze hemorrhagic fever cases since 2000 the county occurred from 2000 to 2007 Jingyuan County renal syndrome hemorrhagic fever epidemiological characteristics; identify a county residential areas and wild rodent species, density, carriers of the virus situation; case investigation and analysis of the clinical manifestations of the patients, the proportion of related risk factors to identify a high factor, to explore the possibility of infection with infected premises; identify county general population with renal syndrome hemorrhagic fever IgG positive rate and its influencing factors, and provide the basis for the Ningxia renal syndrome hemorrhagic fever prevention strategies and the improvement of immunization programs. Methods: A descriptive epidemiological research methods to be retrospective description of the Jingyuan County hemorrhagic fever epidemic data from 2000 to 2007. Multi-stage random sampling method from eight of the county under the jurisdiction of the township (town) as a sampling unit, each township 4 administrative villages were randomly selected as secondary sampling units, a total of pits 12 randomly selected three towns administrative village; administrative villages in the pits neighborhoods and wild rodent species composition, density, infection rate survey. Case investigation and analysis of the county cases of hemorrhagic fever occurred since 2000. The multi-stage random sampling method, randomly selected from the county's three township (town) as a sampling unit, each township (town) as secondary sampling units collected four administrative villages, each administrative village to extract two teams as three sampling units, pits 24 teams. IgG positive rate of hemorrhagic fever with part of the population of the 24 teams of area residents and county investigation and its influencing factors are analyzed. Results: 2000 to 2007 Jingyuan County, there were 26 cases of hemorrhagic fever, the average annual incidence rate of 2.84/10, 3 patients died, mortality 0.33/10 million. The highest incidence in 2002 to 11.14/10 million, no cases of hemorrhagic fever occurred in 2001, 2003 and 2007; difference was statistically significant (P lt; 0.01) incidence in different years. Hemorrhagic fever occurred in six townships, the highest the Huanghua Township incidence rate for 5.68/10 million, Xinmin Township lowest, as 0.81/10 million; the different towns incidence rate differences had no statistical significance (P gt; 0.05). September to November incidence of up to a total of 19 cases, accounting for 73.2% of the total incidence. 21 males, 5 females, the sex ratio was 4.2:1. 20 to 50 years the incidence of 16 cases, accounting for 61.54%. Farmers incidence of 19 cases, accounting for 73.2%. Rodent species composition, and residential areas for the dominant species Rattus norvegicus, 55.6%; wild CRICETULUS the dominant species, accounting for 53.7%. Neighborhoods rat density was 1.60%, the wild 1.63%, 1.62% of the total density of rodents; different habitats rat density difference without statistical significance (P gt; 0.05). Rodent density 0.80% in September, October rat density was 1.89%; different month rat density difference was statistically significant (P lt; 0.05). Xinmin Township rat density was 1.50%, flourished Township, 1.36%, 1.86%, perfume town; different township rat density difference without statistical significance (P gt; 0.05). 59 rat lung, blood samples hemorrhagic fever virus antigen, antibody test were negative. Accounted for 87.5% of the 16 cases in the the case investigation follow-up to the men, aged 20 to 50 accounted for 75.0%, accounted for 68.8% of farmers, primary and below accounted for 56.2%; 9 to 11 months accounted for 87.5% of the in; Jing Heyuan town and 31.2% Huanghua Township, perfume town of 25.0% each, accounted for 18.8% of the county; accounted for 81.2% of light and medium cases. More typical clinical manifestations of the patients, the fever, \hypotension, shock proportion is relatively low. Laboratory tests, leukocytosis accounted for 62.5%, 56.3% platelets, urine protein positive 37.5% accounted for 31.3%, urinary tube hematuria. Food stocks (68.8%) of the aerosol-related factors, their home, the food stocks place of work (75.0%), cleaning the environment, health (75.0%), a higher proportion of cold (62.5%). History of exposure to contact with rodents (68.8%) (56.3%), grass sit, the rat holes near the sitting and lying (54.6%), carrying firewood (50.0%), higher field labor proportion (68.8%). Gastrointestinal related factors, tableware mouseproof effect difference (56.3%) (56.3%), poor cooked food storage mouseproof effect, food not heating leftovers (62.5%), food (56.3%) and a high proportion of raw food. Housing-related factors, the house is located (56.3%) of the edge of the village, next to the field (56.3 percent), surrounded by weeds (81.3%), housing more than five years (81.3%), incomplete damaged the wall (56.3%) live in houses of clay (56.3%), ground soil (75.0%) higher proportion. Health status-related factors, poor health (56.2%) of the living room, kitchen hygiene (56.2%) and a higher proportion. The group of patients and their family members previously had no history of hemorrhagic fever, no hemorrhagic fever vaccination history. Scene investigation of blood collection 1572 copies, 287 hemorrhagic fever IgG positive, the positive rate was 18.26%. Different towns, age, occupation, education level, residential location, rodents history of exposure, previous history of hemorrhagic fever, hemorrhagic fever vaccination history, the vaccinated IgG positive rate difference was statistically significant (P lt; 0.05); hemorrhagic fever vaccine IgG positive rate of different vaccination needle times were compared by the trend of the chi-square test, trend χ 2 = 4.407, P = 0.036 lt; 0.05, the difference was statistically significant. The application of multivariate unconditional logistic regression χ2 analysis meaningful variable hemorrhagic fever IgG positive rate influence factor analysis, the final variable to enter the model of hemorrhagic fever vaccine vaccinated and education level. Conclusion: Ningxia Jingyuan County HFRS incidence declining trend. Although the county rodent density is very low, the carriers of the virus were not detected, but should continue to strengthen epidemic surveillance to prevent the epidemic from a rebound in rodents. Multiple male young farmers, county hemorrhagic fever, more common in 9-11 months, the regional distribution is more dispersed, light and medium high proportion of cases. Stocks, before the onset of the room cleaning environmental health; contact with rodents, grass and rat holes near the sitting and lying, carrying firewood, field labor; and cooked to tableware mouseproof effect, eating leftovers, eating raw food; residence located in the edge of the village, walls torn damage, residential adjacent fields, the weeds around the residence, building time for more than five years, live in houses of clay, a higher proportion of the ground soil, housing windows and doors broken. Hemorrhagic fever vaccine vaccinated and cultural level of the general population for the county renal syndrome hemorrhagic fever IgG positive rate of the main factors. Vaccination of hemorrhagic fever vaccine and to raise the the groups cultural level of the population of hemorrhagic fever with of Ningxia renal syndrome epidemic control and immunization programs to improve the significance.
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