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【Objective】 To assess the epidemiological characteristics and transmission risk of asymptomatic COVID-19 infection in Shaanxi Province. 【Methods】 A dense population database of COVID-19 cases in Shaanxi Province was constructed as of March 26, 2020, and 28 asymptomatic infected patients were selected through case epidemiological investigation report for descriptive analysis. 【Results】 In Shaanxi Province, the majority of asymptomatic COVID-19 infections were in the 20-59 years old group, and women took up a higher proportion than men. 82.14% of asymptomatic infections were found in the centralized isolation state. Nearly 80% of asymptomatic infections and confirmed cases were mainly exposed by living together in the family. The median number of days from last contact with the source of infection for all asymptomatic infected persons was 13, with 3 (10.71%) showing clinical symptoms. Epidemiological investigations showed that asymptomatic infections could spread as a result of shared family life. 【Conclusion】 At present, imported cases in Shaanxi Province continue to exist. Considering the concealed transmission of asymptomatic infections, prevention and control work is still facing challenges.
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Background: AIDS emerged as one of the most important public health issues of the late twentieth and early twenty-first centuries. The AIDS epidemic has prompted Wide-reaching changes in public health, clinical practice, and scientific research, and has had a great impact upon socities throughout the world. Aim: This article gave an insight into beak up of mode of transmission seen in our studied area of Gujarat, which highlighted in which area one should focus more at least to control the prevalence of HIV. Material and methods: In the present study 961 HIV sero-positive patients (T group) were screened with respiratory tract infections and more 300 HIV sero-positive patients but without respiratory tract infections (C2 group) had been inquired and collected their information about mode of transmission and other demographic characters like age, literacy, financial status, gender etc. Results: The highest patients had acquired HIV by hetro -sexual mode of transmission. In T group it was found to be in 773 (80.43%), while in C2 group it was seen among 257 (85.67%) HIV infected patients. But when both groups are merged which we consider TC2 group, this hetero-sexual mode of transmission was noted in 1030 (81.68%) HIV infected patients, followed by mother to child transmission (MTCT) which was found in 101 (10.51%) patients of T group while MTCT was seen in 29 (9.67%) HIV infected patients of C2 group. Conclusion: If anybody knows exact percentage of acquiring HIV in the particular area, one can work on this direction, to reduce that particularly mode mode of transmission seen in our studied area of Gujarat, which highlighted in which area one should focus more at least to control the prevalence of HIV. Material and methods: In the present study, 961 HIV sero-positive patients (T group) were screened with respiratory tract infections and more 300 HIV sero-positive patients but without respiratory tract infections (C2 group) had been inquired and collected their information about mode of transmission and other demographic like age, literacy, financial status, gender etc. Results: The highest patients had acquired HIV by hetero9-sexual mode of transmission. In T group it was found to be in 773 (80.43%), while in C2 group it was seen among 257 (85.67%) HIV infected patients. But when both groups are merged which we consider TC2 group, this hetero-sexual mode of transmission was noted in 1030 (81.68%) HIV infected patients, followed by mother to child transmission (MTCT) which was found in 101 (10.51%) patients of T group while MTCT was seen in 29 (9.67%) HIV infected patients of c2 group Conclusion: If anybody knows exact percentage of acquiring HIV in the particular area, one can work on this direction, to reduce that particular mode of transmission so that at least prevalence of HIV could certainly be decreased tremendously in that particular area, state, country and ultimately from globe. Minimum transmission of HIV can be achieved by widespread of ABC (Abstinence, behavioral change, condoms) policy and with additional maximum and quick implementation of TasP (Treatment as prevention), PrEP (Pre-exposure prophylaxis) and PEP (Post exposure prophylaxis) as and when required in the all ART Centres of our country.
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Most cases of Middle East Respiratory Syndrome (MERS) infection in Korea (outbreak: May 11-July 4, 2015) occurred in hospital settings, with uncertain transmission modes in some cases. We performed an in-depth investigation epidemiological survey on the 178th case to determine the precise mode of transmission. A 29-year-old man living in Pyeongtaek presented on June 16 with a febrile sensation, chills, and myalgia. Upon confirmatory diagnosis on June 23, he was treated in an isolation room and discharged on July 2 after cure. An epidemiological investigation of all possible infection routes indicated two likely modes of transmission: exposure to MERS in Pyeongtaek St. Mary's Hospital during a visit to his hospitalized father (May 18-29), and infection through frequent contact with his father between the latter's referral to Pyeongtaek Good Samaritan Bagae Hospital for treatment without confirmatory diagnosis until his death (May 29-June 6). Although lack of clear proof or evidence to the contrary does not allow a definitive conclusion, all other possibilities could be excluded by epidemiological inferences. While it is impossible to trace back the modes of transmission of all cases in a large-scale outbreak, case-by-case tracking and isolation of infected individuals and those in close contact with them is important in preventing the spread. Efforts should be made to establish a methodology for rapid tracking of all possible contacts and elimination-based identification of the precise modes of transmission.
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Adult , Humans , Chills , Diagnosis , Fathers , Korea , Middle East , Myalgia , Referral and Consultation , SensationABSTRACT
Background: The clinical manifestations of HIV infection vary widely among infants, children, and adolescent. So there is a need to study the mode of transmission, clinical presentations, WHO and immunological staging among HIV infected children. Methods: Observational analytic cross sectional study. The children who were HIV positive (confirmed by ELISA for HIV-1 and HIV-2), and attending the OPD of ART Centre and SN Children Hospital, Allahabad during period of one year. The study population consisted of 47 patients, belonging to both sexes and age of 18 months to 19 years. Detailed history was taken and full clinical examination done in all cases. CD4 count was estimated at the time of presentation. Results: Predominant mode of transmission in our study was vertical and it was present in 95% cases. Fever was the most common presenting complaint and was present in 28 (59.57%) cases. The most common clinical sign was pallor in our study, present in 37 cases (78.72%) followed by lymphadenopathy 34 (72.34%). On the basis of WHO clinical staging, most of the patients in our study were found in stage 2 .On the basis of immunological staging, 51% had no evidence of immunosuppression (stage1), 18 (38.3%) had mild to advanced immunosuppression (stage 2 and 3) and 5 (10.63%) patients were severely immunosuppressed (stage 4). Conclusion: In HIV infected children predominant mode of transmission is vertical. Fever and pallor are common clinical manifestations. Most of the patients are found in WHO clinical stage 2 and immunological stage 1.
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Pregnant women are at increased risk of sexually transmitted infections (STIs) due to physiological changes that accompany pregnancy, such as congestion of the cervix, edema of the vaginal mucosa, and alterations in the vaginal flora. Syphilis and HIV are both transmitted sexually and so it is not surprise that a substantial number of people are infected with both agents. The rate of HIV and syphilis co-infection varies depending on the prevalence of both infections in the community or the patient group being studied, along with individual risk factors. 1913 apparently healthy pregnant women were recruited for the study after obtained their consent. Detection of HIV p24 antigen and antibodies to HIV1/2 was screened for using BIO-RAD in-vitro diagnostic enzyme immunoassay; syphilis was screen for using DIA-PRO in-vitro diagnostic Bio-probes enzyme immunoassay for the determination of antibodies to Treponema pallidum. Age group 26-30 had highest prevalence of HIV and VDRL in the study years, a decreasing trend was observed in the prevalence of HIV and syphilis infection within the study years. Seroprevalence of HIV and VDRL were 63(3.29%) and 03(0.16%) respectively. The prevalence of HIV and VDRL co-infection was 01(0.05%) observed in age group 26-30. This present study clearly documents a relatively declined in sero-prevalence of HIV and VDRL within the consecutive three years of study, this reflects the level of HIV and VDRL in the general population.
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In recent years HIV infections have declined in many parts of the world, however, there are still 35 million persons living with HIV infection and 2.1 million new infections occurred in 2011 worldwide. In many areas HIV continues to affect certain at risk communities viz. men who have sex with men, sex workers, clients of sex workers and injecting drug users. In Singapore the number of newly diagnosed HIV infections appears to have stabilised, however the current trend is that infected individuals are presenting at a late stage of infection and more HIV infections are being diagnosed among MSM and fewer in heterosexuals. The trend for other sexually-transmitted infections is generally stable, with gonorrhea, Chlamydia trachomatis infection and anogenital herpes showing decreases, whilst the incidence of syphilis showed an increase in 2012. Interviews with patients attending the DSC Clinic indicate that most STIs are contracted locally from casual partners. Unregulated sex workers are more frequently cited as primary contacts than are local regulated sex workers, who continue to have very low levels of STIs, underlining the benefits of the programme of routine screening, treatment and condom negotiation skills training provided by the Department of STI Control (DSC) Clinic in Singapore.
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One of the epidemiological descriptor of a fatal infectious disease is the time it takes from infection to death or the survival period. The present study has focused on trend in survival and death of Iranian nonhemophiliac HIV patients from 1988 to 2002 and has estimated the nonparametric distribution of the survival function of HIV patients with respect to different variables of interest, like mode of transmission, gender and age at the time of diagnosis.
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BACKGROUND/AIMS: The hepat it is C virus (HCV) genotypes have been shown to be differently distributed among distinct geographic areas and as sociated with different clinical present at ions. The aut hors investigated the distribution of HCV genotypes in Korean patients with chronic HCV infection and the as sociation of HCV genotypes with age, sex, severity of the liver disease, and the possible mode of transmission. METHODS: The study population consisted of 143 patients with chronic HCV infect ion: 13 with normal ALT , 78 with chronic hepatitis , 35 with cirrhosis , 17 with hepat ocellular car cinoma (HCC). HCV genotypes were determined by line probe assay. RESULTS: The principal HCV genotype was 1b ( 56%) and followed by 2a/ c ( 32%), mixed (8%), 2b ( 3%), and 1a (1%). Patients infected with type 1b and 2a/ c were older than those with ot her genotypes (p< 0.05). Genotype 1b tended to be more prevalent among patients with HCC ( 76% compared with 53% for patients with other liver diseases ; p=0.07). There was no significant relations hip bet ween genotypes and sex or mode of transmission. CONCLUSION: The most common HCV genotype in Korea was type 1b and followed by 2a/ 2c. Although patients infected with type 1b and 2a/c were older than those with other genotypes, there was no correlation between genotypes and sex, severity of liver disease, or mode of transmission.