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Objective:To analyze the epidemic characteristics of Cornona virus disease 2019 (COVID-19) in Wangkui County, Heilongjiang Province, and to provide a reference for optimizing epidemic prevention and control strategies.Methods:The epidemic characteristics of COVID-19 in Wangkui County, Heilongjiang Province in January 2021 were analyzed by applying the national infectious disease report system and information management system of Heilongjiang Provincial Center for Disease Control and Prevention, the public health emergency report management information system, the epidemiological investigation report of the Heilongjiang Provincial Center for Disease Control and Prevention and Suihua Municipal Certer for Disease Control and Prevention, and the epidemic information publicly released by the Health Commission of Heilongjiang Province.Results:From January 9 to February 5, 2021, 804 cases infected with Cornona virus were reported in Wangkui County, with an infection rate of 280.29/100 000. The epidemic affected 20 districts and counties in 6 cities, including Suihua, Harbin, Mudanjiang, Qiqihar, Yichun and Daqing. The sex ratio of male to female was 1.08 ∶ 1.00 (418 ∶ 386), the age ranged from 3 months to 93 years old, and the median age was 50 years old. The proportion of confirmed cases and asymptomatic infection was 1.23 ∶ 1.00 (444 ∶ 360), there were significant differences in gender, age and occupation between them ( P < 0.05). There were 314 places where the aggregation epidemic occurred, with family aggregation as the main way (300 households, 95.54%). The places with the highert average number of cases were banquets (25.75 cases/place) and grocery stores/chess and card rooms (16.00 cases/place). Conclusions:In January 2021, the epidemic of COVID-19 in Wangkui County is a typical outbreak in rural areas of North China. The main reasons for the rapid spread of the epidemic are a large number of gathering activities, frequent contact of personnel in confined spaces and other factors.
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OBJECTIVE@#To analyze the hearing loss profiles in patients with tinnitus, and then provide clinical foundation for further studying the etiology and examination methods of tinnitus.@*METHOD@#Ear specialist examination, acoustic impedance test,normal frequency pure tone audiometry and extended high frequency audiometry were applied to 200 patients with chief complaint of subjective tinnitus.@*RESULT@#Among the 200 tinnitus cases, 123 (61.5%) patients were diagnosed with unilateral tinnitus, 77 (38.5%) patients with bilateral tinnitus and 46 (23.0%) cases with normal hearing. In those patients with unilateral tinnitus, by comparing the hearing threshold of affected side and contralateral side (0.125-8 kHz), the difference was statistically significant (P 10 kHz), the difference between two groups was not statistically significant (P > 0.05). There was significant difference in hearing threshold between tinnitus patients with normal and abnormal hearing in normal frequency (P < 0.05), meantime the detection rate in abnormal hearing group was lower than the normal group.@*CONCLUSION@#Tinnitus can occur in people with normal hearing. Early in tinnitus,further study need be undertaken on whether the audiometry extended high frequency can offer the early evidence of hearing loss for tinnitus patients or not.