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Seroepidemiology

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https://www.readbyqxmd.com/read/28525973/varicella-zoster-virus-seroprevalence-in-children-and-adolescents-in-the-pre-varicella-vaccine-era-germany
#1
Miriam Wiese-Posselt, Anette Siedler, Annette Mankertz, Andreas Sauerbrei, Hartmut Hengel, Ole Wichmann, Christina Poethko-Müller
BACKGROUND: In 2004, universal childhood varicella vaccination was introduced in Germany. We aimed to determine the age-specific prevalence of anti-varicella zoster virus (VZV) IgG-antibodies among children in the pre-varicella vaccine era in Germany, to identify factors associated with VZV seropositivity, and to assess the suitability of a commercially available ELISA for VZV seroepidemiological studies by comparing it with an in-house fluorescent antibody to membrane antigen test (FAMA) as the gold standard...
May 19, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28524366/contrasting-hcv-and-hiv-seroepidemiology-in-11-years-of-blood-donors-screening-in-brazil
#2
J E Levi, S M Lira, C B Bub, M B Polite, C C Terzian, J M Kutner
BACKGROUND: Blood donors are, in principle, healthy individuals who may be revealed as infectious for blood-borne agents by the laboratory screening process, depicting the asymptomatic burden of the disease. Therefore, monitoring hepatitis C virus (HCV)-infected donor and human immunodeficiency virus (HIV)-infected donor and associating to their demographical and behavioural characteristics may shed light on the dynamics and contemporary changes in these viruses' epidemiology. METHODS: Donors presenting repeatedly reactive HCV or HIV serology/nucleic acid testing (NAT) screening results were submitted to confirmatory testing...
May 19, 2017: Transfusion Medicine
https://www.readbyqxmd.com/read/28507471/seroepidemiological-study-of-toxoplasma-gondii-infection-in-a-population-of-iranian-epileptic-patients
#3
Jalal Babaie, Mohammad Sayyah, Kourosh Gharagozli, Ehsan Mostafavi, Majid Golkar
Epilepsy is one of the most common neurologic disorders. Underlying cause of epilepsy is unknown in 60 % of the patients. Toxoplasma gondii is an intracellular parasite which is capable of forming tissue cysts in brain of chronically infected hosts including humans. Some epidemiological studies suggested an association between toxoplasmosis and acquisition of epilepsy. In this study we determined seroprevalence of latent Toxoplasma infection in a population of Iranian epileptic patients. Participants were classified in three groups as Iranian epileptic patients (IEP, n = 414), non-epileptic patients who had other neurologic disorders (NEP, n = 150), and healthy people without any neurologic disorders (HP, n = 63)...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28501456/assessing-age-dependent-susceptibility-to-measles-in-japan
#4
Ryo Kinoshita, Hiroshi Nishiura
BACKGROUND: Routine vaccination against measles in Japan started in 1978. Whereas measles elimination was verified in 2015, multiple chains of measles transmission were observed in 2016. We aimed to reconstruct the age-dependent susceptibility to measles in Japan so that future vaccination strategies can be elucidated. METHODS: An epidemiological model was used to quantify the age-dependent immune fraction using datasets of vaccination coverage and seroepidemiological survey...
June 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28491117/herpes-virus-seroepidemiology-in-the-adult-swedish-population
#5
Jan Olsson, Eloise Kok, Rolf Adolfsson, Hugo Lövheim, Fredrik Elgh
BACKGROUND: Herpes viruses establish a life-long latency and can cause symptoms during both first-time infection and later reactivation. The aim of the present study was to describe the seroepidemiology of Herpes simplex type 1 (HSV1), Herpes simplex type 2 (HSV2), Cytomegalovirus (CMV), Varicella Zoster virus (VZV) and Human herpes virus type 6 (HHV6) in an adult Swedish population (35-95 years of age). METHODS: Presence of antibodies against the respective viruses in serum from individuals in the Betula study was determined with an enzyme-linked immunosorbent assay (ELISA)...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28487560/seroepidemiology-of-enterovirus-d68-infection-in-china
#6
Zichun Xiang, Linlin Li, Lili Ren, Li Guo, Zhengde Xie, Chunyan Liu, Taisheng Li, Ming Luo, Gláucia Paranhos-Baccalà, Wenbo Xu, Jianwei Wang
Human enterovirus 68 (EV-D68) is a rarely reported virus that has been linked to respiratory disease. In recent years, reports about EV-D68 infection have markedly increased worldwide. However, the epidemiological features of this emerging infection are not well understood. To evaluate the emerging EV-D68 epidemic, we isolated the circulating viral strain and investigated the seroprevalence of neutralizing antibodies (NAbs) in Beijing between 2004 and 2011. We found that the titers of EV-D68 NAbs were generally low in all age groups in sampled populations in 2004 but significantly higher in 2009...
May 10, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28483726/prevalence-of-igg-and-igm-anti-toxoplasma-gondii-antibodies-in-blood-donors-at-urmia-blood-transfusion-organization-iran
#7
Khosrow Hazrati Tappeh, Jalil Musavi, Mohammad Baradaran Safa, Hosein Galavani, Hamid Alizadeh
OBJECTIVE: The importance of toxoplasmosis lies in its global spread, opportunistic nature, and causative role in abortion or irreparable adverse effects on infants of infected pregnant women. Toxoplasma gondii has different transmission routes to humans, including blood transfusion. The objective of the present study was to evaluate the prevalence of IgG and IgM antibodies specific for T. gondii in blood donors at the Urmia Blood Transfusion Organization in west Azerbaijan, Iran. METHODS: The present analytical, descriptive study evaluated the plasma of 270 randomly selected blood bags donated in 2013...
March 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/28482131/incidence-of-acute-hepatitis-a-among-hiv-positive-patients-during-an-outbreak-among-msm-in-taiwan-impact-of-hav-vaccination
#8
Guan-Jhou Chen, Kuan-Yin Lin, Hsin-Yun Sun, Wang-Huei Sheng, Szu-Min Hsieh, Yi-Chia Huang, Aristine Cheng, Wen-Chun Liu, Chien-Ching Hung, Shan-Chwen Chang
BACKGROUND: An unprecedented outbreak of acute hepatitis A has occurred among MSM in Taiwan since June 2015. We aimed to describe the seroepidemiology of HAV infection and to investigate the relationship between HAV vaccination and the incidence of acute hepatitis A among HIV-positive patients at the largest designated hospital for HIV care during the outbreak. METHODS: Between 2012 and 2016, the HAV serostatus, vaccination history, and clinical characteristics of HIV-positive patients were retrospectively reviewed...
May 8, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28462125/helicobacter-pylori-and-cardiovascular-complications-a-mechanism-based-review-on-role-of-helicobacter-pylori-in-cardiovascular-diseases
#9
REVIEW
Prasad G Jamkhande, Surendra G Gattani, Shaikh Ayesha Farhat
Heart disease comprises a wide class of cardiovascular abnormalities, including ischemic heart disease, myocardial infarction, atherosclerosis, and coronary artery disease. It is the leading cause of death all over the world. Several traditional and novel risk factors, such as infectious and noninfectious agents, have been associated with heart disease. Out of these, Helicobacter pylori has been recently introduced as an important etiological factor for heart disease. Numerous seroepidemiological findings observed H...
December 2016: Integr Med Res
https://www.readbyqxmd.com/read/28449278/seroepidemiology-and-molecular-characterization-of-hepatitis-e-virus-infection-in-swine-and-occupationally-exposed-workers-in-punjab-india
#10
M Bansal, S Kaur, D Deka, R Singh, J P S Gill
Hepatitis E virus (HEV) has two discrete epidemiological patterns: waterborne epidemics in developing countries only, caused by HEV genotype I, and sporadic zoonotic outbreaks in developing and developed countries caused by genotypes III and IV. This study was designed to investigate seroprevalence, molecular detection and the characterization of HEV by nested RT-PCR in swine as well as the occupational risk to exposed human population in Punjab state of north-western India. The occupational risk-exposed group comprised of swine farmers (organized - mixed feed feeders and unorganized - swill feeders), slaughterhouse workers, sewage workers and veterinary internes...
April 27, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28446848/seroepidemiology-study-of-cytomegalovirus-and-rubella-among-pregnant-women-at-st-paul-s-hospital-millennium-medical-college-addis-ababa-ethiopia
#11
Mamuye Yeshwondm, Nigatu Balkachew, Bekele Delayehu, Getahun Mekonen
BACKGROUND: Maternal cytomegalovirus (CMV) and rubella infections have adverse neonatal outcomes. Both CMV and rubella are more widespread in developing countries and in communities with lower socioeconomic status. The aim of this study was to investigate sero-prevalence of CMV and rubella infection and associated possible risk factors. METHOD: Using cross sectional study design a total of 200 pregnant women were consecutively recruited starting from June and July 2014...
September 2016: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/28441959/serological-measures-to-assess-the-efficacy-of-malaria-control-programme-on-ambae-island-vanuatu
#12
Zulkarnain Md Idris, Chim W Chan, Mubasher Mohammed, Morris Kalkoa, George Taleo, Klara Junker, Bruno Arcà, Chris Drakeley, Akira Kaneko
BACKGROUND: Seroepidemiology can provide evidence for temporal changes in malaria transmission and is an important tool to evaluate the effectiveness of control interventions. During the early 2000s, Vanuatu experienced an acute increase in malaria incidence due to a lapse in funding for vector control. After the distribution of subsidised insecticide-treated nets (ITNs) resumed in 2003, malaria incidence decreased in the subsequent years. This study was conducted to find the serological evidence supporting the impact of ITN on exposure to Anopheles vector bites and parasite prevalence...
April 26, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28438407/seroprevalence-of-antibodies-against-serogroup-c-meningococci-in-the-region-of-valencia-spain-impact-of-meningococcal-c-conjugate-vaccination
#13
Lina Pérez-Breva, Raquel Abad-Torreblanca, Miguel Ángel Martínez-Beneito, Joan Puig-Barberà, Sara Alemán-Sánchez, Nuria Morant-Talamante, Macrina Sastre-Cantón, Julio A Vázquez-Moreno, Javier Díez-Domingo
BACKGROUND AND AIMS: Meningococcal C conjugate (MCC) vaccination programs provide direct and indirect protection against meningococcal disease. However, a decrease in the antibodies could affect herd immunity. We conducted a seroprevalence study to assess the immunity in subjects 8-12years after different MCCV vaccination programs were launched and evaluated the impact of vaccination on seroprotection. METHODS: Seroepidemiological study conducted from October 2010 to April 2012 in the region of Valencia, Spain...
May 19, 2017: Vaccine
https://www.readbyqxmd.com/read/28438210/specific-and-quantitative-detection-of-human-polyomaviruses-bkpyv-and-jcpyv-in-the-healthy-pakistani-population
#14
Iqra Hussain, Fareeda Tasneem, Muhammed Umer, Ayesha Pervaiz, Muslim Raza, Muhammad Imran Arshad, Naveed Shahzad
BACKGROUND: The BK Polyomavirus (BKPyV) and JC polyomavirus (JCPyV) infections are widespread in human population and have been associated with severe kidney and brain disorders, respectively. The viruses remain latent primarily in reno-urinary tract, reactivating only in case of a compromised immune system. The seroepidemiology and molecular prevalence of BKPyV and JCPyV have been widely studied both in healthy and immunocompromised patients worldwide. However, data regarding the prevalence of these viruses in the immunocompetent or apparently healthy Pakistani population is lacking...
April 24, 2017: Virology Journal
https://www.readbyqxmd.com/read/28433329/measles-epidemics-and-seroepidemiology-of-population-in-wujin-changzhou-city-jiangsu-province-china-2015
#15
Lingyan Tang, Yihong Zhou, Yingzi Pan, Hongming Zhu
The measles epidemic was rather severe in Wujin 2015, and a seroprevalence survey of measles antibody was conducted during June to September 2015 in Wjin district of Changzhou city. Blood samples were collected from community health population and convenient samples of residual blood from hospitals. Measles-specific IgG levels were measured by ELISA assay. A total of 122 measles cases were reported 2015 in Wujin district with an incidence of 8.31 per 100000 populations. A large proportion of measles cases were adults ≥20years (62...
May 19, 2017: Vaccine
https://www.readbyqxmd.com/read/28426411/toxoplasma-gondii-in-backyard-pigs-seroepidemiology-and-mouse-bioassay
#16
Erika Fernanda Torres Samico-Fernandes, Marcela Fernanda Torres Samico-Fernandes, Pedro Paulo Feitosa de Albuquerque, Jonatas Campos de Almeida, André de Souza Santos, André da Rocha Mota, Orestes Luiz de Souza Neto, Rinaldo Aparecido Mota
The aim of this study was to evaluate the occurrence of Toxoplasma gondii in backyard pigs destined for human consumption in Pernambuco state, Brazil. Blood and tissue samples (liver, heart, brain, lung and diaphragm) were collected from 224 pigs from legal slaughterhouses and tested for T. gondii infection. Antibodies to T. gondii were found in the sera of 37.9% (85/224) by using the immunofluorescence antibody test (cut-off - 1:64). Tissue samples from seropositive pigs were bioassayed in mice. Tissue samples from seropositive pigs and from mice of the bioassay were submitted to histopathology, immunohistochemistry, polymerase chain reaction (PCR) and sequencing; 14...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28381223/prevalence-perception-and-factors-associated-with-diabetes-mellitus-among-the-adult-population-in-central-vietnam-a-population-based-cross-sectional-seroepidemiological-survey
#17
Masami Miyakawa, Takayuki Shimizu, Nguyen Van Dat, Phung Thanh, Pham Thi Phuong Thuy, Nguyen Thi Hoang Anh, Nguyen Huu Chau, Yumi Matsushita, Hiroshi Kajio, Vien Quang Mai, Masahiko Hachiya
BACKGROUND: Diabetes Mellitus (DM) has rapidly become a major public health concern in Vietnam. Although the prevalence of DM has been studied in northern and southern Vietnam, little data are available for the central region. Therefore, the aims of this survey were to estimate the prevalence of DM and to identify the perception of and factors associated with DM among the adult population in central Vietnam. METHODS: We conducted a cross-sectional, population-based survey in Khánh Hòa Province, Vietnam in December 2014 using three-stage cluster sampling and probability proportional to size sampling in line with the World Health Organization STEPwise approach...
April 5, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28359621/varicella-seroepidemiology-in-united-states-air-force-recruits-a-retrospective-cohort-study-comparing-immunogenicity-of-varicella-vaccination-and-natural-infection
#18
Joshua R Duncan, Catherine T Witkop, Bryant J Webber, Amy A Costello
BACKGROUND/OBJECTIVES: Infection with varicella zoster virus (VZV) produces lifelong immunity, but duration of post-vaccination immunity has not been established. The purpose of this study is to determine if a difference exists in the long-term seropositivity of anti-VZV antibodies in a cohort of young adults who were vaccinated against varicella as compared to a similar cohort with a history of chickenpox disease, and to determine which variables best predict waning seropositivity following varicella vaccination...
March 27, 2017: Vaccine
https://www.readbyqxmd.com/read/28352258/180-nucleotide-duplication-in-the-g-gene-of-human-metapneumovirus-a2b-subgroup-strains-circulating-in-yokohama-city-japan-since-2014
#19
Miwako Saikusa, Chiharu Kawakami, Naganori Nao, Makoto Takeda, Shuzo Usuku, Tadayoshi Sasao, Kimiko Nishimoto, Takahiro Toyozawa
Human metapneumovirus (HMPV), a member of the family Paramyxoviridae, was first isolated in 2001. Seroepidemiological studies have shown that HMPV has been a major etiological agent of acute respiratory infections in humans for more than 50 years. Molecular epidemiological, genetic, and antigenetic evolutionary studies of HMPV will strengthen our understanding of the epidemic behavior of the virus and provide valuable insight for the control of HMPV and the development of vaccines and antiviral drugs against HMPV infection...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28348868/the-diversity-of-klebsiella-pneumoniae-surface-polysaccharides
#20
Rainer Follador, Eva Heinz, Kelly L Wyres, Matthew J Ellington, Michael Kowarik, Kathryn E Holt, Nicholas R Thomson
Klebsiella pneumoniae is considered an urgent health concern due to the emergence of multi-drug-resistant strains for which vaccination offers a potential remedy. Vaccines based on surface polysaccharides are highly promising but need to address the high diversity of surface-exposed polysaccharides, synthesized as O-antigens (lipopolysaccharide, LPS) and K-antigens (capsule polysaccharide, CPS), present in K. pneumoniae. We present a comprehensive and clinically relevant study of the diversity of O- and K-antigen biosynthesis gene clusters across a global collection of over 500 K...
August 2016: Microbial Genomics
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